NiCo_(2)O_(4)@quinone-rich N-C core-shell nanowires as composite electrode for electric double layer capacitor  

作　　者：Yanli Fang Hui Wang Xuyun Wang Jianwei Ren Rongfang Wang 

机构地区：[1]State Key Laboratory Base for Eco-Chemical Engineering,College of Chemical Engineering,Qingdao University of Science and Technology,Qingdao 266042,China [2]Department of Mechanical Engineering Science,University of Johannesburg,Johannesburg 2006,South Africa

出　　处：《Frontiers of Chemical Science and Engineering》2023年第4期373-386,共14页化学科学与工程前沿（英文版）

基　　金：the Natural Science Foundation of Shandong Province of China (Grant No.ZR2020MB024)for financially supporting this work.

摘　　要：The bind-free carbon cloth-supported electrodes hold the promises for high-performance electrochemical capacitors with high specific capacitance and good cyclic stability.Considering the close connection between their performance and the amount of carbon material loaded on the electrodes,in this work,NiCo_(2)O_(4) nanowires were firstly grown on the substrate of active carbon cloth to provide the necessary surface area in the longitudinal direction.Then,the quinone-rich nitrogen-doped carbon shell structure was formed around NiCo_(2)O_(4) nanowires,and the obtained composite was used as electrode for electric double layer capacitor.The results showed that the composite electrode displayed an area-specific capacitance of 1794 mF·cm^(-2) at the current density of 1 mA·cm^(-2).The assembled symmetric electric double layer capacitor achieved a high energy density of 6.55 mW·h·cm^(-3) at a power density of 180 mW·cm^(-3).The assembled symmetric capacitor exhibited a capacitance retention of 88.96%after 10000 charge/discharge cycles at the current density of 20 mA·cm^(-2).These results indicated the potentials in the preparation of the carbon electrode materials with high energy density and good cycling stability.

关 键 词：carbon cloth NiCo_(2)O_(4)nanowires core−shell structure quinone-rich electric double layer capacitor 

分 类 号：TM53[电气工程—电器] O646.54[理学—物理化学]