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Reconstruction of lithium replenishment channel with an amorphous structure for efficient regeneration of spent LiCoO2 cathodes 认领 引用 被引量：1
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作者 Yang Cao Junfeng Li +4 位作者 Haotian Qu Haocheng Ji Lingshu Li Xijun Wei Guangmin Zhou 《Energy Materials and Devices》 2025年第1期108-117,107,共10页
Lithium-ion batteries with LiCoO2(LCO)cathodes are widely used in various electronic devices,resulting in a large amount of spent LCO(SLCO).Therefore,there is an urgent need for an efficient technique for recycling... Lithium-ion batteries with LiCoO2(LCO)cathodes are widely used in various electronic devices,resulting in a large amount of spent LCO(SLCO).Therefore,there is an urgent need for an efficient technique for recycling SLCO.However,due to the presence of cobalt oxide with a spinel phase on the surface of highly-degraded LCO,the strong electrostatic repulsion from the transition metal octahedron poses a high Li replenishment barrier,making the regeneration of highly-degraded LCO a challenge.Herein,we propose a structural transformation strategy for reconstructing Li replenishment channels to aid the direct regeneration of highly-degraded LCO.In this approach,ball milling is employed to disrupt the inherent structure of highly-degraded LCO,thereby releasing the internal stress and converting the surface spinel phase into a homogeneous amorphous structure,which promotes Li insertion and regeneration.The regenerated LCO(RLCO)exhibits an outstanding discharge capacity of 179.10 mAh·g−1 in the voltage range of 3.0–4.5 V at 0.5 C.The proposed strategy is an effective regeneration approach for highly-degraded LCO,thereby facilitating the efficient recycling of spent lithium-ion battery cathode materials. 展开更多
关键词 lithium-ion battery(LIB) amorphous structure ball milling regeneration
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Breaking Ordered Atomic Arrangement into Disordered Amorphous Structure for High Electrocatalytic Performance 认领 引用 被引量：1
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作者 Baoshun Zhang Yifu Yu 《Transactions of Tianjin University》 EI CAS 2025年第1期1-3,共3页
Noble metal-based intermetallic compounds(IMCs)with ordered atomic arrangements exhibit remarkable electrocatalytic activity owing to their unique crystal and electronic structures.During the past years,great advance ... Noble metal-based intermetallic compounds(IMCs)with ordered atomic arrangements exhibit remarkable electrocatalytic activity owing to their unique crystal and electronic structures.During the past years,great advance has been made in the development of noble metal-based IMCs.Recently,Lu and coworkers reported ultrathin“amorphous/intermetallic”(A/IMC)heterophase PtPbBi nanosheets(NSs)with a thickness of 2.5±0.3 nm.The oxidative etching effect caused by the coexistence of O2and Br-ions plays a crucial role in the formation of the IMC and unique two-dimensional structure with irregular shapes and curled edges.This study shows that fabricating an A/IMC heterophase structure with a multimetallic composition can effectively enhance the catalytic performances of noble metal-based electrocatalysts. 展开更多
关键词 Amorphous structure Electrocatalytic PtPbBi nanosheets
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Dual Cold Crystallization Kinetics of Heterogeneous Amorphous Structure in Poly(L-lactide)upon Extensional Flow 认领 引用
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作者 Jie Zhang Xin-Rui Gao +5 位作者 Zhi-Kang Ni De-Zhuang Jia Hao Lin Hua-Dong Huang Gan-Ji Zhong Zhong-Ming Li 《Chinese Journal of Polymer Science》 SCIE EI CAS CSCD 2025年第7期1231-1239,共9页
Poly(L-lactide)(PLLA),a leading biodegradable polyester,has demonstrated potential as a sustainable alternative,owing to its excellent biodegradability and rigidity.However,their slow crystallization kinetics and p... Poly(L-lactide)(PLLA),a leading biodegradable polyester,has demonstrated potential as a sustainable alternative,owing to its excellent biodegradability and rigidity.However,their slow crystallization kinetics and poor heat resistance limit their application scope.Recent advances have highlighted that the combination of extensional flow and thermal fields can achieve toughness–stiffness balance,high transparency,and good heat resistance.However,the effect of extensional flow on the post-non-isothermal crystallization of PLLA during heating and the resulting crystalline texture remains unclear.In this study,PLLA with a heterogeneous amorphous structure