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Influence of ultrasonic vibration on the static characteristics of an arc with a non-consumable electrode 认领 引用
1
作者 Aleksandr Savinov Artem Chudin +3 位作者 Oleg Polessky Vladimir Lysak Pavel Krasikov Dmitriy Murugov 《China Welding》 CAS 2025年第3期229-238,共10页
In this study,the influence of focused ultrasonic vibration(UV)in the arc column with a non-consumable electrode on the electro-physical characteristics of the arc,near-electrode voltage drops,and the shape and struct... In this study,the influence of focused ultrasonic vibration(UV)in the arc column with a non-consumable electrode on the electro-physical characteristics of the arc,near-electrode voltage drops,and the shape and structure of the arc column discharge were invest-igated.It was determined that a focused ultrasonic field in the welding arc column leads to an increase in the arc discharge voltage.Focusing UV on the electrode and in the welding bath does not increase arc voltage.In contrast,the presence of a focused ultrasonic field in the electrode region of the welding arc increases its voltage by 0.9 V.Under the influence of UV,the voltage drop in the cath-ode region on the arc increases by approximately 2 V,and it increases by 0.8 V in the anode region.However,the voltage in the arc column decreases slightly.The impact of a focused ultrasonic field reduces the arc diameter in the anode region and the column.In contrast,near the cathode region,the diameter increases,indicating a change in the nature of the cathodic flow of charged particles in this area. 展开更多
关键词 Non-consumable electrode Arc Ultrasonic vibration Electrophysical characteristics
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Tailoring layer-by-layer gradient porous ultra-thick electrodes via solvent-free processing method for high-areal-capacity and high-rate lithium-ion batteries 认领 引用
2
作者 Haotian Yang Jinke Shen +9 位作者 Nan Qin Yaoxin Du Yuhan An Chen Hu Yifan Li Wenlong Cai Cunman Zhang Zonghai Chen Jim P.Zheng Liming Jin 《Chinese Chemical Letters》 SCIE CAS CSCD 2026年第7期634-639,共6页
Ultra-thick electrodes(UTEs)hold great promise for high-energy-density lithium-ion batteries(LIBs),yet the practical application is hindered by challenges in precise fabrication and reaction kinetics modification.In t... Ultra-thick electrodes(UTEs)hold great promise for high-energy-density lithium-ion batteries(LIBs),yet the practical application is hindered by challenges in precise fabrication and reaction kinetics modification.In this contribution,a solvent-free processing method is introduced to tailor UTEs through layerby-layer fabrication with positive,uniform,and negative gradient porosity from the separator side to the current collector side,denoted as P-UTEs,U-UTEs,and N-UTEs.In contrast to conventional slurry coating,the proposed solvent-free approach effectively circumvents capillary stress,thereby facilitating the fabrication of crack-free UTEs(>300μm)while simultaneously mitigating environmental toxicity concerns.The three-layer N-UTEs(>220μm)with a gradient porosity of(~34%,~31%,~27%)deliver an exceeding areal capacity over 5 m Ah/cm2 at 0.29 mA/cm2 and a high-capacity retention over 62% at 2.9 m A/cm2,indicating a favorable balance between the areal capacity and the high-rate behavior.Detailed mechanistic simulations reveal that the multi-center reaction pathways enabled by enhanced ionic accessibility in N-UTEs significantly improve reaction kinetics.This work offers new insights into the gradient porosity tailoring for high-areal-capacity and high-rate UTEs for the next generation LIBs. 展开更多
关键词 Gradient porous structure Electrode kinetics Ultra-thick electrodes Solvent-free processing method Lithium-ion battery
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Bidentate P-O-Ni motif-induced"proton sponge effect"streamlines hydrogen escape for paired electrode reactions 认领 引用
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作者 Keping Wang Mei Wu +3 位作者 Zhenrong Liu Xihong Lu Song Yang Hu Li 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2026年第4期880-891,I0021,共12页
The hybrid water splitting system offers a carbon-neutral solution to relieve energy-related challenges,with the proton activation/migration in reactants entailing tailor-made anodic and cathodic catalysts.Herein,a P-... The hybrid water splitting system offers a carbon-neutral solution to relieve energy-related challenges,with the proton activation/migration in reactants entailing tailor-made anodic and cathodic catalysts.Herein,a P-containing oxyanion-induced"proton sponge effect"is engineered to enable simultaneous two-electrode reactions of enhanced efficiency via streamlining hydrogen escape.Via hydrothermal and phosphorylation treatment,the constructed bidentate P-O-Ni motif is highly active for paired benzylamine oxidation and hydrogen evolution,affording benzonitrile with a>99%yield and Faradaic efficiency,and H2in an evolution rate of 25.8 mL cm-2h-1,respectively.The protophilic P-oxyanion elongates the C-H/N-H bond of benzylamine to streamline its cleavage and enables the O-H destabilization of Ni2+-OH to expedite Ni3+-O formation,collectively propelling benzonitrile production.Meanwhile,the rigid H-OH network of water can be undermined by the oxyanion to prolong its O-H bond,favoring the generation of active H*to bolster H2evolution.Various primary amines are also amenable to the developed protocol,attaining 91-98%yields for nitriles.Additionally,the developed anode/cathode demonstrates excellent survivability(60 h at least)in membrane electrode assembly systems.This work emphasizes the feasibility/criticality of streamlining proton transfer for both electrodes,pioneering an insightful paradigm for electrocatalyst customization in concurrent electrooxidation and hydrogen production. 展开更多
