期刊文献+
任意字段
题名或关键词
题名
关键词
摘要
作者
第一作者
机构
刊名
分类号
参考文献
作者简介
基金资助
栏目信息
共找到30篇文章
< 1 2 >
每页显示 20 50 100
已选0条
引用分析
参考文献
引证文献
 统计分析
检索结果
已选文献
显示方式：
Difluorocarbene grafted on carbon for high-power supercapacitors 认领 引用
1
作者 Kai Gu Zhenyu Chen +6 位作者 Yuxun Yuan Ting Yang Yihan Wang Lei Zhou Lingchao Wu Guilin Feng Weiqing Yang 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2026年第7期591-601,I0014,共11页
Biomass-derived activated carbon is a highly promising electrode material for supercapacitors.However,its widespread application is often limited by insufficient power density,stemming from low electrical conductivity... Biomass-derived activated carbon is a highly promising electrode material for supercapacitors.However,its widespread application is often limited by insufficient power density,stemming from low electrical conductivity and sluggish ionic transport.To address these challenges,we developed a difluorocarbene-grafted strategy that fluorinates surface carbonyl groups on carbon through a gassolid reaction path.This process effectively induces a redistribution of carbon atomic electron density and concurrently reconfigures the microporous-mesoporous architecture.The resultant synergistic effects significantly enhance both charge transport efficiency and ionic storage capacity.The optimized fluorinated macadamia nut shell-derived activated carbon(F-MNSAC)exhibits a remarkable compaction density of 0.64 g cm-3,an electrical conductivity of 3.34 S mm-1,and a substantial pore volume of1.213 m3g-1.The supercapacitor based on F-MNSAC delivers a higher specific capacitance(33.63 F g-1at 1 A g-1)than commercialized YP-50F(~27 F g-1at 1 A g-1),and outstanding rate capability(86.6%capacity retention at 50 A g-1).Consequently,the device achieves a high energy density of24.1 Wh kg-1at a high power density of 61.2 kW kg-1.This work establishes a new paradigm for developing high-performance carbon materials and lays a firm technological foundation for advancing nextgeneration,high-power supercapacitors. 展开更多
关键词 Biomass-derived carbon Difluorocarbene grafting Gas-solid reaction High-power supercapacitors Electron density redistribution
暂未订购 下载PDF
Dual Structure Reinforces Interfacial Polarized MXene/PVDF-TrFE Piezoelectric Nanocomposite for Pressure Monitoring 认领 引用 被引量：5
2
作者 Yong Ao Long Jin +10 位作者 Shenglong Wang Bolin Lan Guo Tian Tianpei Xu Longchao Huang Zihan Wang Yue Sun Tao Yang Weili Deng Fan Yang Weiqing Yang 《Nano-Micro Letters》 SCIE EI CAS CSCD 2025年第12期526-539,共14页
The emerging interfacial polarization strategy exhibits applicative potential in piezoelectric enhancement.However,there is an ongoing effort to address the inherent limitations arising from charge bridging phenomena ... The emerging interfacial polarization strategy exhibits applicative potential in piezoelectric enhancement.However,there is an ongoing effort to address the inherent limitations arising from charge bridging phenomena and stochastic interface disorder that plague the improvement of piezoelectric performance.Here,we report a dual structure reinforced MXene/PVDF-TrFE piezoelectric composite,whose piezoelectricity is enhanced under the coupling effect of interfacial polarization and structural design.Synergistically,molecular dynamics simulations,density functional theory calculations and experimental validation revealed the details of interfacial interactions,which promotes the net spontaneous polarization of PVDF-TrFE from the 0.56 to 31.41 Debye.The oriented MXene distribution and porous structure not only tripled the piezoelectric response but also achieved an eightfold increase in sensitivity within the low-pressure region,along with demonstrating cyclic stability exceeding 20,000 cycles.The properties reinforcement originating from dual structure is elucidated through the finite element simulation and experimental validation.Attributed to the excellent piezoelectric response and deep learning algorithm,the sensor can effectively recognize the signals of artery pulse and finger flexion.Finally,a 3×3 sensor array is fabricated to monitor the pressure distribution wirelessly.This study provides an innovative methodology for reinforcing interfacial polarized piezoelectric materials and insight into structural designs. 展开更多
关键词 Piezoelectric composite MXene/PVDF-TrFE Interfacial polarization Structural engineering