and oriented polymorph was prepared by extensional flow.The effect of heterogeneous amorphous structures on non-isothermal crystallization kinetics during the heating process was studied by thermal analysis,polarized optical microscopy,infrared spectroscopy,and ex situ/in situ X-ray characterization.These results clearly illustrate that extensional flow enhances the formation of oriented crystalline structures,accelerates non-isothermal crystallization,and modulates the polymorphic composition of PLLA.Moreover,an unexpected dual cold-crystallization behavior is identified in ordered PLLA samples upon extensional flow,which is from the extensional flow-induced heterogeneous amorphous phase into α' phase(low-temperature peak)and the pristine amorphous phase intoαphase(high-temperature peak).The extensional flow primarily promotes the formation of the more perfectαandα'phases,but has a negative effect on the final content ofαphase formed after cold crystallization andα'-to-αphase transformation.The findings of this work advance the understanding of PLLA non-isothermal crystallization after extensional flow and offer valuable guidance for high-performance PLLA upon heat treatment in practical processing. 展开更多
关键词 Poly(L-lactide) Extensional flow Heterogeneous amorphous structure Dual cold crystallization
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Reusable Shape-Memory Amorphous Structure Color Photonic Paper for Press Printing 认领 引用
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作者 Yu Miao Meixing Ai +3 位作者 Mingshuo Tang Zhiwei He Zhihao Wang Yunlong Wang 《Chinese Journal of Chemical Physics》 SCIE EI CAS CSCD 2025年第6期979-986,I0241,共8页
Rewritable structure color photonic paper is considered as an alternative to traditional papers and can significantly reduce the consumption of forest resources. However, traditional photonic crystal faces challenges ... Rewritable structure color photonic paper is considered as an alternative to traditional papers and can significantly reduce the consumption of forest resources. However, traditional photonic crystal faces challenges of low resolution and serious angle dependence. In this work, we present a novel rewritable structure color photonic paper combining press responsive materials and angle independent amorphous photonic papers, and achieve high-resolution printing by computer-programmed 3D-printed seals. The patterns printed on the photonic papers can be easily erased by water, and can be reused at least 8 times without any changes, and the printed pattern is stable and maintains its color for 30 days without fading. 展开更多
关键词 Rewritable paper Amorphous structure color Green printing Pressure-re-sponse Shape memory polymer
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Stabilizing molecular contacts via amorphous structures 认领 引用
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作者 Yongzhen Wu 《Science China Chemistry》 SCIE EI CAS CSCD 2025年第5期1637-1638,共2页
Perovskite solar cells(PSCs)have achieved remarkable advancements in recent years[1].Devices achieving high power conversion efficiencies(PCEs)typically rely on molecular contacts featuring conjugated cores[2].The pla... Perovskite solar cells(PSCs)have achieved remarkable advancements in recent years[1].Devices achieving high power conversion efficiencies(PCEs)typically rely on molecular contacts featuring conjugated cores[2].The planar and conjugated cores facilitate ordered molecular stacking throughπ-πinteractions,thereby enhancing charge transport and selectivity[3,4]. 展开更多
关键词 perovskite solar cells pscs perovskite solar cells ordered molecular stacking power conversion efficiencies molecular contacts molecular contacts featuring conjugated cores amorphous structures enhancing charge transport selectivity
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Fabrication of amorphous FeCoNiCuMnP x high-entropy phosphide/carbon composites with a heterostructured fusiform morphology for efficient oxygen evolution reaction 认领 引用 被引量：4
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作者 Yifan Zhou Longqing Gao +5 位作者 Haoyuan Chen Hao Wang Juan Zhang Xiumin Li Fangfang Duo Guoqing Guan 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2024年第1期62-70,共9页