关键词 Paired electrode reactions Streamlining hydrogen escape Nitrile evolution reaction Water dissociation Membrane electrode assembly
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Electrochemically Enhanced Low-Impedance Ti3C2Tx MXene Epidermal Electrodes for Accurate Electrophysiological Monitoring 认领 引用
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作者 Liubing Fan Fangfang Gao +7 位作者 Liangxu Xu Xiaochen Xun Shuchang Zhao Bing Yang Han Bi Xuan Zhao Qingliang Liao Yue Zhang 《Nano-Micro Letters》 SCIE EI CAS CSCD 2026年第9期6-24,共19页
Accurate monitoring of electrophysiological signals through epidermal electrodes is crucial for advancing human–machine interfaces and wearable healthcare. While highly conductive materials are conventionally used as... Accurate monitoring of electrophysiological signals through epidermal electrodes is crucial for advancing human–machine interfaces and wearable healthcare. While highly conductive materials are conventionally used as epidermal electrodes, their limited electrochemical performance results in high interfacial impedance and consequent signal distortion. Here, we present an electrochemically enhanced low-impedance Ti3C2Tx MXene epidermal electrode for accurate electrophysiological monitoring. The low interfacial impedance is achieved by producing and bridging large Ti3C2Tx MXene nanosheets. Large MXene nanosheets were prepared by combining precursor particle sedimentation with mild shear-assisted exfoliation. An orderly stacking structure was constructed through hydroxyethyl cellulose(HEC) crosslinking large MXene nanosheets to enhance electrochemical performance and flexibility. The epidermal electrodes were fabricated by bonding HEC/MXene film to poly(dimethylsiloxane) substrate via in-situ curing. The MXene epidermal electrodes exhibit lower interfacial impedance(53 k Ω cm2 at 10 Hz) compared to standard Ag/AgCl gel electrodes(436 k Ω cm2 at 10 Hz). This reduction results in a 2.4-fold improvement in signal-to-noise ratio, enabling accurate electrophysiological monitoring. A miniature recording system is integrated with the epidermal electrodes to monitor electrophysiological signals in wearable scenes. Physiological applications have been validated in gesture recognition and health monitoring. Therefore, the electrochemically enhanced low-impedance MXene epidermal electrodes offer a reliable option for acquiring high-fidelity electrophysiological signals. 展开更多
关键词 Two-dimensional materials MXene Epidermal electrodes Electrophysiology Wearable healthcare
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Transition metal-loaded granular activated carbon as efficient three-dimensional electrode for humic acid removal 认领 引用
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作者 Jianhong Jiang Man Yang +6 位作者 Min Huang Xinyao Guo Xia Tao Li Xu Yue Lu Lin Tang Yi Cheng 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2026年第5期463-473,共11页
Three-dimensional(3D)electrochemical treatment of organic wastewater has gained enormous interest due to its merits such as high processing efficiency,low energy consumption and environmental friendliness.However,the ... Three-dimensional(3D)electrochemical treatment of organic wastewater has gained enormous interest due to its merits such as high processing efficiency,low energy consumption and environmental friendliness.However,the stability and cost issues of electrode materials still limit their practical applications.In this study,granular activated carbon(GAC)supported metal(Sn,Fe,Mn and Co)composites have been developed through an impregnation and pyrolysis method.Metal oxides and metal nitrides were formed on the GAC particle through high-temperature pyrolysis with the presence of cyanamide.The materials were applied for the removal of simulated and real humic acid(HA)wastewater,the Sn loaded GAC composite displays exceptionally high performance for electrocatalytic HA removal,achieving a removal rate of 98.4%for simulated HA wastewater in 90 min and a similar removal rate(98.9%)for real HA wastewater in 120 min.Further,the material demonstrated outstanding cyclic stability in simulated HA wastewater,the removal efficiency only slightly dropped from 98.2%to 94.2%after 14 cycles.The high removal efficiency of the metal-loaded GAC(GAC/M)is likely due to the transition metal bringing abundant catalytic sites and enhanced charge transfer as well as the electro Fenton-like effect.These findings highlight the substantial potential of metal-loaded GAC 3D electrochemical systems for sustainable applications in wastewater treatment. 展开更多
关键词 Metal-loaded GAC Particle electrode Humic acid Electrocatalytic degradation
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Extreme manufacturing of minimally invasive intracortical neural electrodes 认领 引用