暂未订购 下载PDF
Piezotronic Sensor for Bimodal Monitoring of Achilles Tendon Behavior 认领 引用 被引量：4
3
作者 Zihan Wang Shenglong Wang +7 位作者 Boling Lan Yue Sun Longchao Huang Yong Ao Xuelan Li Long Jin Weiqing Yang Weili Deng 《Nano-Micro Letters》 SCIE EI CAS CSCD 2025年第10期328-339,共12页
Bimodal pressure sensors capable of simultaneously detecting static and dynamic forces are essential to medical detection and bio-robotics.However,conventional pressure sensors typically integrate multiple operating m... Bimodal pressure sensors capable of simultaneously detecting static and dynamic forces are essential to medical detection and bio-robotics.However,conventional pressure sensors typically integrate multiple operating mechanisms to achieve bimodal detection,leading to complex device architectures and challenges in signal decoupling.In this work,we address these limitations by leveraging the unique piezotronic effect of Y-ion-doped ZnO to develop a bimodal piezotronic sensor(BPS)with a simplified structure and enhanced sensitivity.Through a combination of finite element simulations and experimental validation,we demonstrate that the BPS can effectively monitor both dynamic and static forces,achieving an on/off ratio of 1029,a gauge factor of 23,439 and a static force response duration of up to 600 s,significantly outperforming the performance of conventional piezoelectric sensors.As a proof-of-concept,the BPS demonstrates the continuous monitoring of Achilles tendon behavior under mixed dynamic and static loading conditions.Aided by deep learning algorithms,the system achieves 96%accuracy in identifying Achilles tendon movement patterns,thus enabling warnings for dangerous movements.This work provides a viable strategy for bimodal force monitoring,highlighting its potential in wearable electronics. 展开更多
关键词 Piezotronic sensor ZnO nanorods Y-ion doping Bimodal detection Achilles tendon monitoring
暂未订购 下载PDF
From high-yield Ti3AlCN ceramics to high-quality Ti3CNTx MXenes through eliminating Al segregation 认领 引用 被引量：7
4
作者 Ningjun Chen Haichao Huang +8 位作者 Zhong Xu Yanting Xie Da Xiong Xiang Chu Bingni Gu Bo Zheng Weili Deng Haitao Zhang Weiqing Yang 《Chinese Chemical Letters》 SCIE CAS CSCD 2020年第4期1044-1048,共5页
Ti3CNTx MXenes with unique electrical conductivity can be widely applied for supercapacitors and electromagnetic shielding.However,its relatively low-yield quaternary nitrogen-containing Ti3AlCN ce ramics precursor(le... Ti3CNTx MXenes with unique electrical conductivity can be widely applied for supercapacitors and electromagnetic shielding.However,its relatively low-yield quaternary nitrogen-containing Ti3AlCN ce ramics precursor(less than 50%),due to the inevitable Al segregation during the synthesizing process,significantly hindered its widely commercial applications.Herein,we employed the controllable AlNoversaturation precursor strategy to precisely tune the phase transition point of quaternary Ti3AlCN ceramics to obtain high-yield Ti3 AlCN precursor for the purpose of high conductivity Ti3 CNTx MXenes.Combined energy dispersive X-ray spectrometer(XRD)with X-ray photoelectron spectroscopy(XPS)characterizations,the yield of the quaternary nitrogen-containing Ti3 AlCN ceramics was evidently proved to be up to 70%,which is 1.4 times than that of previously reported works.Such relatively highyield quaternary Ti3AlCN is mainly ascribed to the elimination of Al segregation.Based on it,we further developed accordion-like two-dimensional(2D)MXene via hydrofluoric acid etch and vacuum freezedry.This novel accordion-like 2D Ti3CNTx MXene possesses high electrochemical capacitive properties(209 F/g).Therefore,this controllable AlN-oversaturation precursor strategy will pave a way to exploit costly high-yield MAX ceramics precursor for high conductivity MXenes and also play a powerful role in promoting their practical applications including electrical and magnetic engineering fields. 展开更多
关键词 Al segregation High-yield Ti3AlCN MAX phase Ti3CNTx MXenes Supercapacitors
暂未订购 下载PDF
NH3‑Induced In Situ Etching Strategy Derived 3D‑Interconnected Porous MXene/Carbon Dots Films for High Performance Flexible Supercapacitors 认领 引用 被引量：8
5
作者 Yongbin Wang Ningjun Chen +6 位作者 Bin Zhou Xuefeng Zhou Ben Pu Jia Bai Qi Tang Yan Liu Weiqing Yang 《Nano-Micro Letters》 SCIE EI CAS CSCD 2023年第12期271-282,共12页