Amorphous high-entropy materials with abundant defects,coordinatively unsaturated sites,and loosely bonded atoms could exhibit excellent electrocatalytic performance.However,how to fabricate such ma-terials with nanos... Amorphous high-entropy materials with abundant defects,coordinatively unsaturated sites,and loosely bonded atoms could exhibit excellent electrocatalytic performance.However,how to fabricate such ma-terials with nanostructure as well as amorphous structure is still full of challenges.In this work,high-entropy metal organic framework(HE-MOF)is employed as the self-sacrificial template to fabricate FeCoNiCuMnP x high-entropy phosphide/carbon(HEP/C)composites.The obtained composite shows a het-erostructured fusiform morphology,in which the HEP is encapsulated by a carbon layer,revealing high electron conductivity as well as rich catalytic active sites for oxygen evolution reaction(OER).Beside,it is found that there is a short-range ordered crystal structure in the amorphous phase,which is bene-ficial for revealing high OER catalytic activity as well as good stability.As a result,the optimum HEP/C composite shows an overpotential 239 mV@10 mA cm−2with a small Tafel slope of 72.5 mV dec−1 for catalyzing OER in alkaline solution. 展开更多
关键词 Water electrolysis Oxygen evolution reaction High-entropy MOFs High-entropy phosphides Amorphous structure
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A comparative study of the structure and crystallization of bulk metallic amorphous rod Pr60Ni30Al10 and melt-spun metallic amorphous ribbon Al87Ni10Pr3 认领 引用 被引量：2
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作者 孟庆格 李建国 周建坤 《Chinese Physics B》 CAS 2006年第7期1549-1557,共9页
Pr-based bulk metallic amorphous （BMA） rods （Pr60Ni30Al10） and Al-based amorphous ribbons （Al87Ni10Pr3） have been prepared by using copper mould casting and single roller melt-spun techniques, respectively. Ther... Pr-based bulk metallic amorphous （BMA） rods （Pr60Ni30Al10） and Al-based amorphous ribbons （Al87Ni10Pr3） have been prepared by using copper mould casting and single roller melt-spun techniques, respectively. Thermal parameters deduced from differential scanning calorimeter （DSC） indicate that the glass-forming ability （GFA） of Pr60Ni30Al10 BMA rod is far higher than that of Al87Ni10Pr3 ribbon. A comparative study about the differences in structure between the two kinds of glass-forming alloys, superheated viscosity and crystallization are also made. Compared with the amorphous alloy Al87Ni10Pr3, the BMA alloy Pr60Ni30Al10 shows high thermal stability and large viscosity, small diffusivity at the same superheated temperatures. The results of x-Ray diffraction （XRD） and transmission electron microscope （TEM） show the pronounced difference in structure between the two amorphous alloys. Together with crystallization results, the main structure compositions of the amorphous samples are confirmed. It seems that the higher the GFA, the more topological type clusters in the Pr-Ni-Al amorphous alloys, the GFAs of the present glass-forming alloys are closely related to their structures. 展开更多
关键词 Pr-Ni-Al amorphous alloys amorphous structure crystallization glass-forming ability （GFA）
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High efficiency conversion of low concentration nitrate boosted with amorphous Cu0nanorods prepared via in-situ reconstruction 认领 引用 被引量：1
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作者 Yunqing Zhu Kaiyue Wen +2 位作者 Xuequan Wan Gaigai Dong Junfeng Niu 《Chinese Chemical Letters》 SCIE CAS CSCD 2025年第6期612-617,共6页
Electrocatalytic nitrate reduction reaction(NO3-RR)is a green and competitive method for removing nitrate from water,requiring highly active and long-term stable electrocatalysts.In this work,we report a Cu0n... Electrocatalytic nitrate reduction reaction(NO3-RR)is a green and competitive method for removing nitrate from water,requiring highly active and long-term stable electrocatalysts.In this work,we report a Cu0nanorod catalyst with disordered structure(re-Cu NRs),prepared by electrochemical in situ reconfiguration of copper-based nitrides(Cu3N NRs).The amorphous structure allows the exposure of abundant active sites to enhance the electrocatalytic activity because of the disordered atomic arrangement.At a potential of-1.2 V vs.Ag/Ag Cl,the re-Cu NRs catalyst achieved nearly 100%nitrate conversion within 120 min at a low nitrate concentration(50 mg/L),without the accumulation of nitrite.Insitu DEMS detection reveals that the NO3-RR on re-Cu NRs followed the pathway of*NO3-→*NO2-→*NO→*N→*NH→*NH2→*NH3.Furthermore,combining this proposed pathway with electrochlorination could efficiently transform ammonia into harmless N2(~99.41%).Theoretical calculations confirm that the amorphous structure on the surface of re-Cu NRs catalysts can facilitate strongly adsorbed nitrate,weaken the rate-determining step of*NH3→NH3,and suppress hydrogen evolution reaction(HER).This study provides a new approach for designing efficient and stable amorphous catalysts for electrocatalytic nitrate reduction. 展开更多
