首页|Reversible aqueous zinc-ion battery based on ferric vanadate cathode

Reversible aqueous zinc-ion battery based on ferric vanadate cathode

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Rechargeable aqueous zinc-ion batteries have attracted extensive interest because of low cost and high safety.However,the relationship between structure change of cathode and the zinc ion storage mecha-nism is still complex and challenging.Herein,open-structured ferric vanadate(Fe2V4O13)has been devel-oped as cathode material for aqueous zinc-ion batteries.Intriguingly,two zinc ion storage mechanism can be observed simultaneously for the Fe2V4O13 electrode,i.e.,classical intercalation/deintercalation storage mechanism in the tunnel structure of Fe2V4O13,and reversible phase transformation from ferric vanadate to zinc vanadate,which is verified by combined studies using various in-situ and ex-situ techniques.As a result,the Fe2V4O13 cathode delivers a high discharge capacity of 380mAh/g at 0.2 A/g,and stable cyclic performance up to 1000 cycles at 10 A/g in the operating window of 0.2-1.6 V with 2mol/L Zn(CF3SO3)2 aqueous solution.Moreover,the assembled Fe2V4O13//Zn flexible quasi-solid-state battery also exhibits a relatively high mechanical strength and good cycling stability.The findings reveal a new perspective of zinc ion storage mechanism for Fe2V4O13,which may also be applicable to other vanadate cathodes,providing a new direction for the investigation and design of zinc-ion batteries.

Aqueous zinc-ion batteryFerric vanadate cathodeReversible phase transformationZinc ion storage mechanismBiomass-based flexible quasi-solid-state battery

Wang Yang、Wu Yang、Yongfeng Huang、Chengjun Xu、Liubing Dong、Xinwen Peng

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State Key Laboratory of Pulp and Paper Engineering,South China University of Technology,Guangzhou 510640,China

Tsinghua Shenzhen International Graduate School,Tsinghua University,Shenzhen 518055,China

College of Chemistry and Materials Science,Jinan University,Guangzhou 511443,China

中国博士后科学基金中国博士后科学基金中国博士后科学基金中国博士后科学基金Guangdong Basic and Ap-plied Basic Research Foundation国家优秀青年人才培养计划国家自然科学基金制浆造纸工程国家重点实验室项目

2020M6827102020M6827112019M6528822019T1207252020A1515110705x2qsA4210090319716142020C03

2022

中国化学快报(英文版)
中国化学会

中国化学快报(英文版)

CSTPCDCSCDSCI
影响因子：0.771
ISSN：1001-8417
年,卷(期)：2022.33(10)
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