2D MXene(Ti3CNTx)has been considered as the most promising electrode material for flexible supercapacitors owing to its metallic conductivity,ultra-high capacitance,and excellent flexibility.However,it suffers f... 2D MXene(Ti3CNTx)has been considered as the most promising electrode material for flexible supercapacitors owing to its metallic conductivity,ultra-high capacitance,and excellent flexibility.However,it suffers from a severe restacking problem during the electrode fabrication process,limiting the ion transport kinetics and the accessibility of ions in the electrodes,especially in the direction normal to the electrode surface.Herein,we report a NH3-induced in situ etching strategy to fabricate 3D-interconnected porous MXene/carbon dots(p-MC)films for high-performance flexible supercapacitor.The pre-intercalated carbon dots(CDs)first prevent the restacking of MXene to expose more inner electrochemical active sites.The partially decomposed CDs generate NH3for in situ etching of MXene nanosheets toward 3D-interconnected p-MC films.Benefiting from the structural merits and the 3D-interconnected ionic transmission channels,p-MC film electrodes achieve excellent gravimetric capacitance(688.9 F g-1at 2 A g-1)and superior rate capability.Moreover,the optimized p-MC electrode is assembled into an asymmetric solid-state flexible supercapacitor with high energy density and superior cycling stability,demonstrating the great promise of p-MC electrode for practical applications. 展开更多
关键词 Ti3CNTxMXene Carbon dots In situ etching 3D-interconnected porous structure Flexible supercapacitors
暂未订购 下载PDF
Boosting High-Voltage Dynamics Towards High-Energy-Density Lithium-Ion Capacitors 认领 引用 被引量：7
6
作者 Junfeng Huang Xin Lu +9 位作者 Teng Sun Daiyao Yu Zhong Xu Yanting Xie Xinglin Jiang Yongbin Wang Shenglong Wang Xiong Zhang Weiqing Yang Haitao Zhang 《Energy & Environmental Materials》 SCIE EI CAS CSCD 2023年第4期211-217,共7页
Lithium-ion capacitors(LICs)are becoming important electrochemical energy storage systems due to their great potential to bridge the gap between supercapacitors and lithium-ion batteries.However,capacity lopsidedness ... Lithium-ion capacitors(LICs)are becoming important electrochemical energy storage systems due to their great potential to bridge the gap between supercapacitors and lithium-ion batteries.However,capacity lopsidedness and low output voltage greatly hinder the realization of high-energy-density LICs.Herein,a strategy of balancing capacity towards fastest dynamics is proposed to enable high-voltage LICs.Through electrochemical prelithiation of Nb2C to be 1.1 V with 165 mAh g-1,Nb2C//LiFePO4 LICs show a broadened potential window from 3.0 to 4.2 V and an according high energy density of 420 Wh kg-1.Moreover,the underlying mechanism between prelithiation and high voltage is disclosed by electrochemical dynamic analysis.Prelithiation declines the Nb2C anode potential that facilitates electron transmission in the interlayer of two-dimensional Nb2C MXene.This effect induces small drive force for Li+ions deposition and hence weakens the repulsive force from adsorbed ions on the electrode surface.Benefiting from even more Li+ions deposition,a higher voltage is eventually delivered.In addition,prelithiation significantly increases Coulomb efficiency of the 1st cycle from 74%to 90%,which is crucial to commercial application of LICs. 展开更多
关键词 electrochemical dynamics high voltage lithium-ion capacitors Nb2C MXene prelithiation
暂未订购 下载PDF
Effects of local matrix environment on the spectroscopic properties of ensemble to single-particle level carbon dots 认领 引用 被引量：3
7
作者 Zhihong Wei Boyang Wang +6 位作者 Mingcai Xie Daocheng Hong Xin Yang Sushu Wan Weiqing Yang Siyu Lu Yuxi Tian 《Chinese Chemical Letters》 SCIE CAS CSCD 2022年第2期751-756,共6页