关键词 Cu3N Electrochemical reconstruction Cu0nanorods Amorphous structure Electrochemical nitrate reduction
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Amorphous-rich RuMnOxaerogel with weakened Ru–O covalency for efficient acidic water oxidation 认领 引用 被引量：4
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作者 Tao Zhao Yunzhen Jia +7 位作者 Qiang Fang Runxin Du Genyan Hao Wenqing Sun Guang Liu Dazhong Zhong Jinping Li Qiang Zhao 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2025年第5期414-421,共8页
Ruthenium dioxide(RuO2)is one of the most promising acidic oxygen evolution reaction(OER)catalysts to replace the expensive and prevalent iridium(Ir)-based materials.However,the lattice oxygen oxidation induced Ru ... Ruthenium dioxide(RuO2)is one of the most promising acidic oxygen evolution reaction(OER)catalysts to replace the expensive and prevalent iridium(Ir)-based materials.However,the lattice oxygen oxidation induced Ru dissolution during OER compromises the activity and stability.Amorphous materials have been identified as a viable strategy to promote the stability of RuO2in acidic OER applications.This study reported a nanoporous amorphous-rich RuMnOx(A-RuMnOx)aerogel for efficient and stable acidic OER.Compared with highly crystalline RuMnOx,the weakened Ru–O covalency of A-RuMnOxby forming amorphous structure is favorable to inhibiting the oxidation of lattice oxygen.Meanwhile,this also optimizes the electronic structure of Ru sites from overoxidation and reduces the reaction energy barrier of the rate-determining step.As a result,A-RuMnOxaerogel exhibits an ultra-low overpotential of 145 mV at 10 mA cm-2and durability exceeding 100 h,as well as high mass activity up to 153 mA mg-1Ruat 1.5 V vs.reversible hydrogen electrode(RHE).This work provides valuable guidance for preparing highly active and stable Ru-based catalysts for acidic OER. 展开更多
关键词 Electrocatalyst A-RuMnOxaerogel Amorphous structure Covalency Acidic oxygen evolution reaction
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Amorphous Ce-Ti composite as an efficient bifunctional catalyst for deep oxidation of volatile organic compounds and selective catalytic reduction of NO 认领 引用 被引量：2
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作者 Pengfei Tu Hong Yao +6 位作者 Lei Song Yulong Wang Lei Yang Jinyan Xiao Ye Wang Shengwei Tang Wenxiang Tang 《Journal of Rare Earths》 SCIE EI CAS CSCD 2025年第8期1625-1634,I0002,共10页
In this work,a series of Ce-Ti composite oxides with different Ti/Ce molar ratios was prepared by coprecipitation method,and investigated for the catalytic degradation of toluene and selective catalytic reduction of N... In this work,a series of Ce-Ti composite oxides with different Ti/Ce molar ratios was prepared by coprecipitation method,and investigated for the catalytic degradation of toluene and selective catalytic reduction of NO.The phase transition process between Ce species and Ti species is limited by modulating the interaction between Ce4+and Ti4+,while a completely amorphous composite is generated with an appropriate molar ratio of Ti/Ce(1.5/1).The catalyst CeTi1.5Oxexhibits the best catalytic performance,where the values of T90and T50for deep degradation of toluene are 297 and 330℃respectively at high weight hours space velocity(WHSV=120000 mL/(g·h)).Compared with CeO2,T90and T50decrease by48 and 34℃respectively while declining by 67 and 70℃compared to TiO2.For the SCR reaction,CeTi1.5Oxreaches 100%NO conversion at 250℃with WHSV=60000 mL/(g·h),reduced by 50℃compared to pure CeO2.The amorphous nanostructure with highly dispersed Ce and Ti species was confirmed by transmission electron microscopy(TEM)and X-ray diffraction(XRD)characterizations.The X-ray photoelectron spectroscopy(XPS)and Raman analyses show that a large number of active Ce-O-Ti species and surface oxygen vacancies are generated due to the strong interaction between Ti4+and Ce4+in CeTi1.5Ox.Additionally,H2-TPR and O2-TPD further confirm that the interaction promotes the low-temperature reducibility and mobility of surface-active oxygen species.Meanwhile,in-situ DRIFTS study reveals that CeTi1.5Oxwith amorphous nanostructure can dramatically enhance the dissociative and complete oxidation capacity for toluene. 展开更多
关键词 Ce-Ti composite Toluene oxidation NOreduction Amorphous structure Synergetic effect Rareearths
