Pre-potassiated hydrated vanadium oxide as cathode for quasi-solid-state zinc-ion battery

查看全文 作　　者：Qifei [1]Li;Xiangxiang [1]Ye;Hong [2]Yu;Chengfeng [2]Du;Wenping [3,4]Sun;Weiling [5]Liu;Hongge [3,4]Pan;Xianhong [1]Rui

机构地区：[1]School of Materials and Energy,Guangdong University of Technology,Guangzhou 510006,China;[2]Center of Advanced Lubrication and Seal Materials,Northwestern Polytechnical University,Xi’an 710072,China;[3]Institute of Science and Technology for New Energy,Xi’an Technological University,Xi’an 710021,China;[4]School of Materials Science and Engineering,State Key Laboratory of Silicon Materials,Zhejiang University,Hangzhou 310027,China;[5]School of Materials Science and Engineering,Nanyang Technological University,Singapore 639798,Singapore

出　　处：《Chinese Chemical Letters》索引2022年第33卷第5期,共6页

基　　金：the National Natural Sci-ence Foundation of China(Nos.51972067,51802265,51802044,51902062 and 51802043);the Guangdong Natural Science Funds for Distinguished Young Scholar(No.2019B151502039). 摘　　要：Zinc-ion batteries(ZIBs),in particular quasi-solid-state ZIBs,occupy a crucial position in the field of energy storage devices owing to the superiorities of abundant zinc reserve,low cost,high safety and high theoretical capacity of zinc anode.However,as divalent Zn^(2+)ions experience strong electrostatic interactions when intercalating into the cathode materials,which poses challenges to the structural stability and higher demand in Zn^(2+)ions diffusion kinetics of the cathode materials.Here,a microwave-assisted hydrothermal method is adopted to prepare pre-potassiated hydrated vanadium pentoxide(K_(0.52)V_(2)O_(5)·0.29H_(2)O,abbreviated as KHVO)cathode material,in which the potassium ions preinserted into the interlayers can act as“pillars”to stabilize the lamellar structure,and crystal water can act as“lubricant”to improve the diffusion efficiency of Zn^(2+)ions.Consequently,the KHVO displays high electrochemical properties with high capacity(∼300 mAh/g),superior rate capability(69 mAh/g at 5 A/g)and ultralong cycling performance(>1500 cycles at 2 A/g)in quasi-solid-state ZIBs.These superior Zn storage properties result from the large diffusion coefficient and highly stable and reversible Zn^(2+)(de)intercalation reaction of KHVO. 关键词：Quasi-solid-state Zinc-ion batteries Hydrated vanadium oxide Pre-potassiated Electrochemical kinetics

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Pre-potassiated hydrated vanadium oxide as cathode for quasi-solid-state zinc-ion battery

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