A Novel Strategy of Multi-element Nanocomposite Synthesis for High Performance ZnO-CoSe_(2) Supercapacitor Material Development  

作　　者：Xin Chen Yan Li Chang Li Hongliang Cao Chuanzhen Wang Siyu Cheng Qi Zhang 

机构地区：[1]Key Laboratory for Ultrafine Materials of Ministry of Education,and Shanghai Key Laboratory of Advanced Polymeric Materials,School of Materials Science and Engineering,East China University of Science and Technology,Shanghai 200237,China [2]Analytical and Testing Center,Anhui University of Science&Technology,Huainan,Anhui 232001,China [3]State Key Laboratory of Bioreactor Engineering,Biomedical Nanotechnology Centre,East China University of Science and Technology,Shanghai 200237,China

出　　处：《Chinese Journal of Chemistry》2021年第9期2441-2450,共10页中国化学（英文版）

基　　金：supported by the National Natural Science Foundation of China(No.21875066);the Shanghai Leading Academic Discipline Project(No.B502);the Shanghai Key Laboratory Project(No.08DZ2230500).

摘　　要：Developing multi-eleme nt composites is a promisi ng way for high perform a nee supercapacitor material developme nt,and simplifying the synthesis steps is critical for reducing the preparation costs and successful promotion of the materials.A novel one-step selective reaction strategy is developed,and successfully used to prepare four-element ZnO-CoSe_(2)(ZOCS)nano-spherical composites,to be used as supercapacitor materials.Started form nano-spherical glycerate templates,under the optimal synthesis condition,the obtained ZOCS-0.125 electrode material exhibits a specific capacitance of 450.7 F/g at 1 A/g and a good rate performance by keeping 76.8%capacitance at 20 A/g.Moreover,the ZOCS-0.125 electrode exhibits excellent cycle stability of 114.9%capacitance retention after 5000 cycles at 10 A/g.An asymmetric supercapacitor assembled by ZOCS-0.125 and activated carbon electrodes delivers an energy density of 22.35 Wh/kg at 825 W/kg,and a cycle stability of 105.6%capacitance retention after 5000 cycles.This work not only shows the good potential of the facilely prepared ZnO-CoSe_(2) composite electrode material,but also dem on strates a new strategy for low cost and high performance multielement composite material development,that can be used in a wide range of applications.

关 键 词：Selective combination SUPERCAPACITOR ELECTROCHEMISTRY Nan oparticles Energy conversion 

分 类 号：TM912[电气工程—电力电子与电力传动] TB332[一般工业技术—材料科学与工程]