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作者 Mingliang Xu Ziyi Zhu +9 位作者 Haoran Ma Guopei Zhou Iliasov Artem Zhen Chen Wei-Mong Tsang Jinsong Wu Chengyu T Li Xiaoling Wei Fei He Ruxin Li 《International Journal of Extreme Manufacturing》 SCIE EI CAS CSCD 2026年第2期315-351,共37页
Small and flexible penetrating neural electrodes have recently emerged as a promising technology for both fundamental brain science and advanced brain-computer interfaces.These neural electrodes are designed with exce... Small and flexible penetrating neural electrodes have recently emerged as a promising technology for both fundamental brain science and advanced brain-computer interfaces.These neural electrodes are designed with exceptional flexibility and adaptability to seamlessly interact with delicate neural tissue,enabling sub-millisecond recording of individual neurons and stimulation of small neuronal clusters in the brain.In this review,we analyze the fundamental physical constraints imposed on electrical neural interfacing and highlight the significant progress achieved by those minimally invasive neural probes over the past decade.Furthermore,we discuss the research needs in manufacturing techniques,materials science,as well as surface functionalization processes for improving the long-term stability and reliability of neural electrodes.Finally,we summarize the emerging trends and outline the technological challenges faced in this rapidly evolving field. 展开更多
关键词 neural electrodes brain-computer interfaces electrophysiology long-term stability microano fabrication
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Stable nickel electrode for durable perovskite solar modules 认领 引用
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作者 Zhengtian Tan Zheng Zhou +12 位作者 Rui Chen Wenguang Liu Qisen Zhou Jianan Wang Huaiqing Luo He Zhu Tianyin Miao Wenpei Li Xiaoxuan Liu Hasan Raza Sanwan Liu Zonghao Liu Wei Chen 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2026年第5期496-503,I0012,共8页
Perovskite solar cells(PSCs)have emerged as a promising candidate for next-generation photovoltaic technologies owing to their low fabrication costs and remarkable power conversion efficiencies(PCEs).Nevertheless,thei... Perovskite solar cells(PSCs)have emerged as a promising candidate for next-generation photovoltaic technologies owing to their low fabrication costs and remarkable power conversion efficiencies(PCEs).Nevertheless,their commercialization is hindered by long-term stability issues,particularly the irreversible performance degradation caused by electrode corrosion and ion diffusion during prolonged operation.Here,we present a thermally evaporated non-noble metal electrode,a nickel(Ni)electrode,with exceptional intrinsic physicochemical stability as an alternative to conventional metal electrodes for highly stable perovskite devices.We demonstrate that the Ni electrode exhibits appropriate energylevel alignment and a higher charge migration barrier,endowing it with superior intrinsic stability compared to traditional copper(Cu)electrodes while effectively mitigating interfacial reactions between the perovskite layer and the metal electrode.Consequently,we achieve PCEs of 23.21%and 15.45%for smallarea devices and perovskite solar modules(PSMs,aperture area:113 cm2)based on Ni-electrode,respectively,representing the highest reported efficiencies for PSCs utilizing inert non-noble metal electrodes to date.More importantly,the encapsulated PSM retains 96.4%of its initial PCE after 1000 h of thermal aging at 65℃in ambient air,underscoring the exceptional operational stability of the proposed Nibased electrode system. 展开更多
关键词 Perovskite solar modules Nickel electrode Long-term operational stability
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High-Performance Cu-Based Liquid Thermocells Enabled by Thermosensitive Crystallization and Etched Carbon Cloth Electrode 认领 引用
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作者 Wei Fang Zeping Ou +9 位作者 Yifan Wang Zhe Li Qian Huang Pengchi Zhang Xinzhe Li Yujie Zheng Lijun Hu Chen Li Jianyong Ouyang Kuan Sun 《Nano-Micro Letters》 SCIE EI CAS CSCD 2026年第4期638-650,共13页
Thermocells are garnering increasing attention as a promising thermoelectric technology for harvesting low-grade heat.However,their performance is often limited by the scarcity of high-performance redox couples that p... Thermocells are garnering increasing attention as a promising thermoelectric technology for harvesting low-grade heat.However,their performance is often limited by the scarcity of high-performance redox couples that possess both high thermopower and rapid redox kinetics.This work addresses this challenge by leveraging our recently developed copper(Ⅰ/Ⅱ)(Cu+/Cu2+)redox couple.We significantly enhance the performance of Cu-based liquid thermocells by integrating a thermosensitive crystallization process with etched carbon cloth electrodes,achieving synergistic improvements in thermodynamic and kinetic performance.The thermosensitive crystallization process establishes a persistent Cu2+concentration gradient,boosting the thermopower from 1.47 to 2.93 mV K-1.Moreover,the etched carbon cloth electrodes provide a larger electroactive surface area and demonstrate a higher current density.Consequently,the optimized Cu+/Cu2+system achieved an exceptional normalized power density Pmax(ΔT)-2of 3.97 mW m-2K-2.A thermocell module comprised of 20 cells directly power various electronic devices at a temperature difference of 40 K.This work successfully exhibits potential of Cu+/Cu2+redox couple in thermoelectric conversion and introduces a valuable redox couple for highperformance thermocells. 展开更多