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Amorphous ruthenium nanosheets for efficient hydrazine-assisted water splitting 认领 引用
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作者 Jiachuan He Haoran Wang +6 位作者 Chen Ling Yi Shi Haohui Hu Qi Jin Shi Zhang Geng Wu Xun Hong 《中国科学技术大学学报》 CAS CSCD 北大核心 2025年第3期12-18,11,I0001,共7页
The hydrazine oxidation reaction(HzOR)has garnered significant attention as a feasible approach to replace sluggish anodic reactions to save energy.Nevertheless,there are still difficulties in developing highly effici... The hydrazine oxidation reaction(HzOR)has garnered significant attention as a feasible approach to replace sluggish anodic reactions to save energy.Nevertheless,there are still difficulties in developing highly efficient catalysts for the HzOR.Herein,we report amorphous ruthenium nanosheets(a-Ru NSs)with a thickness of approximately 9.6 nm.As a superior bifunctional electrocatalyst,a-Ru NSs exhibited enhanced electrocatalytic performance toward both the HzOR and hydrogen evolution reaction(HER),outperforming benchmark Pt/C catalysts,where the a-Ru NSs achieved a work-ing potential of merely-76 mV and a low overpotential of only 17 mV to attain a current density of 10 mA·cm-2 for the HzOR and HER,respectively.Furthermore,a-Ru NSs displayed a low cell voltage of 28 mV at 10 mA·cm-2 for overall hy-drazine splitting in a two-electrode electrolyzer.In situ Raman spectra revealed that the a-Ru NSs can efficiently promote N‒N bond cleavage,thereby producing more*NH2and accelerating the progress of the reaction. 展开更多
关键词 amorphous structure Ru nanosheets hydrogen evolution reaction hydrazine oxidation reaction *NH2adsorp-tion
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Correlation between Structures of Bulk Amorphous Zr-Ti-Ni-Cu-Be Alloy in Different States 认领 引用
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作者 Xuelei TIAN and Xichen CHEN Institute of Mater. Sci. & Eng., Shandong University of Technology, Jinan 250061, China 《Journal of Materials Science & Technology》 SCIE EI CAS 2001年第1期93-94,共2页
The structures of the bulk amorphous Zr41Ti14Cu12.5Nil0.0Be22.5 alloy have been analyzed in solid, supercooled liquid and liquid with X-ray diffraction. The first coordination sphere radii and the first coordination n... The structures of the bulk amorphous Zr41Ti14Cu12.5Nil0.0Be22.5 alloy have been analyzed in solid, supercooled liquid and liquid with X-ray diffraction. The first coordination sphere radii and the first coordination numbers are 0.312 um, 11.2 in solid state.10.932 nm, 10.932 in supercooled liquid region and 0.305 urn, 11.296 in liquid state. The structures are the same in different states. But it shows some tendency to crystallizing that the first coordination sphere radius and the first coordination number drop in supercooled liquid region. 展开更多
关键词 Ti Zr Correlation between Structures of Bulk Amorphous Zr-Ti-Ni-Cu-Be Alloy in Different States Cu
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Micromagnetic Structure of Co-Rich Amorphous Microwires 认领 引用
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作者 E.E.Shalyguina and L.M.Bekoeva Kyung-Ho Shin 《Journal of Materials Science & Technology》 SCIE EI CAS 2000年第2期183-185,共3页
Results on the magneto-optical investigation of near-surface micromagnetic structure (MMS) of Co69Fe4Si12B15 amorphous wires 10～50 μm in diameter are presented. The wires were prepared by the rapid solidification te... Results on the magneto-optical investigation of near-surface micromagnetic structure (MMS) of Co69Fe4Si12B15 amorphous wires 10～50 μm in diameter are presented. The wires were prepared by the rapid solidification technique. The magnetic field H was applied along or perpendicular to the wire length. By scanning the light spot of 1 μm-diameter along the wire length, distributions of magnetization components (both parallel and perpendicular to the applied magnetic field) and also local hysteresis characteristics of the wires were measured. It was experimentally established that owing to the compressive stresses from quenching coupled with negative magnetostriction of Co-rich amorphous materials, the examined microwires have a circumferential magnetic anisotropy. In consequence, there are the near-surface alternate left- and right-handled circular domains in these samples. The dependencies of the circular domain width on the wire diameter and length were found. It was discovered that in the axial magnetic field local hysteresis loops are unhysteretic. It was proved that in this case the dominant mechanism of the wire magnetization reversal is rotation of local magnetization vectors in circular domains. 展开更多
