Rational design of highly conductive and stable 3D flexible composite current collector for high performance lithium-ion battery electrodes  

作　　者：Huanyan Liu Jiajun Long Hua Yu Shichao Zhang Wenbo Liu 

机构地区：[1]School of Mechanical Engineering,Sichuan University,Chengdu 610065,China [2]School of New Energy and Materials,Southwest Petroleum University,Chengdu 610500,China [3]School of Materials Science and Engineering,Beihang University,Beijing 100191,China

出　　处：《Chinese Chemical Letters》2025年第3期483-487,共5页中国化学快报(英文版)

基　　金：financially supported by the National Natural Science Foundation of China(Nos.52075351,51604177);the National Key Research and Development Program of China(No.2019YFA0705701);the National Funded Postdoctoral Researcher Program(No.GZC20231762);the Major S&T Infrastructure Construction Project of Sichuan Province(No.2020-510000-73-01441847);the International S&T Innovation Cooperation Program of Sichuan Province(No.2020YFH0039);the Chengdu International S&T Cooperation Funded Project(Nos.2020-GH02-00006HZ,2022-GH02-00027-HZ);the“1000 Talents Plan”of Sichuan Province,and the Talent Introduction Program of Sichuan University(No.YJ201410)。

摘　　要：Anode active materials involving transition metal oxides and sulfides are of great significance for high energy density lithium-ion batteries(LIBs),but the huge volume expansion and inferior electronic conductivity upon cycling critically constrain their further application.Herein,from a new perspective,a highly conductive and stable 3D flexible composite current collector is rationally designed by facilely electrodepositing metallic Ni thin layer onto the carbon cloth(CC/Ni),which endows the supported active materials with exceptional electronic conductivity and structural stability.In addition,the homogeneously distributed metallic Ni protrusions external CC can strongly bond with the active components,ensuring the structural integrity of electrodes upon cycling.More importantly,the 3D network structure with large specific surface area provides abundant space to alleviate the volume expansion and more active sites for electrochemical reactions.Therefore,taking Ni_(3)S_(2)nanosheet(Ni_(3)S_(2)NS)anode as an example,the prepared Ni_(3)S_(2)NS@CC/Ni electrode shows a high specific capacity of 2.32 mAh/cm^(2)at 1mA/cm^(2)and high capacity retention of 1.68 mAh/cm^(2)at a high rate of 8mA/cm^(2).This study provides a universal approach to obtain highly conductive and stable 3D flexible current collectors towards high performance metal-ion batteries beyond LIBs.

关 键 词：Lithium-ion battery Composite current collector Highly conductive electrode High performance Metal sulfide 

分 类 号：TM912[电气工程—电力电子与电力传动]