文献类型：期刊文献

英文题名：Facile synthesis of Cu2O/CuO/RGO nanocomposite and its superior cyclability in supercapacitor

作者：Wang, Kun[1];Dong, Xiangmao[1];Zhao, Chongjun[1];Qian, Xiuzhen[1];Xu, Yunlong[1]

机构：[1]E China Univ Sci & Technol, Shanghai Key Lab Adv Polymer Mat, Sch Mat Sci & Engn, Key Lab Ultrafine Mat,Minist Educ, Shanghai 200237, Peoples R China

年份：2015

卷号：152

起止页码：433

外文期刊名：ELECTROCHIMICA ACTA

收录：;EI(收录号：20145000315885);WOS:【SCI-EXPANDED(收录号:WOS:000347711900056)】；

基金：We are grateful for the support of the National Natural Science Foundation of China (No. 20504026), the Shanghai Natural Science Foundation (No. 13ZR1411900), the Shanghai Leading Academic Discipline Project (No. B502), the Shanghai Key Laboratory Project (No. 08DZ2230500), and the EU FP7 Staff Exchange program (No. PIRSES-GA-2012-318990-ELEKTRONANOMAT).

语种：英文

外文关键词：Supercapacitor; Cu2O/CuO/RGO; Hydrothermal; Rate capability; Cycling stability

摘要：A reduced graphene oxide (RGO)-based nanocomposite of redox counterpart of the oxides of Cu(I)-Cu(II) pair for Faradaic reaction, Cu2O/CuO/RGO, was controllably synthesized through a facile, eco-friendly one-step hydrothermal-assisted redox reaction of elemental Cu and graphene oxide (GO) without the addition of any other reagents. The resultant Cu2O/CuO/RGO nanocomposites were characterized by X-ray diffraction (XRD), Raman spectroscopy, Thermogravimetric analysis (TG), X-ray photoelectron spectroscopy (XPS), field emission scanning electron microscopy (FESEM), and transmission electron microscopy (TEM). It is found that, when dealloyed nanoporous Cu was used as a Cu source, the uniform spherical Cu2O/CuO nanoparticles with double size scales (similar to 25 nm and similar to 5 nm) were anchored on RGO sheets. This Cu2O/CuO/RGO nanocomposite redox counterpart exhibits improved rate capability and excellent cycling stability, i.e., only ca. 21.4% of the capacity was lost when the discharge current density increases from 1 A g(-1) (173.4 F g(-1)) to 10 A g(-1) (136.3 F g(-1)). Especially, the capacity remains almost unchanged (98.2%) after 100,000 cycles at 10 A g(-1). The good electrochemical performance and simple accessibility prove that this Cu2O/CuO/RGO composite consisting of a pair of redox counterparts is a promising material for supercapacitor applications. (C) 2014 Elsevier Ltd. All rights reserved.