关键词 Rich Micromagnetic Structure of Co-Rich Amorphous Microwires MMS
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Formation of non-equilibrium metastable phases in rapidly solidified Ti–Fe eutectic alloy 认领 引用
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作者 Xiaogang Gao Yibo Zhang +7 位作者 Zhichao Lu Jinkui Zhao Zhaohui Dong Ke Yang Dongbai Sun Xue Li Fanqiang Meng Dong Ma 《International Journal of Minerals,Metallurgy and Materials》 SCIE EI CAS CSCD 2026年第4期1269-1278,共10页
Ti–Fe alloys are indispensable for crucial applications in the aerospace,marine,and energy industries.To understand the effect of rapid solidification on phase formation and microstructural evolution in Ti–Fe alloys... Ti–Fe alloys are indispensable for crucial applications in the aerospace,marine,and energy industries.To understand the effect of rapid solidification on phase formation and microstructural evolution in Ti–Fe alloys,melt spinning of a typical Ti70.5Fe29.5eutectic alloy at different cooling rates was investigated in this study.The experimental results show that the melt-spun ribbons exhibit unique threelayered microstructure consisting of thin amorphous–nanocrystalline(Am–NC)hybrid layer on the chilled side and NC layer on the free side,which sandwich a fully Am middle layer.This microstructure is distinctly different from conventional eutectic-coupled microstructures observed in slow-cooled eutectic alloys.In particular,increasing the wheel speed resulted in a thicker Am layer and Fe enrichment,indicating the effect of solute segregation on the glass-forming ability,which is rarely seen in the formation of bulk metallic glasses.In addition,an unexpected Ti4Fe2O phase is observed in the NC layer in addition toβ-Ti and B2-TiFe phases formed via a divorced eutectic growth mechanism.The analysis indicated that rapid solidification and moderate oxygen doping/contamination are essential for promoting the formation of amorphous and metastable Ti4Fe2O phases.This study contributes to a better understanding of the phase-selection mechanism and microstructural evolution in Ti–Fe alloys under far-from-equilibrium conditions,providing useful implications for the fabrication of Ti–Fe-based alloys using rapid-solidification techniques. 展开更多
关键词 rapid solidification eutectic alloy melt spinning glass formation amorphous structure metastable phase
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Fabrication of composite microspheres doped with nano-aluminum powder using melt spray technology 认领 引用
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作者 Yilin Liu Lanqi Zhang +7 位作者 Yulong Yin Nan Li Xiangnan Chu Qi Ma Jing Liu Wenbo Yang Yingdi Lv Shengyang Tao 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2026年第2期283-292,共10页
Melt spray technology serves as an effective method for fabricating spherical micro-nano composite materials,with established applications in catalysts and pharmaceuticals.This study extends its application to energet... Melt spray technology serves as an effective method for fabricating spherical micro-nano composite materials,with established applications in catalysts and pharmaceuticals.This study extends its application to energetic composite microspheres,investigating the microsphere formation process using nano-aluminum powder(nano-Al)combined with the inert surrogate sucrose octaacetate(SOA).This study systematically investigates the effects of process parameters,formulation composition,and storage conditions on the particle size,morphology,and stability of SOA/Al composite microspheres.Higher atomizing gas pressure and temperature significantly reduced median particle diameter(D50),yielding a D50 of 35.09μm at 150℃ and 200 kPa.The addition of polyethylene glycol:polyvinylpyrrolidone(1:1)enhanced microsphere circularity from 0.67 to 0.85.This system produced 78 g composite microspheres within 20 min,demonstrating efficientlab-scale production.X-ray diffraction and differential scanning calorimetry results indicated that rapid cooling led to amorphous structures,which were stabilized during storage at 4℃.The scalable melt spray fabrication strategy developed here for nanoparticle-doped composite microspheres provides a basis for future studies involving diverse functional composites. 展开更多
关键词 Melt spray Micro-nano composite material Amorphous structure Composite microspheres
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Electrochemical deposited amorphous FeNi hydroxide electrode for oxygen evolution reaction 认领 引用 被引量：11
