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Bismuth Oxide Selenium/Graphene Oxide Composites:Toward High-Performance Electrodes for Aqueous Alkaline Battery
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作者 Yi-Lin Liu Meng-Qiu Li +6 位作者 gui-gen wang Le-Yang Dang Fei Li Mei Er Pam Hua-Yu Zhang Jie-Cai Han Hui Ying Yang 《Energy & Environmental Materials》 SCIE EI CAS CSCD 2021年第3期465-473,共9页
Aqueous alkaline battery represents a promising energy storage technology with both high energy density and high power density as rechargeable batteries.However,the low theoretical capacities,kinetics and stability of... Aqueous alkaline battery represents a promising energy storage technology with both high energy density and high power density as rechargeable batteries.However,the low theoretical capacities,kinetics and stability of anode materials have limited their developments and commercializations.In this study,we propose a novel method to produce two-dimensional layered bismuth oxide selenium(Bi_(2)O_(2)Se)and reduced graphene oxide(r GO)composites via a one-step hydrothermal method.The volume change caused by phase change during rapid charging and discharging is significantly reduced and the capacity reaches 263.83 m Ah g^(-1)at a current density of 0.5 A g^(-1).The Bi_(2)O_(2)Se/r GO electrode exhibits excellent cycling stability in which the capacity retention rate is 81.04%after 5000 cycles.More importantly,the Bi_(2)O_(2)Se/r GO nanosheet composite is used as the anode electrode material with MnCo_(2)O_(4.5)@Ni(OH)_(2)as the cathode electrode material in aqueous alkaline battery.When the energy density is 76.16 W h kg^(-1),the power density reaches 308.65 W kg^(-1).At a power density of 10.21 k W kg^(-1),the energy density remains as high as 33.86 W h kg^(-1).The results presented here may advance the understanding of the issues facing the development of aqueous battery anode materials. 展开更多
关键词 anode materials aqueous alkaline battery Bi_(2)O_(2)Se NANOSHEET reduced graphene oxide
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High mass-loading and binder-free flexible vanadium-based oxide cathode for zinc-ion battery via a bridge of MXene 被引量:1
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作者 Kan Fang Fei Li +5 位作者 gui-gen wang Yi-Lin Liu Man-Lin Tan Da-Qiang Zhao Hua-Yu Zhang Jie-Cai Han 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2023年第12期84-92,共9页
Flexible zinc-ion batteries(ZIBs)are promising power sources for portable devices due to their high safety and low production cost.However,the low mass-loading and limited areal capacity of cathode materials are the m... Flexible zinc-ion batteries(ZIBs)are promising power sources for portable devices due to their high safety and low production cost.However,the low mass-loading and limited areal capacity of cathode materials are the major problems blocking the practicability of ZIBs.Herein,a high mass-loading and binder-free flexible vanadium oxide(MCV@CC)cathode with a large areal capacity was fabricated via the bridge effect of MXene.The functional MXene bridge induces the growth of the vanadium oxide active layer on the carbon cloth(CC)flexible substrate.The binder-free cathode can reduce the electrochemically inactive weight of the whole electrode,which enhances the energy density of ZIBs.Consequently,the MCV@CC cathode(mass-loading of∼7 mg cm^(−2))delivers a desirable areal capacity(2.36 mAh cm^(−2))and good cycling stability(capacity retention of 86.1%after 1200 cycles at 10 mA cm^(−2)).Moreover,several ex-situ characterization results indicate that the reaction mechanism upon battery cycling is based on the reversible Zn^(2+)/H^(+)(de)intercalation in the vanadium oxide interlayer.Furthermore,the assembled quasi-solid-state MCV@CC//Zn flexible battery exhibits decent performance at different bending states.Such a bridge effect strategy sheds light on the construction of high mass-loading flexible electrodes for ZIBs applications. 展开更多
关键词 Zinc-ion batteries Vanadium oxide MXene bridge High mass-loading Flexible electrode
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In-sensor convolution processing with a bipolar p-n heterojunction
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作者 Mingqiang Liu gui-gen wang Zheng Liu 《Science Bulletin》 SCIE EI CAS CSCD 2022年第15期1519-1521,共3页
Image sensing is a critical component of modern machine vision technology development.The traditional silicon-based photodiodes possess inflexible responsivity and energy band structures that are hard to manipulate by... Image sensing is a critical component of modern machine vision technology development.The traditional silicon-based photodiodes possess inflexible responsivity and energy band structures that are hard to manipulate by an external field,limiting the system’s ability to process picture data[1].Additionally,existing memristor arrays can do some computation in hardware but cannot directly respond to optical signals,so it is necessary to use additional image sensors to convert optical signals into electrical signals before implementing further signal processing.As a result of their separate data processing units and image sensors,conventional image sensing systems face problems such as slow operation and excessive power consumption that can result in transmitting and processing huge amounts of duplicate information[2,3]. 展开更多
关键词 双极性 IMAGE HARDWARE
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