Carbon dots(CDs), because of their unique properties, are being rapidly developed as important luminescent materials for imaging, sensing, and use in photonic devices. However, most of the reported fundamental propert... Carbon dots(CDs), because of their unique properties, are being rapidly developed as important luminescent materials for imaging, sensing, and use in photonic devices. However, most of the reported fundamental properties of the CDs are results of investigations conducted in the solution state, which may be completely different from those conducted in the solid state. In this work, we study the luminescence properties, photostability, and the dynamics of CDs in different matrix environments, from ensemble to the single-particle level. We observed that the properties associated with the emission centers and photostability of CDs were extremely sensitive to the local chemical environment. A better understanding of the dependence of the spectroscopic properties of CDs on the complex local chemical environment is an important step toward finding new ways of controlling the optical properties of CDs and optimizing their use in various applications. 展开更多
关键词 Carbon dots Matrix effects Single-particle Photostability Blinking
暂未订购 下载PDF
Low-Enthalpy and High-Entropy Polymer Electrolytes for Li-Metal Battery 认领 引用 被引量：3
8
作者 Haitao Zhang Yuchen Wang +6 位作者 Junfeng Huang Wen Li Xiankan Zeng Aili Jia Hongzhi Peng Xiong Zhang Weiqing Yang 《Energy & Environmental Materials》 SCIE EI CAS CSCD 2024年第1期91-99,共9页
lonic-conductive solid-state polymer electrolytes are promising for the development of advanced lithium batteries yet a deeper understanding of their underlying ion-transfer mechanism is needed to improve performance.... lonic-conductive solid-state polymer electrolytes are promising for the development of advanced lithium batteries yet a deeper understanding of their underlying ion-transfer mechanism is needed to improve performance.Here we demonstrate the low-enthalpy and high-entropy(LEHE)electrolytes can intrinsically generate remarkably free ions and high mobility,enabling them to efficiently drive lithium-ion storage.The LEHE electrolytes are constructed on the basis of introducing CsPbl3perovskite quantum dots(PQDs)to strengthen PEO@LiTFSI complexes.An extremely stable cycling>1000 h at 0.3 mA cm-2can be delivered by LEHE electrolytes.Also,the as-developed Li|LEHE|LiFePO4cell retains 92.3%of the initial capacity(160.7 mAh g-1)after 200 cycles.This cycling stability is ascribed to the suppressed charge concentration gradient leading to free lithium dendrites.It is realized by a dramatic increment in lithium-ion transference number(0.57 vs 0.19)and a significant decline in ion-transfer activation energy(0.14 eV vs 0.22 eV)for LEHE electrolytes comparing with PEO@LiTFSI counterpart.The CsPbl3PQDs promote highly structural disorder by inhibiting crystallization and hence endow polymer electrolytes with low melting enthalpy and high structural entropy,which in turn facilitate long-term cycling stability and excellent rate-capability of lithium-metal batteries. 展开更多
关键词 charge concentration gradient lithium dendrites lithium-metal battery low-enthalpy and high-entropy polymer electrolyte
暂未订购 下载PDF
Viability of all-solid-state lithium metal battery coupled with oxide solid-state electrolyte and high-capacity cathode 认领 引用 被引量：1
9
作者 Xingxing Jiao Xieyu Xu +6 位作者 Yongjing Wang Xuyang Wang Yaqi Chen Shizhao Xiong Weiqing Yang Zhongxiao Song YangYang Liu 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2024年第4期122-131,共10页
Owing to the utilization of lithium metal as anode with the ultrahigh theoretical capacity density of 3860 mA h g-1and oxide-based ceramic solid-state electrolytes(SE),e.g.,garnet-type Li7La3Zr2O12(LLZO),a... Owing to the utilization of lithium metal as anode with the ultrahigh theoretical capacity density of 3860 mA h g-1and oxide-based ceramic solid-state electrolytes(SE),e.g.,garnet-type Li7La3Zr2O12(LLZO),all-state-state lithium metal batteries(ASLMBs)have been widely accepted as the promising alternatives for providing the satisfactory energy density and safety.However,its applications are still challenged by plenty of technical and scientific issues.In this contribution,the co-sintering temperature at 500℃is proved as a compromise method to fabricate the composite cathode with structural integrity and declined capacity fading of LiNi0.5Co0.2Mn0.3O2(NCM).On the other hand,it tends to form weaker grain boundary(GB)inside polycrystalline LLZO at inadequate sintering temperature for LLZO,which can induce the intergranular failure of SE during the growth of Li filament inside the unavoidable defect on the interface of SE.Therefore,increasing the strength of GB,refining the grain to 0.4μm,and precluding the interfacial defect are suggested to postpone the electro-chemo-mechanical failure of SE with weak GB.Moreover,the advanced sintering techniques to lower the co-sintering temperature for both NCM-LLZO composite cathode and LLZO SE can be posted out to realize the viability of state-of-the-art ASLMBs with higher energy density as well as the guaranteed safety. 展开更多