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作者 Zhengzhi Yin Runze He +4 位作者 Yongcai Zhang Ligang Feng Xiang Wu Thomas Wågberg Guangzhi Hu 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2022年第6期585-592,I0016,共8页
The electrodeposition approach is significant in electrode fabrication for practical application.Herein,the electrodeposited amorphous NiFe hydroxide species for oxygen evolution reaction (OER) in water splitting reac... The electrodeposition approach is significant in electrode fabrication for practical application.Herein,the electrodeposited amorphous NiFe hydroxide species for oxygen evolution reaction (OER) in water splitting reaction is demonstrated by revealing the synergistic effect influenced by the support electrode of Fe and Ni foil and the contents of Fe and Ni in the electrolyte.All the electrodeposited samples have an amorphous structure and similar profiles of binding energy and chemical states for Fe and Ni as characterized by the spectroscopic techniques.While the support effect and Fe/Ni synergistic effect are indeed observed for the varied catalytic performances observed for the different electrodes;the Ni foil supported catalyst exhibits much higher performance than that of the Fe foil supported catalyst,and the different redox potentials of Ni species in the different Fe/Ni electrode resulting from the Fe–Ni synergism are observed in the cyclic voltammetry curve analysis.The surface roughness and the electrochemical surface area are also influenced by the support effect and the Fe/Ni ratio in the plating electrolyte.The optimal electrode shows a very low overpotential of~200 mV to reach 10 mA cm-2,and very high catalytic stability by the consecutive cyclic voltammetry measurements and 20 h stability test.Though it has the largest electrochemical surface area,the highest catalytic efficiency for these active sites is also indicated by the specific activity and turnover frequency polarization curves.The current work shows the effective experience for the electrodeposited Fe/Ni based catalysts in large-scale fabrication,which can be more practical for hydrogen generation in the alkaline water electrolysis. 展开更多
关键词 Electrodeposition Amorphous structure NiFe hydroxide Oxygen evolution reaction Alkaline water electrolysis
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An amorphous manganese iron oxide hollow nanocube cathode for aqueous zinc ion batteries 认领 引用 被引量：2
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作者 Fengyang Jing Chade Lv +6 位作者 Liangliang Xu Yaru Shang Jian Pei Pin Song Yuanheng Wang Gang Chen Chunshuang Yan 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2023年第12期314-321,I0008,共8页
Aqueous zinc ion batteries(ZIBs) are attracting considerable attentions for practical energy storage because of their low cost and high safety.Nevertheless,the traditional manganese oxide cathode materials suffer from... Aqueous zinc ion batteries(ZIBs) are attracting considerable attentions for practical energy storage because of their low cost and high safety.Nevertheless,the traditional manganese oxide cathode materials suffer from the low intrinsic electronic conductivity,sluggish ions diffusion kinetics,and structural collapse,hindering their large-scale application.Herein,we successfully developed a latent amorphous Mn1.8Fe1.2O4 hollow nanocube(a-H-MnFeO) cathode material derived from Prussian blue analogue precursor.The amorphous nature endows the cathode with lower diffusion barrier and narrower band gap compared with crystalline counterpart,resulting in the superior Zn2+ ions and electrons transport kinetics.Hollow structure can furnish abundant surface sites and suppress the structural collapse during the repeated charge/discharge processes.By virtue of the multiple advantageous features,the a-H-MnFeO cathode exhibits exceptional electrochemical performance,in terms of high capacity,excellent rate capability,and prolonged cycle life.This strategy will pave the way for the structural design of emerging cathode materials. 展开更多
关键词 Aqueous zinc-ion batteries Manganese iron oxide cathode Amorphous structure Hollow nanostructure lons transport kinetics
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Amorphous Ni-Co-S nanocages assembled with nanosheet arrays as cathode for high-performance zinc ion battery 认领 引用 被引量：2
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作者 Na Li Guangmeng Qu +5 位作者 Xixi Zhang Shunshun Zhao Chenggang Wang Gang Zhao Peiyu Hou Xijin Xu 《Chinese Chemical Letters》 SCIE CAS CSCD 2022年第6期3272-3276,共5页
