文献类型：期刊文献

英文题名：Co3O4@CoS Core-Shell Nanosheets on Carbon Cloth for High Performance Supercapacitor Electrodes

作者：Ning, Jinfeng[1];Zhang, Tianyu[1];He, Ying[1];Jia, Congpu[1];Saha, Petr[2];Cheng, Qilin[1,2]

机构：[1]East China Univ Sci & Technol, Sch Mat Sci & Engn, Key Lab Ultrafine Mat, Minist Educ, Shanghai 200237, Peoples R China;[2]Tomas Bata Univ, Ctr Polymer Syst, Nam TG Masaryka 5555, Zlin 76001, Czech Republic

年份：2017

卷号：10

期号：6

外文期刊名：MATERIALS

收录：;EI(收录号：20172403769357);WOS:【SCI-EXPANDED(收录号:WOS:000404415000042)】；

基金：This work was supported by the National Natural Science Foundation of China (21371057), the International Science and Technology Cooperation Program of China (2016YFE0131200, 2015DFA51220), and International Cooperation Project of Shanghai Municipal Science and Technology Committee (15520721100).

语种：英文

外文关键词：Co3O4; CoS; carbon cloth; supercapacitor; nanostructured arrays

摘要：In this work, a two-step electrodeposition strategy is developed for the synthesis of core-shell Co3O4@CoS nanosheet arrays on carbon cloth (CC) for supercapacitor applications. Porous Co3O4 nanosheet arrays are first directly grown on CC by electrodeposition, followed by the coating of a thin layer of CoS on the surface of Co3O4 nanosheets via the secondary electrodeposition. The morphology control of the ternary composites can be easily achieved by altering the number of cyclic voltammetry (CV) cycles of CoS deposition. Electrochemical performance of the composite electrodes was evaluated by cyclic voltammetry, galvanostatic charge-discharge and electrochemical impedance spectroscopy techniques. The results demonstrate that the Co3O4@CoS/CC with 4 CV cycles of CoS deposition possesses the largest specific capacitance 887.5 Fg(-1) at a scan rate of 10 mVs(-1) (764.2 Fg(-1) at a current density of 1.0 Ag-1), and excellent cycling stability (78.1% capacitance retention) at high current density of 5.0 Ag-1 after 5000 cycles. The porous nanostructures on CC not only provide large accessible surface area for fast ions diffusion, electron transport and efficient utilization of active CoS and Co3O4, but also reduce the internal resistance of electrodes, which leads to superior electrochemical performance of Co3O4@CoS/CC composite at 4 cycles of CoS deposition.