关键词 Thermocell Thermosensitive crystallization Porous carbon electrode Power density Low-grade heat harvest
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Nano-vapor deposition for high-performance biomimetic dry battery electrodes 认领 引用
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作者 Dichen Wu Zhiwei Zhu +6 位作者 Lei Jing Wenrui Cai Bowen Deng Lanxiang Feng Xuewei Fu Wei Yang Yu Wang 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2026年第6期567-577,I0014,共11页
High-performance dry battery electrodes(DBEs)are in critical need by next-generation energy-storage technologies,but face a fundamental challenge in the solvent-free formation of a uniform and robust active-material m... High-performance dry battery electrodes(DBEs)are in critical need by next-generation energy-storage technologies,but face a fundamental challenge in the solvent-free formation of a uniform and robust active-material microenvironment(AMME)inside the DBEs due to the lack of both a rational design of their microstructures and the corresponding processing method.Here,we report a nano-vapor deposition(NVD)technology for the fabrication of thick DBEs featured by efficient vascular-like gradient AMME.Specifically,nano-vapors of poly(acrylic acid)(PAA)and carbon nanotube are generated by strong shearing effects and co-deposited onto the active-material(AM)-particle surface to form a capillary-like conductive network,which is further connected by long carbon-nanofiber and polyvinylidene fluoride(PVDF)nano-melt in the final DBEs.Enabled by the NVD-generated biomimetic AMME microstructures,mechanically strong and ultra-thick DBEs are successfully fabricated simply by hot-compression.Meanwhile,the resultant thick DBE shows thickness-insensitive electrochemical performances even with an extremely high AM-loading(77 mg/cm2)and high AM content(96 wt%),which is unfeasible for conventional thick DBEs.This study not only provides a promising NVD technology for solvent-free surface modification of AM particles and beyond,but also demonstrates the advances of biomimetic design of the dry-electrode slurry for future high-performance electrochemical devices. 展开更多
关键词 Nano-vapor deposition Active material microenvironment Dry battery electrodes Bioinspired microstructures Surface nanocoating
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Advances in Surface/Interface Engineering of Under-Water Superaerophobic Electrodes for Hydrogen Evolution Reaction by Manipulating of Bubbles 认领 引用
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作者 Annan He Fengxiang Chen +5 位作者 Jun He Xian Zhang Shangzhen Xie Na Yao Zhiguang Guo Weilin Xu 《Nano-Micro Letters》 SCIE EI CAS CSCD 2026年第10期512-550,共39页
The ever-increasing consumption of fossil fuels has led to environmental crises,which accelerated the quest for sustainable hydrogen energy.Among various production routes,water electrolysis stands out as a promising ... The ever-increasing consumption of fossil fuels has led to environmental crises,which accelerated the quest for sustainable hydrogen energy.Among various production routes,water electrolysis stands out as a promising approach.However,the efficiency of hydrogen evolution reaction is limited by the adhesion of gas bubbles on electrode surfaces,which blocks active sites,increases overpotential,and limits mass transfer.This review highlights the design of microanostructured array electrodes to achieve underwater superaerophobicity,reducing bubble adhesion,facilitating the nucleation and rapid release of ultrasmall bubbles,thereby contributing to reduce in overpotential,faster bubble growth,enhanced mass transport,and improved catalyst stability.We summarize recent advances in fabrication strategies of such electrodes,focusing on microanostructural designs,covering from 0 to 3-dimensional structures.Additionally,the role of hydrophilic gels in optimizing superaerophobicity is discussed.Finally,challenges and future directions are addressed,including bubble dynamics accurate modeling,development of high activity and stability catalysts,intelligent adaptive electrode structure and active bubble regulation,and the integration of artificial intelligence and deep learning for guided electrode design.This review aims to provide a comprehensive perspective on how superaerophobic electrode design address bottlenecks in gas-evolving electrodes,paving the way toward more efficient and economical hydrogen production. 展开更多
关键词 Hydrogen evolution reaction Superaerophobic electrodes Microanostructure Bubble manipulation Electrocatalysis
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Mn-doping induced phase segregation of air electrodes enables high-performance and durable reversible protonic ceramic cells 认领 引用