关键词 All-solid-state lithium metal battery LiNi0.5Co0.2Mn0.3O2-Li7La3Zr2O12composite cathode Co-sintering Lithium metal anode Electro-chemo-mechanical failure
暂未订购 下载PDF
Synthesis of Size-Controllable NiCo2S4 Hollow Nanospheres Toward Enhanced Electrochemical Performance 认领 引用 被引量：4
10
作者 Lei Zhang Haitao Zhang +3 位作者 Xiang Chu Fangyan Liu Chunsheng Guo Weiqing Yang 《Energy & Environmental Materials》 SCIE EI CAS 2020年第3期421-428,共8页
Although the synthesis of novel nanostructured metal sulfides has been well established,further size-controllable optimization is still valuable to enhance their performance for various applications.Herein,a self-temp... Although the synthesis of novel nanostructured metal sulfides has been well established,further size-controllable optimization is still valuable to enhance their performance for various applications.Herein,a self-template method to size-controllably synthesize the hollow NiCo2S4 nanospheres is reported.Uniformly monodisperse Ni Co precursors with diameter widely ranging from 97 to 550 nm are controllably synthesized and subsequently transformed into hollow NiCo2S4 nanospheres through in situ sulfidation.Smaller nanoparticles’diameter results in the hollow NiCo2S4 nanospheres larger surface area and thinner shell thickness and hence provides much more electrochemical active sites as well as facilitate the ion and electron transfer.Consequently,the hollow NiCo2S4 nanospheres—used as the electrode materials in supercapacitors—achieve 19%enhancement of specific capacity from 484.8 to 575.1 C g-1 through lowering the 42.5%diameter of hollow NiCo2S4 nanospheres from 407 to 234 nm.Moreover,the hollow NiCo2S4 nanospheres with 234 nm diameter exhibit superior rate capacity indicated by 49%capacity retention from 1 to 50 A g-1 and excellent cycling stability(77%after 2000 cycles).Furthermore,this method is a potentially general strategy in the size-controllable synthesis of the metal sulfides hollow nanostructures and results in the remarkable electrochemical applications. 展开更多
关键词 nickel-cobalt sulfides self-template method size-controllable supercapacitor
暂未订购 下载PDF
关于大学数学课程中概念教学的思考 认领 引用
11
作者 陈广锋 杨渭清 胡洪萍 《教育进展》 2018年第3期269-272,共4页
数学概念教学是数学课程教学中的重要环节,是基础知识和基本技能教学的重要因素。本文通过概念的背景介绍、通俗化理解转变数学语言、数学概念准确重述、利用概念验证问题和相关概念比较等五个方面阐述了对大学数学概念教学的思考。
关键词 数学概念 培养目标 创新 教学
暂未订购 下载PDF
不同层数石墨烯的光热显微成像 认领 引用 被引量：2
12
作者 都安邦 王源璠 +7 位作者 魏志弘 张东旭 李理 杨炜青 孙千璐 赵丽丽 徐伟高 田玉玺 《物理化学学报》 SCIE CAS CSCD 北大核心 2024年第5期55-59,共5页
二维层状材料(石墨烯、二维过渡金属硫族化合物等)因具有独特的物理性质,引起了研究学者们的广泛关注,极大促进了化学、材料科学和凝聚态物理学的发展。开发能够探究层状材料中层数依赖的光学、电学、力学和热学特性的新技术一直是二维... 二维层状材料(石墨烯、二维过渡金属硫族化合物等)因具有独特的物理性质,引起了研究学者们的广泛关注,极大促进了化学、材料科学和凝聚态物理学的发展。开发能够探究层状材料中层数依赖的光学、电学、力学和热学特性的新技术一直是二维材料领域最活跃的研究方向之一。光热显微镜利用光激发后非辐射跃迁产生的热效应,可实现在单个颗粒或单分子水平上成像与检测,并实时捕捉微观尺度热弛豫和热传输过程。本文对比研究了石墨烯薄片在不同光热介质(空气、甘油)中随厚度变化的光热特性,发现了在两种介质中光热信号强度与样品厚度之间均存在非线性依赖关系。相比于空气介质,甘油介质中光热信号强度具有更高的对比度,且随着厚度增加表现出非单调变化。该研究提供了不同介质环境中不同层数石墨烯光吸收和热弛豫特征的细节信息,相关研究结论将为层状材料及其异质结的热学性质研究提供依据。 展开更多
关键词 石墨烯 光热显微成像 层数依赖 光吸收 非辐射弛豫
暂未订购 下载PDF
Transition frequencies between 2S and 2P states of lithium-like ions 认领 引用
13
作者 王黎明 刘仝彤 +1 位作者 杨为青 Zong-Chao Yan 《Chinese Physics B》 SCIE EI CAS CSCD 2023年第3期8-13,共6页
The Schrödinger equation for the 2S and 2P states of the lithium-like ions Z=5–7,9–10 is solved by using the Rayleigh-Ritz variational method in Hylleraas coordinates.The leading-order relativistic and QED corr... The Schrödinger equation for the 2S and 2P states of the lithium-like ions Z=5–7,9–10 is solved by using the Rayleigh-Ritz variational method in Hylleraas coordinates.The leading-order relativistic and QED corrections are calculated perturbatively and higher-order corrections are estimated.The transition frequencies between the 2S1/2and 2PJ(J=1/2,3/2)states are determined and compared with experimental and other theoretical results.Specifically,isotope shifts are also calculated for B2+. 展开更多
关键词 Li-like ions transition frequency relativistic corrections QED corrections
