文献类型：期刊文献

英文题名：Construction of Hierarchical CuO/Cu2O@NiCo2S4 Nanowire Arrays on Copper Foam for High Performance Supercapacitor Electrodes

作者：Zhou, Luoxiao[1];He, Ying[1,2];Jia, Congpu[1];Pavlinek, Vladimir[2];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 Zlin, Ctr Polymer Syst, Nam TG Masaryka 5555, Zlin 76001, Czech Republic

年份：2017

卷号：7

期号：9

外文期刊名：NANOMATERIALS

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000411522600042)】；

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

语种：英文

外文关键词：copper oxide; nickel cobalt sulfide; hierarchical composite nanowires; supercapacitor; electrochemical properties

摘要：Hierarchical copper oxide @ ternary nickel cobalt sulfide (CuO/Cu2O@NiCo2S4) core-shell nanowire arrays on Cu foam have been successfully constructed by a facile two-step strategy. Vertically aligned CuO/Cu2O nanowire arrays are firstly grown on Cu foam by one-step thermal oxidation of Cu foam, followed by electrodeposition of NiCo2S4 nanosheets on the surface of CuO/Cu2O nanowires to form the CuO/Cu2O@NiCo2S4 core-shell nanostructures. Structural and morphological characterizations indicate that the average thickness of the NiCo2S4 nanosheets is similar to 20 nm and the diameter of CuO/Cu2O core is similar to 50 nm. Electrochemical properties of the hierarchical composites as integrated binder-free electrodes for supercapacitor were evaluated by various electrochemical methods. The hierarchical composite electrodes could achieve ultrahigh specific capacitance of 3.186 F cm 2 at 10 mA cm(-2), good rate capability (82.06% capacitance retention at the current density from 2 to 50 mA cm(-2)) and excellent cycling stability, with capacitance retention of 96.73% after 2000 cycles at 10 mA cm(-2). These results demonstrate the significance of optimized design and fabrication of electrode materials with more sufficient electrolyte-electrode interface, robust structural integrity and fast ion/electron transfer.