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作者 Xiaofeng Chen Yixuan Huang +8 位作者 Wanbin Lin Jiaojiao Xia Xirui Zhang Wenjie Gong Chuqian Jian Hao Liu Jiacheng Zeng Jiang Liu Yu Chen 《Chinese Journal of Catalysis》 SCIE EI CAS CSCD 2026年第2期333-343,共11页
Reversible protonic ceramic cells(R-PCCs)represent a highly promising energy conversion and storage technology,offering high efficiency at intermediate temperatures(400–700℃).However,their commercialization is signi... Reversible protonic ceramic cells(R-PCCs)represent a highly promising energy conversion and storage technology,offering high efficiency at intermediate temperatures(400–700℃).However,their commercialization is significantly impeded by the sluggish oxygen reaction kinetics on air electrodes.This work reports a Mn-doped PrBa0.8Ca0.2Co2O5+δair electrode with a nominal composition of PrBa0.8Ca0.2Co1.5Mn0.5O5+δ,which primarily segregates into a deficient double perovskite Pr1.25Ba0.5Ca0.25Co1.58Mn0.42O5+δphase and a minor BaCo0.6Mn0.4O3-δhexagonal perovskite phase,as suggested by the X-ray diffraction refinement.The formation of Mn-doped nanocomposites substantially enhances the activities of oxygen reduction/evolution reactions,attributed to elevated oxygen vacancy concentrations and improved oxygen surface exchange and bulk diffusion capabilities,relative to the undoped PrBa0.8Ca0.2Co2O5+δ.The synergistic effect between the two phases may enhance electrochemical performance.Single cells incorporating these nanocomposite air electrodes achieve exceptional electrochemical performance at 700℃:peak power density of 2.05 W cm-2 in fuel cell(FC)mode and current density of–3.78 A cm-2 at 1.3 V in electrolysis(EL)mode.Furthermore,promising durability is demonstrated during a FC test(100 h),an EL test(100 h),and a FC-EL cycling test(120 h)at 600℃.This Mn-doping approach establishes an effective strategy for developing advanced air electrode materials. 展开更多
关键词 Reversible protonic ceramic cells Air electrodes Mn-doping Oxygen reduction reactions Oxygen evolution reaction
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Lithium dendrite growth modeling under electrode surface morphology control 认领 引用
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作者 Xinhua Liu Xingrui Wang +7 位作者 Lisheng Zhang Kaiyi Yang Feiran Li Justice Delali Akoto Nadeen S.B.M.Alotai Rui Tan Muyang Chen Mengzheng Ouyang 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2026年第6期477-487,I0012,共11页
Lithium metal is widely regarded as the most ideal anode material for constructing next-generation highenergy–density batteries due to its extremely high theoretical specific capacity and lowest electrochemical poten... Lithium metal is widely regarded as the most ideal anode material for constructing next-generation highenergy–density batteries due to its extremely high theoretical specific capacity and lowest electrochemical potential,targeting applications such as electric vehicles,large-scale energy storage power plants,and portable electronic devices.However,lithium metal anodes are prone to uncontrolled growth of lithium dendrites during charging and discharging,which not only leads to a decrease in coulombic efficiency and a decline in cycle life but may also pierce the separator,causing internal short circuits and thermal runaway,thereby severely threatening battery safety.In this paper,taking electrode surface morphology as the entry point,we systematically analyzed the influence of composite morphology composed of roughness and typical defects on dendrite growth,and revealed the positive feedback mechanism between electrode morphology,electric field distribution,and concentration field.Based on this,a Monte Carlo method is introduced to establish a multi-physics coupling model,quantitatively characterizing the effects of electric field directionality,thermally activated migration probability,and concentration gradients on dendrite growth rate and morphology evolution.Simulation results indicate that high-curvature defects significantly enhance the tip electric field and local ion migration rate,thereby accelerating dendrite formation;however,by optimizing electrode morphology,homogenizing electric field distribution,and improving ion transport properties,dendrite nucleation can be effectively suppressed.The findings of this study provide a theoretical basis and parameterization guidance for elucidating the mechanisms of lithium dendrite growth and designing suppression strategies,holding significant implications for enhancing the safety and lifespan of novel high-energy–density energy storage systems. 展开更多
关键词 Li dendrite growth Electrode surface morphology Dendrite suppression strategies Local electric field
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Bionic stacked 3D engineered functional electrodes for ultra-high efficient hydrogen production 认领 引用
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作者 Zhaolong Wang Xiaolong Wang +2 位作者 Mingzhu Xie Yong Shuai Qi Ge 《International Journal of Extreme Manufacturing》 SCIE EI CAS CSCD 2026年第3期882-893,共12页
