Ti_(3)C_(2)T_(x)-TiSe_(2) analogous heterostructure for flexible zinc ion battery

作     者：Li Wen Junjie Shi Qixiang Zhang Fei Wang Siliang Wang Shaojun Zhang Qiang Wang Ke Mao Fei Long Yihua Gao Li Wen;Junjie Shi;Qixiang Zhang;Fei Wang;Siliang Wang;Shaojun Zhang;Qiang Wang;Ke Mao;Fei Long;Yihua Gao

作者机构：Center for Nanoscale Characterization&Devices(CNCD)School of Physics and Wuhan National Laboratory for Optoelectronics(WNLO)Huazhong University of Science and Technology(HUST)Wuhan 430074China Information Materials and Intelligent Sensing Laboratory of Anhui ProvinceSchool of Integrated CircuitsAnhui UniversityHefei 230601China College of Materials Science and EngineeringGuangxi Key Laboratory of Optical and Electronic Materials and DevicesGuilin University of TechnologyGuilin 541004China 

出 版 物：《Journal of Materials Science & Technology》 (材料科学技术（英文版）)

年 卷 期：2023年第150卷第19期

页      面：225-232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] 0806[工学-冶金工程] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：supported by the National Natural Science Foundation of China (Nos.12004002 and 12274151) Anhui Provincial Natural Science Foundation (No.1908085QF251) Foundation for Introduction of High-Level Talents of Anhui University (No.S020118002/061). 

主　　题：Flexible zinc ion battery Analogous heterostructure Zinc dendrite Zinc free metal anode MXene flakes TiSe_(2)nanosheets 

摘      要：Exploring zinc-free anode materials is one of the effective strategies to get the zinc dendrites problem of flexible zinc ion battery(ZIB)solved.In this work,an analogous heterostructure(AHS)is constructed from the excellent MXene(Ti_(3)C_(2)T_(x))and TiSe_(2) nanosheets.The AHS not only possesses numerous diffu-sion paths and Zn^(2+)storage sites but also possesses a stable conductive network to accelerate charge transfer in the electrode.As a collaborative advantage,electrochemical measurement results show that MXene/TiSe_(2) electrodes display an excellent specific capacity of 177.9 mAh g^(-1) at 0.10 A g^(-1) and a long-term cycling stability of 77.4%capacity retention after 400 cycles.DFT computations further demon-strate the excellent performance of MXene/TiSe_(2) electrodes including desirable electronic conductivity and low Zn^(2+)migration barriers.The assembled flexible ZIB not only delivers a good specific capacity of 42.2μAh cm^(-2) at 0.20 mA cm^(-2) and a competitive energy density of 37.4μWh cm^(-2) but also exhibits excellent flexibility and thermostability.Furthermore,after 400 cycles at 0.60 A g^(-1),flexible ZIB shows a capacity retention of 73.8%.This work gives a successful attempt to design 2D layered materials as Zn metal-free anode for flexible ZIB.