暂未订购 下载PDF
Low electric field-driven and fast-moving relaxor ferroelectric soft robots 认领 引用
14
作者 Longchao Huang Weili Deng +11 位作者 Guo Tian Yue Sun Tao Yang Boling Lan Xuelan Li Yang Liu Tianpei Xu Shenglong Wang Yong Ao Jieling Zhang Long Jin Weiqing Yang 《InfoMat》 SCIE CSCD 2025年第6期75-87,共13页
Bioinspired soft robots hold great potential to perform tasks in unstructured terrains.Ferroelectric polymers are highly valued in soft robots for their flexibility,lightweight,and electrically controllable deformatio... Bioinspired soft robots hold great potential to perform tasks in unstructured terrains.Ferroelectric polymers are highly valued in soft robots for their flexibility,lightweight,and electrically controllable deformation.However,achieving large strains in ferroelectric polymers typically requires high driving voltages,posing a significant challenge for practical applications.In this study,we investigate the role of crystalline domain size in enhancing the electrostrain performance of the relaxor ferroelectric polymer poly(vinylidene fluoride-trifluoroethylene-chlorofluoroethylene-fluorinated alkynes)(P(VDFTrFE-CFE-FA)).Leveraging its remarkable inverse piezoelectric coefficient(|d33*|=701 pm V-1),we demonstrate that the planar films exhibit a five times larger bending angle than that of commercial PVDF films at low electric fields.Based on this material,we design a petal-structured soft robot that achieves a curvature of up to 4.5 cm-1 at a DC electric field of 30 Vμm-1.When integrated into a bipedal soft robot,it manifests outstanding electrostrain performance,achieving rapid locomotion of~19 body lengths per second(BL s-1)at 10 Vμm-1(560 Hz).Moreover,the developed robot demonstrates remarkable abilities in climbing slopes and carrying heavy loads.These findings open new avenues for developing low-voltage-driven soft robots with significant promise for practical applications. 展开更多
关键词 domain design electrostrain relaxor ferroelectric polymer soft robot
Harvesting vibration energy by a triple-cantilever based triboelectric nanogenerator 认领 引用 被引量：27
15
作者 Weiqing Yang Jun Chen +5 位作者 Guang Zhu Xiaonan Wen Peng Bai Yuanjie Su Yuan Lin Zhonglin Wang 《Nano Research》 SCIE CSCD 2013年第12期880-886,共7页
Triboelectric nanogenerators （TENG）, a unique technology for harvesting ambient mechanical energy based on triboelectric effect, have been proven to be a cost-effective, simple and robust approach for self-powered s... Triboelectric nanogenerators （TENG）, a unique technology for harvesting ambient mechanical energy based on triboelectric effect, have been proven to be a cost-effective, simple and robust approach for self-powered systems. Here, we demonstrate a rationally designed triple-cantilever based TENG for harvesting vibration energy. With the assistance of nanowire arrays fabricated onto the surfaces of beryllium-copper alloy foils, the newly designed TENG produces an open-circuit voltage up to 101 V and a short-circuit current of 55.7 ~tA with a peak power density of 252.3 mW/m2. The TENG was systematically investigated and demonstrated as a direct power source for instantaneously lighting up 40 commercial light-emitting diodes. For the first time, a TENG device has been designed for harvesting vibration energy, especially at low frequencies, opening its application as a new energy technologv. 展开更多
关键词 triboelectric nanogenerator harvesting vibration energy triple-cantilever self-powered systems
暂未订购 下载PDF
Spatially Confined MXene/PVDF Nanofiber Piezoelectric Electronics 认领 引用 被引量：17
16
作者 Jieling Zhang Tao Yang +10 位作者 Guo Tian Boling Lan Weili Deng Lihua Tang Yong Ao Yue Sun Wanghong Zeng Xiarong Ren Zhaoyu Li Long Jin Weiqing Yang 《Advanced Fiber Materials》 SCIE EI CAS 2024年第1期133-144,共12页