The bubbles formed on the electrodes tend to stick to the reaction area during hydrogen(H2)production,hindering the continuous reaction,which drastically reduces the H2 production efficiency.In this work,a customizabl... The bubbles formed on the electrodes tend to stick to the reaction area during hydrogen(H2)production,hindering the continuous reaction,which drastically reduces the H2 production efficiency.In this work,a customizable multifunctional three-dimensional(3D)electrode with bionic structures is proposed and precisely fabricated by the projection microstereolithography(PμSL)3D printing technique,which facilitates the catalytic reaction and the detachment of H2 bubbles with an asymmetrically wetted bioinspired functional membrane to allow bubbles to pass through based on Janus effects.The 3D bionic functional electrodes exhibit excellent H2 production performance.At the same voltage,the current density of our 3D electrode is 2.5 times greater than that of a two-dimensional(2D)electrode and 8 times greater than that of a one-dimensional(1D)common flat electrode with the same surface area.Moreover,the amount of H2 collected from a 3D bionic functional electrode is 53.9%and 172.1%greater than that collected from 2D and 1D electrodes with the same catalyst size,respectively.Significantly,a 400 cm2 panel reactor system based on biomimetic 3D functional electrodes enables one-week continuous operation with ultra-high safety and durability in H2 production.Coupled with a solar panel,it achieves long-term outdoor H2 production and gas collection. 展开更多
关键词 hydrogen production multifunctional 3D electrode bionic structures Janus membrane high-performance
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An Electrochemiluminescence-Based Arsenic(Ⅲ)Sensor using Luminol on Screen-Printed Gold Electrodes 认领 引用
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作者 Harmesa Harmesa Isnaini Rahmawati +5 位作者 Andrea Fiorani Yasuaki Einaga Eny Kusrini A'an Johan Wahyudi Asep Saefumillah Tribidasari A Ivandini 《电化学（中英文）》 CAS 北大核心 2026年第2期46-60,共15页
Electrochemiluminescence(ECL)of luminol has been studied on a screen-printed gold electrode for a simple and sensitive detection of arsenic ions(As(III)).Cyclic voltammetry(CV)was applied as the proposed technique to ... Electrochemiluminescence(ECL)of luminol has been studied on a screen-printed gold electrode for a simple and sensitive detection of arsenic ions(As(III)).Cyclic voltammetry(CV)was applied as the proposed technique to study luminol's electrochemical behavior and to evaluate the arsenic's effect in the ECL system,while hydrogen peroxide(H2O2)served as a co-reactant to enhance luminol's light emission under alkaline conditions.To achieve optimal electrode performance,key parameters including pH,scan rate,and the concentrations of H2O2and luminol were carefully optimized.The presence of As(III)induced a quenching effect on the luminol/H2O2ECL system,leading to a linear decrease in ECL signal across the wide concentration range of 1 nmol·L-1to 150μmol·L-1.The system demonstrated a low detection limit of 1.21 nmol·L-1and exhibited excellent repeatability with a relative standard deviation of 2.27%,highlighting its sensitivity and reliability for As(III)detection.A key advantage of this study was the successful use of commercial bare electrodes,which were readily available and required no modifications,proving their effectiveness for ECL-based arsenic sensing.The optimized buffer solution pH of 10 played a critical role in enhancing arsenic detection selectivity,as it facilitated the optimal deprotonation of luminol and ensured arsenic remained in its dissolved state,whereas other potential metal ion interferences were more likely to form solid metal(hydro)oxides.Furthermore,the developed sensor was successfully applied for As(III)detection in a seawater matrix,demonstrating its potential as a robust and effective ECL-based arsenic sensor for environmental applications. 展开更多
关键词 Arsenic(III)detection Electrochemiluminescence Gold electrode Hydrogen peroxide Quenching effect
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A larger work function in hybrid hard carbon-graphite negative electrodes produces a thermally stable solid electrolyte interphase for lithium-ion batteries at 65℃ floating charge conditions 认领 引用
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作者 Han Yalu Wang Hao +8 位作者 Xie Lijing Chen Jingpeng Ge Lin Zhao Yan Di Huifang Song Ge Li Xiaoming Yi Zonglin Su Fangyuan 《新型炭材料（中英文）》 SCIE EI CSCD 北大核心 2026年第2期508-524,I0062-I0066,共17页
The electrochemical stability of lithium-ion batteries strongly depends on the thickness of the solid electrolyte interphase(SEI)formed on graphite anodes.Nevertheless,electrolyte decomposition at the anode surface,es... The electrochemical stability of lithium-ion batteries strongly depends on the thickness of the solid electrolyte interphase(SEI)formed on graphite anodes.Nevertheless,electrolyte decomposition at the anode surface,espe-cially at 65℃,leads to uncontrolled SEI growth.We have designed a hybrid negative electrode by incorporating hard carbon(HC)into graphite to increase the surface work function,which effectively hinders electron escape,thereby reducing electrolyte reduction and inhibiting thick SEI formation at 65℃.The disordered structure of HC faciitates lithiumion diffusion and prevents lithium plating on the electrode surface.As a result,a hybrid negative electrode containing 50%HC has an especially high capacity(98 mAh/g)at 8 C and long cycle life at 0.5 C at room temperature.Further-more,in a full battery it has an excellent capacity(128.54 mAh/g)and stable floating charge for 144 h at 65℃.The electrode achieves a balance between high energy density and high-power density for lithium-ion batteries,thus maintaining stability even during a floating charge at a temperature of 65℃.This is attributed to the formation of a thinner and more robust SEI.This study provides a mechanistic understanding of how the electrode work function governs electrolyte decomposition and SEI evolution,offering a practical strategy for slowing the degradation of lithium-ion batteries at 65℃. 展开更多
