文献类型：期刊文献

英文题名：A facile one-step route to RGO/Ni3S2 for high-performance supercapacitors

作者：Zhang, Zhuomin[1];Zhao, Chongjun[1];Min, Shudi[1];Qian, Xiuzhen[1]

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

年份：2014

卷号：144

起止页码：100

外文期刊名：ELECTROCHIMICA ACTA

收录：;EI(收录号：20143900068772);WOS:【SCI-EXPANDED(收录号:WOS:000343951100014)】；

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

语种：英文

外文关键词：Reduced graphene oxide/nickel sulfide composites; Nickel foam; Hydrothermal process; Supercapacitors

摘要：A facile one-step solution-phase route to RGO/Ni3S2 on nickel foam (RGO/Ni3S2/NF) was presented. The RGO/Ni3S2/NF (RNS) nanocomposites were hydrothermal-assisted synthesized, in which nickel foam acted as an auxiliary reductant of GO and S, a Ni source of Ni3S2, and a substrate for composite film. RGO/Ni3S2/NF composites were characterized by X-ray diffraction (XRD), Raman spectroscopy, X-ray photoelectron spectroscopy (XPS), field-emission scanning electron microscope (FESEM), and transmission electron microscopy (TEM). The electrochemical performances of the supercapacitor with as-synthesized RGO/Ni3S2/NF (RNS) electrodes are evaluated using cyclic voltammetry (CV), galvanostatic charge-discharge (GCD), and electrochemical impedance spectrometry (EIS) in 2 M KOH aqueous solution. It is found that the RGO/Ni3S2/NF electrode exhibits superior supercapacitor performance (7440 mF cm(-2) at 10mA cm(-2), i.e., 2188.8 F g(-1) at 2.9 A g(-1)), compared with the Ni3S2/NF electrode (4360 mF cm(-2) at 10 mA cm(-2)) and the RGO/Ni(OH)(2)/NF electrode (3400 mF cm(-2) at 10 mA cm(-2)) prepared under identical conditions. Both the temperature and sulfur content play important roles in the controlled synthesis of RNS and its electrochemical performance. (C) 2014 Elsevier Ltd. All rights reserved.