Flexible CuCo_(2)O_(4)@Ni-Co-S hybrids as electrode materials for high-performance energy storage devices  

作　　者：Xiaowei Wang Yuchen Sun Wei-Chao Zhang Xiang Wu 

机构地区：[1]School of Materials Science and Engineering,Shenyang University of Technology,Shenyang 110870,China [2]Key Laboratory of Engineering Dielectrics and Its Application,Ministry of Education,Harbin University of Science and Technology,Harbin 150080,China

出　　处：《Chinese Chemical Letters》2023年第3期512-517,共6页中国化学快报（英文版）

基　　金：supported by National Natural Science Foundation of China(No.52172218);Key Laboratory of Engineering Dielectrics and Its Application(Harbin University of Science and Technology),Ministry of Education(No.KFZ202002)。

摘　　要：Rational design of electrode meterials with unique core-shell nanostructures is of great significance for improving the electrochemical performance of supercapacitors. In this work, we prepare several CuCo_(2)O_(4)@Ni-Co-S composite electrodes by a controllable hydrothermal and electrodeposition route. Onedimensional nanowires can shorten the ions transport path, while two-dimensional nanosheets expose many active sites. This enables three-dimensional structured composite with high electrochemical activity. The as-prepared heterostructured materials show a specific of 1048 C/g at 1 A/g. It still maintains 75.6% of initial capacity after 20000 cycles at 10 A/g. The device delivers an energy density of 79.2 Wh/kg when the power density reaches to 2280 W/kg. Moreover, it possesses an excellent mechanical stability after repeated folding at different angles.

关 键 词：Core-shell structure CuCo_(2)O_(4)@Ni-Co-S SUPERCAPACITOR Energy density Mechanical stability 

分 类 号：TB332[一般工业技术—材料科学与工程] TM53[电气工程—电器]