High mass-loading and binder-free flexible vanadium-based oxide cathode for zinc-ion battery via a bridge of MXene  

作　　者：Kan Fang Fei Li Gui-Gen Wang Yi-Lin Liu Man-Lin Tan Da-Qiang Zhao Hua-Yu Zhang Jie-Cai Han 

机构地区：[1]Shenzhen Key Laboratory for Advanced Materials,School of Materials Science and Engineering,Harbin Institute of Technology,Shenzhen 518055,China [2]National Key Laboratory of Science and Technology on Advanced Composites in Special Environments,Harbin Institute of Technology,Harbin 150080,China [3]Research Institute of Tsinghua University in Shenzhen,Shenzhen 518055,China

出　　处：《Journal of Materials Science & Technology》2023年第12期84-92,共9页材料科学技术（英文版）

基　　金：financially supported by the National Natural Science Foundation of China (Grant No.52072094);the Science Foundation of the National Key Laboratory of Science and Technology on Advanced Composites in Special Environ-ments (Grant No.6142905192507);the Shenzhen Constantly-supported Project for Universities and Colleges in 2021 (Nos.GXWD20201230155427003-20200821232246001);the Science,Technology and Innovation Commission of Shenzhen Municipal-ity (Grant No.CJGJZD20210408092200002).

摘　　要：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.

关 键 词：Zinc-ion batteries Vanadium oxide MXene bridge High mass-loading Flexible electrode 

分 类 号：TM912[电气工程—电力电子与电力传动] TQ137.12[化学工程—无机化工]