关键词 Hybrid negative electrode Graphite Hard carbon Solid electrolyte interphase High temperature floating charge
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Fast-charging lithium-ion batteries electrodes enabled by self-regulating micro-channels networks 认领 引用
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作者 Yongtai Xu Zhiwen Zheng +5 位作者 Jianze Feng Xixian Li Kailimai Su Ziqiang Liu Hui Ying Yang Xingbin Yan 《Chinese Chemical Letters》 SCIE CAS CSCD 2026年第4期396-400,共5页
Lithium-ion batteries(LIBs)are essential energy storage devices widely used in portable electronics,transportation,and various other applications.However,current anode materials,with their low intercalation potentials... Lithium-ion batteries(LIBs)are essential energy storage devices widely used in portable electronics,transportation,and various other applications.However,current anode materials,with their low intercalation potentials and poor rate performance,struggle to balance energy density,power density,and safety,particularly under extreme conditions.In this work,we report a self-regulating micro-channel network that forms a three-dimensional(3D)composite electrode architecture without binders and conductive additives,offering a promising anode solution for fast-charging LIBs.Benefiting from the robust 3D architecture with abundant Li+active sites and superior electronic conductivity,the niobium tungsten oxide@carbon nanotube(NWO/CNT)composite electrode demonstrates a high reversible capacity(246.6mAh/g at 0.2 C),excellent rate capability(117.1 mAh/g at 60 C),and long-term durability(73.0%capacity retention after 10,000 cycles).Additionally,a thick electrode with high mass loading(10 mg/cm2)shows remarkable high-rate performance,retaining 51.7%capacity at 20 C.Notably,when paired with LiFePO4(LFP)cathodes,the NWO@CNT//LFP@CNT full batteries exhibit impressive high-power capability(2.8 kW/kg),high energy density(394.2 Wh/kg),and exceptional cycle stability(82%capacity retention after 6000 cycles).Most importantly,this composite electrode architecture also enables the fabrication of a planar,miniaturized,all-solid-state lithium-ion battery with fast-charging capabilities. 展开更多
关键词 Fast-charging lithium-ion batteries Self-regulating nanotube networks High-rate capability Long-term cycling performance Free-standing composite electrode
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Designing an air electrode for dual ceramic cells using an ionic Lewis acid strength polarization distribution strategy 认领 引用
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作者 Ying Zhang Yibei Wang +8 位作者 Zhilin Liu Yaowen Wang Zhen Wang Youcheng Xiao Bingbing Niu Xiyang Wang Guntae Kim Wenquan Wang Tianmin He 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2026年第1期505-516,I0012,共12页
Ceramic cells promise ideal energy conversion and storage devices,making the development of efficient and robust air electrodes crucial for their application.In this study,a Ba0.4Sr0.5Cs0.1Co0.7Fe0.2Nb_... Ceramic cells promise ideal energy conversion and storage devices,making the development of efficient and robust air electrodes crucial for their application.In this study,a Ba0.4Sr0.5Cs0.1Co0.7Fe0.2Nb0.1O3−δ(BSCCFN)air electrode,based on Ba0.5Sr0.5Co0.8Fe0.2O3−δ(BSCF),is designed using a perovskite A-B-site ionic Lewis acid strength(ISA)polarization distribution strategy and is successfully applied in both oxygen-ion conducting solid oxide fuel cells(O-SOFCs)and proton-conducting reversible protonic ceramic cells(R-PCCs).When BSCCFN is used as the air electrode in O-SOFCs,a peak power density(PPD)of 1.45 W cm−2is achieved at 650°C,whereas in R-PCCs,a PPD of 1.13 W cm−2and a current density of−1.8 A cm−2at 1.3 V are achieved at the same temperature and show stable reversibility over 100 h.Experimental measurements and theoretical calculations demonstrate that low-ISA Cs+doping accelerates the reaction kinetics of both oxygen ions and protons,while high-ISA Nb5+doping enhances electrode stability.The synergistic effect of Cs+and Nb5+co-doping in the BSCCFN electrode lies in the ISA polarization distribution,which weakens the Co/Fe–O bond covalency,thereby promoting oxygen vacancy formation and facilitating the conduction of oxygen ions and protons. 展开更多
关键词 Air electrode Ceramic cell Electrochemical performance lonic Lewis acid strength polarization distribution Co/Fe-O bond
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EDIS:A simulation software for dynamic ion intercalation/deintercalation processes in electrode materials 认领 引用
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作者 Liqi Wang Ruijuan Xiao Hong Li 《Chinese Physics B》 SCIE EI CAS CSCD 2026年第1期188-203,共16页