The selection and development of cathode of alkaline zinc batteries(AZBs)is still hindered and often leads to poor rate capability and short cycle life.Here,amorphous hollow nickel-cobalt-based sulfides nanocages with... The selection and development of cathode of alkaline zinc batteries(AZBs)is still hindered and often leads to poor rate capability and short cycle life.Here,amorphous hollow nickel-cobalt-based sulfides nanocages with nanosheet arrays(AM-NCS)are designed and constructed with ZIF-67 as the selftemplate to exchange with Ni2+ and S2- by using a two-step ion exchange method.The synthesized AM-NCS possess the high specific capacity(160 m Ah/g at 2 A/g),and the assembled battery has excellent rate performance(146 m Ah/g reversible capacity at 5 A/g).The assembled device has excellent rate performance(155 m Ah/g at 2 A/g)and long cycling stability(7000 cycles,62.5%of initial capacity).The excellent electrochemical properties of the electrode materials are mainly attributed to the unique structure,in particular,polyhedron structure with hollow structure can improve the cyclic stability,and the amorphous structure can expose more reactive sites on the surfaces of nickel,cobalt and sulfur.This work provides a new strategy for the design and fabrication of high performance cathode materials for AZBs. 展开更多
关键词 Alkaline zinc batteries Metal sulfide Hierarchical structures Amorphous structure Hollow structure
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Nanostructured Ti29.7Ni50.3Hf20 high temperature shape memory alloy processed by high-pressure torsion 认领 引用 被引量：5
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作者 A.Shuitcev D.V.Gunderov +3 位作者 B.Sun L.Li R.Z.Valiev Y.X.Tong 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2020年第17期218-225,共8页
High-pressure torsion(HPT)processing under a pressure of 6.0 GPa was applied to Ti29.7Ni50.3Hf20(at.%)alloy.Two types of structure were observed after HPT with 3 revolutions:first one is the mixture of amorphous phase... High-pressure torsion(HPT)processing under a pressure of 6.0 GPa was applied to Ti29.7Ni50.3Hf20(at.%)alloy.Two types of structure were observed after HPT with 3 revolutions:first one is the mixture of amorphous phase and retained nanocrystalline;second is the alternating bands of amorphous phase and high defect density crystalline.As a result,post deformation annealing(PDA)at 500-700℃leads to the non-uniform distribution of martensite and parent phase grains.The grains of martensite are twice larger compared to that of parent phase.The nanocrystalline and ultrafine grains form after annealing at 500-600℃and 700℃,respectively.The twinning mechanism does not change with the reduction of martensitic grains up to^35 nm.The relationship between strength and grain size in Ti29.7Ni50.3Hf20 alloy obeys the classical Hall-Petch relationship with a coefficient of 10.80±0.39 GPa nm^1/2. 展开更多
关键词 TiNiHf Nanocrystalline alloy Amorphous structure High-pressure torsion Hall-Petch relationship
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Microstructures of Ti–Ni–Fe wire after severe cold-drawing and annealing 认领 引用 被引量：2
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作者 Hui-Fang Geng Fu-Shun Liu 《Rare Metals》 SCIE EI CAS CSCD 2013年第6期550-554,共5页
The microstructures and mechanical properties of Ti–47 at%Ni–3 at%Fe shape memory alloy wire under the condition of severe cold-drawing at room temperature and different postdeformation annealing processes were inte... The microstructures and mechanical properties of Ti–47 at%Ni–3 at%Fe shape memory alloy wire under the condition of severe cold-drawing at room temperature and different postdeformation annealing processes were intensively investigated using transmission electron microscope(TEM),X-ray diffraction(XRD),Vickers microhardness tester and electron tensile tester.It is indicated that the structure of the alloy evolves into a predominant amorphous structure with a trace of nanocrystalline B2 phase after the cold-drawing of 76%areal reduction.Postdeformation annealing process exerted significant influence on the microstructure and mechanical properties.Crystallization occurs when the cold-drawn wire was annealed at 300℃ for 30 min.The ultimate tensile strength and ductility as well as the superelasticity of the wire are improved significantly by cold-drawing plus postdeformation annealing. 展开更多
关键词 Ti–Ni–Fe wire Severe plastic deformation Cold-drawing Annealing Amorphous structure
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