Piezoelectric nanofibers have received extensive attention in the field of electronic devices,but they are still restricted for further development,due to their limited dipole arrangement.Herein,we propose spatially c... Piezoelectric nanofibers have received extensive attention in the field of electronic devices,but they are still restricted for further development,due to their limited dipole arrangement.Herein,we propose spatially confined MXene/polyvinylidene fluoride(PVDF)nanofibers for piezoelectric application,with dual functions of pressure sensing and energy harvesting.The spatial confinement of MXene/PVDF nanofibers can actively induce the optimally aligned-CH2-/-CF2-dipoles of PVDF and dramatically boost spontaneous polarization for piezoelectric enhancement.The voltage and current generated by fabricated MXene/PVDF(0.8 wt%)nanofiber piezoelectric electronic devices are respectively 3.97 times and 10.1 times higher than those generated by pure PVDF nanofibers.Based on these results,the developed bifunctional electronic devices are applied to monitor various human movements and to harvest energy.Notably,the results of this work allow for the development of nanofibers with excellent piezoelectric performance using a spatial confinement mechanism. 展开更多
关键词 Piezoelectric nanofibers Electrospinning Confined structure PVDF MXene
MXene based mechanically and electrically enhanced film for triboelectric nanogenerator 认领 引用 被引量：11
17
作者 Yuyu Gao Guoxu Liu +7 位作者 Tianzhao Bu Yaoyao Liu Youchao Qi Yanting Xie Shaohang Xu Weili Deng Weiqing Yang Chi Zhang 《Nano Research》 SCIE EI CSCD 2021年第12期4833-4840,共8页
The development of triboelectric nanogenerator(TENG)technology which can directly convert ambient mechanical energy into electric energy may affect areas from green energy harvesting to emerging wearing electronics.An... The development of triboelectric nanogenerator(TENG)technology which can directly convert ambient mechanical energy into electric energy may affect areas from green energy harvesting to emerging wearing electronics.And,the material of triboelectric layer is critical to the mechanical robustness and electrical output characteristics of the TENGs.Herein,a MXene enhanced electret polytetrafluoroethylene(PTFE)film with a high mechanical property and surface charge density is developed.The MXene/PTFE composite film was synthesized by spraying and annealing treatment.With the doping of MXene,the crystallinity of composite film could be tuned,leading to an enhancement in the tensile property of 450%and reducing the wear volume about 80%in the friction test.Furthermore,the as-fabricated TENG with this composite film outputs 397 V of open-circuit voltage,21µA of short-circuit current,and 232 nC of transfer charge quantity,which are 4,6,and 6 times higher than that of the TENG made by pure PTFE film,respectively.Therefore,this work provides a creative strategy to simultaneously improve the mechanical property and electrical performance of the TENGs,which have great potential in improving device stability under a complex mechanical environment. 展开更多
关键词 MXene polytetrafluoroethylene(PTFE) mechanically and electrically enhanced triboelectric layer triboelectric nanogenerator
暂未订购 下载PDF
Body-area sensor network featuring micropyramids for sports healthcare 认领 引用 被引量：8
18
作者 Shenglong Wang Weili Deng +9 位作者 Tao Yang Guo Tian Da Xiong Xiao Xiao Hongrui Zhang Yue Sun Yong Ao Junfeng Huang Jun Chen Weiqing Yang 《Nano Research》 SCIE EI CSCD 2023年第1期1330-1337,共8页
Monitoring physiological signals of the human body can provide extremely important information for sports healthcare,preventing injuries and providing efficient guidance for individual sports.However,the signals relat... Monitoring physiological signals of the human body can provide extremely important information for sports healthcare,preventing injuries and providing efficient guidance for individual sports.However,the signals related to human healthcare involve both subtle and vigorous signals,making it difficult for a sensor to satisfy the full-scale monitoring at the same time.Here,a novel conductive elastomer featuring homogeneously micropyramid-structured PDMS/CNT composite is used to fabricate highperformance piezoresistive sensors by a drop-casting method.Benefiting from the significant increase in the contact area of microstructure during deformation,the flexible sensor presents a broad detection range(up to 185.5 kPa),fast responseecovery time(44/13 ms),ultrahigh sensitivity(242.4 kPa–1)and excellent durability over 8,000 cycles.As a proof of concept,the as-fabricated pressure sensor can be used for body-area sports healthcare,and enable the detection of full-scale pressure distribution.Considering the fabulous sensing performance,the sensor may potentially become promising in personal sports healthcare and telemedicine monitoring. 展开更多
