文献类型：期刊文献

英文题名：One-step hydrothermal preparation of TiO2/RGO/Ni(OH)2/NF electrode with high performance for supercapacitors

作者：Zhao, Chongjun[1];Ju, Peiwen[1];Wang, Shengqi[1];Zhang, Yuxiao[1];Min, Shudi[1];Qian, Xiuzhen[1]

机构：[1]East 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：2016

卷号：218

起止页码：216

外文期刊名：ELECTROCHIMICA ACTA

收录：;EI(收录号：20164002869941);WOS:【SCI-EXPANDED(收录号:WOS:000385840100027)】；

基金：We gratefully acknowledge the support by the National Natural Science Foundation of China (No. 20504026), the Shanghai Natural Science Foundation (No. 13ZR1411900), Shanghai Key Laboratory Project (08DZ2230500) and Shanghai Leading Academic Discipline Project (B502).

语种：英文

外文关键词：TiO2/RGO/Ni(OH)(2); Ni foam; Hydrothermal; Supercapacitor

摘要：A facile one-step hydrothermal process is employed to synthesize a TiO2/RGO/Ni(OH)(2) (reduced graphene oxide, RGO) composite on nickel foam (NF) by means of an in-situ growth route. In this case, NF acts as support, nickel source of Ni(OH)(2), and supplement reductant of GO. For comparison, RGO nanosheets serve as nano-sized flexible support for connecting TiO2 and Ni(OH)(2) blocks, which improves the electron transfer and alleviates the volume changes during the repeated charge/discharge process thanks to its high conductivity and mechanical properties. Besides, P25 (commercial TiO2 consisting of 80% anatase and 20% rutile) serves as TiO2 source, at different GO/P25 ratio of 1%, 2%, 5%, 10% and 20%. Electrochemical performances of TiO2/RGO/Ni(OH)(2)/NF electrode were evaluated by using cyclic voltammetry (CV), galvanostatic charge/discharge tests (GCD) and electrochemical impedance spectroscopy (EIS) in 1 M KOH electrolyte. The TiO2/RGO/Ni(OH)(2)/NF electrode exhibited significantly enhanced capacitive performance when the weight ratio of GO/P25 was 10%. It delivered high capability of 4342 mF cm(-2) at a current density of 5 mA cm(-2) (374.3 F g(-1) at 0.43 A g(-1)), and excellent charge-discharge cycling stability with 93.75% capacitance retention after 2000 cycles. An asymmetric supercapacitor (ASC) device consisting of this TiO2/RGO/Ni(OH)(2)/NF and an AC negative electrode was assembled. (C) 2016 Elsevier Ltd. All rights reserved.