As the core determinant of lithium-ion battery performance,electrode materials play a crucial role in defining the battery's capacity,cycling stability,and durability.During charging and discharging,electrode mate... As the core determinant of lithium-ion battery performance,electrode materials play a crucial role in defining the battery's capacity,cycling stability,and durability.During charging and discharging,electrode materials undergo complex ion intercalation and deintercalation processes,accompanied by defect formation and structural evolution.However,the microscopic mechanisms underlying processes such as cation disordering,lattice oxygen loss,and stage structure formation are still not fully understood.To address these challenges,we have developed the Electrode Dynamic Ion Intercalation/Deintercalation Simulator(EDIS),a software platform designed to simulate the dynamic processes of ion intercalation and deintercalation in electrode materials.Leveraging high-precision machine learning potentials,EDIS can efficiently model structural evolution and lithium-ion diffusion behavior under various states of charge and discharge,achieving accuracy approaching that of quantum mechanical methods in relevant chemical spaces.The software supports quantitative analysis of how variations in lithium-ion concentration and distribution affect lithium-ion transport properties,enables evaluation of the impact of structural defects,and allows for tracking of both structural evolution and transport characteristics during continuous cycling.EDIS is versatile and can be extended to sodium-ion batteries and related systems.By enabling in-depth analysis of these microscopic processes,EDIS provides a robust theoretical tool for mechanistic studies and the rational design of high-performance electrode materials for next-generation lithium-ion batteries. 展开更多
关键词 electrode materials ion(de)intercalation dynamic simulation machine learning potential
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The adhesive interlayer effect on the thermoelectric structure with multiple electrodes 认领 引用
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作者 Xiaojuan TIAN Yueting ZHOU 《Applied Mathematics and Mechanics(English Edition)》 SCIE EI CSCD 2026年第3期573-598,共26页
Driven by the trend of device miniaturization and high-density integration,the interaction between adjacent electrodes has become a critical factor affecting the interfacial reliability of thermoelectric(TE)structures... Driven by the trend of device miniaturization and high-density integration,the interaction between adjacent electrodes has become a critical factor affecting the interfacial reliability of thermoelectric(TE)structures.This study investigates the influence of adjoining electrode interactions on the interfacial response of a multi-electrode/TE substrate structure,including interfacial stresses and stress intensity factors at the electrode ends.To solve the corresponding boundary-value problem,the Fourier transforms are adopted to derive a governing integro-differential equation for the interfacial shear stress in multi-electrode systems,incorporating the TE effects as generalized forces on the right-hand side.The results show that both the interfacial tension and transverse stress in the electrodes are significantly affected by the presence of adjacent electrodes.The interaction between neighboring electrodes diminishes as their spacing increases or when an adhesive interlayer is introduced.Furthermore,the softer and thinner electrodes,the softer and thicker adhesive interlayer,and the smaller TE loads are found to be beneficial for improving the interfacial performance.These findings may contribute to the accurate measurement in surface sensors and layout design of multi-point health monitoring systems for TE structures. 展开更多
关键词 thermoelectric(TE)material multiple electrodes adhesive interlayer interface behavior
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Hard-Soft Ion Pairing:A New Lever for Zinc Electrode Potential Regulation 认领 引用
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作者 Shiyi Zeng Xiaogang Liu Shaohua Jiang 《Rare Metals》 SCIE EI CAS CSCD 2026年第7期4-6,共3页
Metal electrode potential is commonly regarded as an intrinsic thermodynamic parameter of a metal/metal ion couple.In practical electrolytes,however,the local ionic environment can alter this potential.This issue is i... Metal electrode potential is commonly regarded as an intrinsic thermodynamic parameter of a metal/metal ion couple.In practical electrolytes,however,the local ionic environment can alter this potential.This issue is important for aqueous zinc batteries.The Zn/Zn2+redox potential determines the thermodynamic driving force for Zn plating/stripping and its competition with parasitic hydrogen evolution.Most electrolyte studies have focused on solvation regulation,water activity control,or interfacial passivation.The role of coordination shell ions in shifting metal redox potentials has received less attention. 展开更多
关键词 metal electrode potential hard soft ion pairing interfacial passivati thermodynamic driving force aqueous zinc batteries solvation regulationwater activity controlor ionic environment zn zn redox potential
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