关键词 pressure sensor pyramidal microstructure sports healthcare sensor network broad detection range high sensitivity
暂未订购 下载PDF
A Highly Sensitive Coaxial Nanofiber Mask for Respiratory Monitoring Assisted with Machine Learning 认领 引用 被引量：7
19
作者 Boling Lan Cheng Zhong +9 位作者 Shenglong Wang Yong Ao Yang Liu Yue Sun Tao Yang Guo Tian Longchao Huang Jieling Zhang Weili Deng Weiqing Yang 《Advanced Fiber Materials》 SCIE EI CAS 2024年第5期1402-1412,共11页
Respiration is a critical physiological process of the body and plays an essential role in maintaining human health.Wearable piezoelectric nanofiber-based respiratory monitoring has attracted much attention due to its... Respiration is a critical physiological process of the body and plays an essential role in maintaining human health.Wearable piezoelectric nanofiber-based respiratory monitoring has attracted much attention due to its self-power,high linearity,noninvasiveness,and convenience.However,the limited sensitivity of conventional piezoelectric nanofibers makes it difficult to meet medical and daily respiratory monitoring requirements due to their low electromechanical conversion efficiency.Here,we present a universally applicable,highly sensitive piezoelectric nanofiber characterized by a coaxial composite structure of polyvinylidene fluoride(PVDF)and carbon nanotube(CNT),which is denoted as PS-CC.Based on elucidating the enhancement mechanism from the percolation effect,PS-CC exhibits excellent sensing performance with a high sensitivity of 3.7 V/N and a fast response time of 20 ms for electromechanical conversion.As a proof-of-concept,the nanofiber membrane is seamlessly integrated into a facial mask,facilitating accurate recognition of respiratory states.With the assistance of a one-dimensional convolutional neural network(CNN),a PS-CC-based smart mask can recognize respiratory tracts and multiple breathing patterns with a classification accuracy of up to 97.8%.Notably,this work provides an effective strategy for monitoring respiratory diseases and offers widespread utility for daily health monitoring and clinical applications. 展开更多
关键词 PVDF/CNT Coaxial nanofiber High-sensitivity Smart mask Machine learning Respiratory monitoring
Boosting the energy density of aqueous MXene-based supercapacitor by integrating 3D conducting polymer hydrogel cathode 认领 引用 被引量：9
20
作者 Xiang Chu Yihan Wang +8 位作者 Lucheng Cai Haichao Huang Zhong Xu Yanting Xie Cheng Yan Qing Wang Haitao Zhang Hong Li Weiqing Yang 《SusMat》 2022年第3期379-390,共12页
The wide-spread proliferation of aqueous MXene-based supercapacitor has been largely shadowed by the limited cell potential window(typically in the range of 0-0.6 V).To address this baffling issue,designing asymmetric... The wide-spread proliferation of aqueous MXene-based supercapacitor has been largely shadowed by the limited cell potential window(typically in the range of 0-0.6 V).To address this baffling issue,designing asymmetric supercapacitor(ASC)is proposed as a rational strategy to enlarge the potential window(thus energy density)of individual cell in aqueous electrolytes.To this date,however,it still remains a great challenge to develop easy fabricating,3D nanostructured,and pseudocapacitive cathode materials that can perfectly match with MXene anodematerials.In this work,we propose a supramolecular strategy to construct conducting polymer hydrogel(CPH)with highly interconnected 3D nanostructures and large pseudocapacitance,which can finely match with 2D Ti3C2Tx.The as-assembled CPH//Ti3C2Tx ASCwith CPH cathode and MXene anode can operate in a broadened potential window of 1.15 V in aqueous PVA/H2SO4 gel electrolyte with remarkably improved energy density of 16.6μWh/cm2(nine times higher than that of symmetric MXene supercapacitor).Additionally,this ASC exhibits outstanding cyclic stability with no trackable performance decay over 30,000 galvanostatic charge and discharge cycles.It is demonstrated in this work that employing positive CPH electrode is a feasible yet promising strategy to enhance the potential window and energy density of aqueous MXene supercapacitors. 展开更多
关键词 conducting polymer hydrogel electrochemical energy storage electrochemical polymerization high energy density MXene
已选0条
引用分析
参考文献
引证文献
 统计分析
检索结果
已选文献
上一页 1 2 下一页 到第 页
在线咨询 使用帮助 返回顶部 意见反馈