Construction of Carbon-Coated Cobalt Sulfide Hybrid Networks Inter-Connected by Carbon Nanotubes for Performance-Enhanced Potassium-Ion Storage  

作　　者：Xuehao Zeng Huigang Tong Shi Chen Jian Lu Changlai Wang Jinwei Tu Pengcheng Wang Qianwang Chen 

机构地区：[1]Hefei National Laboratory for Physical Science at Microscale and Department of Materials Science&Engineering,University of Science and Technology of China,Hefei,Anhui 230026,China

出　　处：《Chinese Journal of Chemistry》2022年第11期1313-1320,共8页中国化学（英文版）

基　　金：This study was supported by the National Natural Science Foundation of China(51772283,22072140);the Fundamental Research Funds for the Central Universities(WK2060000032).

摘　　要：Because of its high theoretical capacity,transition metal sulfides have always been regarded as promising anode materials for potas-slum-ion batteries.However,It is difficult for us to make use of transition metal sulfides due to their low conductivity,poor ionic dif-fusivity,sluggish reaction kinetics and severe volume expansion.Here,we developed a novel carbon-coated CoSx@CNT material with carbon nanotubes inter-connected(CCS@CNT),which shows an excellent potassium storage performance with a specific capacity of 550 mA·h·g^(-1) under the current of 50 mA·g^(-1) and 296 mA·hg^(-1) at 1000 mA·g-1.The carbon layer can effectively alleviate volume ex-pansion during charging and discharging process.And this special structure of inter-connected hybrid networks with CNTs greatly improves the electron transport,ion diffusion coefficient and reaction kinetics of the material.

关 键 词：Carbon Cobalt Sulfur Potassium-ion batteries Inter-connected hybrid networks 

分 类 号：TM912[电气工程—电力电子与电力传动] TB383[一般工业技术—材料科学与工程]