High-Power and Ultralong-Life Aqueous Zinc-Ion Hybrid Capacitors Based on Pseudocapacitive Charge Storage

Liubing Dong; Wang Yang; Wu Yang; Chengyin Wang; Yang Li; Chengjun Xu; Shuwei Wan; Fengrong He; Feiyu Kang; Guoxiu Wang

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High-Power and Ultralong-Life Aqueous Zinc-Ion Hybrid Capacitors Based on Pseudocapacitive Charge Storage

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Rechargeable aqueous zinc-ion hybrid capacitors and zincion batteries are promising safe energy storage systems.In this study,amorphous RuO2·H2O for the first time was employed to achieve fast and ultralong-life Zn2+storage based on a pseudocapacitive storage mechanism.In the RuO2·H2OZn zinc-ion hybrid capacitors with Zn(CF3SO3)2 aqueous electrolyte,the RuO2·H2O cathode can reversibly store Zn2+in a voltage window of 0.4-1.6 V(vs.Zn/Zn2+),delivering a high discharge capacity of 122 mAh g−1.In particular,the zinc-ion hybrid capacitors can be rapidly charged/discharged within 36 s with a very high power density of 16.74 kW kg−1 and a high energy density of 82 Wh kg−1.Besides,the zinc-ion hybrid capacitors demonstrate an ultralong cycle life(over 10,000 charge/discharge cycles).The kinetic analysis elucidates that the ultrafast Zn2+storage in the RuO2·H2O cathode originates from redox pseudocapacitive reactions.This work could greatly facilitate the development of high-power and safe electrochemical energy storage.

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《纳微快报：英文版》 |2019年第4期|P.650-658|共9页
作者
Liubing Dong; Wang Yang; Wu Yang; Chengyin Wang; Yang Li; Chengjun Xu; Shuwei Wan; Fengrong He; Feiyu Kang; Guoxiu Wang;
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作者单位

Centre for Clean Energy Technology Faculty of Science University of Technology Sydney Sydney NSW 2007 Australia;

Centre for Clean Energy Technology Faculty of Science University of Technology Sydney Sydney NSW 2007 Australia;

Centre for Clean Energy Technology Faculty of Science University of Technology Sydney Sydney NSW 2007 Australia;

School of Chemistry and Chemical Engineering Yangzhou University Yangzhou 225002 People’s Republic of China;

School of Photovoltaic and Renewable Energy Engineering University of New South Wales Sydney NSW 2052 Australia;

Shenzhen Geim Graphene Center Tsinghua Shenzhen International Graduate School Tsinghua University Shenzhen 518055 People’s Republic of China;

HEC Group Pty Ltd Canterbury VIC 3216 Australia;

HEC Group Pty Ltd Canterbury VIC 3216 Australia;

Shenzhen Geim Graphene Center Tsinghua Shenzhen International Graduate School Tsinghua University Shenzhen 518055 People’s Republic of China;

Centre for Clean Energy Technology Faculty of Science University of Technology Sydney Sydney NSW 2007 Australia;

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原文格式 PDF
正文语种 chi
中图分类电容器;
关键词
Zinc-ion hybrid capacitor; Hydrous ruthenium oxide; Ultralong life; Redox pseudocapacitance; High power;

机译：锌离子混合电容器;含水钌;超大寿命;氧化还原假胶片;高功率;

High-Power and Ultralong-Life Aqueous Zinc-Ion Hybrid Capacitors Based on Pseudocapacitive Charge Storage

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