Reversible aqueous zinc-ion battery based on ferric vanadate cathode

作     者：Wang Yang Wu Yang Yongfeng Huang Chengjun Xu Liubing Dong Xinwen Peng Wang Yang;Wu Yang;Yongfeng Huang;Chengjun Xu;Liubing Dong;Xinwen Peng

作者机构：State Key Laboratory of Pulp and Paper EngineeringSouth China University of TechnologyGuangzhou 510640China Tsinghua Shenzhen International Graduate SchoolTsinghua UniversityShenzhen 518055China College of Chemistry and Materials ScienceJinan UniversityGuangzhou 511443China 

出 版 物：《Chinese Chemical Letters》 (中国化学快报（英文版）)

年 卷 期：2022年第33卷第10期

页      面：4628-4634页

核心收录：

学科分类：081702[工学-化学工艺] 0808[工学-电气工程] 08[工学] 0817[工学-化学工程与技术] 0703[理学-化学] 

基　　金：financially supported by the China Post-doctoral Science Foundation(Nos.2020M682710,2020M682711,2019M652882 and 2019T120725) Guangdong Basic and Applied Basic Research Foundation(No.2020A1515110705) National Program for Support of Top-notch Young Professionals(No.x2qsA4210090) National Natural Science Foundation of China,(No.31971614) State Key Laboratory of Pulp and Paper Engineering(No.2020C03). 

主　　题：Aqueous zinc-ion battery Ferric vanadate cathode Reversible phase transformation Zinc ion storage mechanism Biomass-based flexible quasi-solid-state battery 

摘      要：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 mechanism is still complex and challenging.Herein,open-structured ferric vanadate(Fe_(2)V_(4)O_(13))has been developed 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 Fe_(2)V_(4)O_(13),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 Fe_(2)V_(4)O_(13) cathode delivers a high discharge capacity of 380 mAh/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 2 mol/L Zn(CF_(3)SO_(3))_(2) aqueous solution.Moreover,the assembled Fe_(2)V_(4)O_(13)//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 Fe_(2)V_(4)O_(13),which may also be applicable to other vanadate cathodes,providing a new direction for the investigation and design of zinc-ion batteries.