文献类型：期刊文献

英文题名：Supercapacitive performances of few-layer MoS2 on reduced graphene oxides

作者：Song, Xuehua[1,2];Chen, Qibin[1,2];Shen, Enhui[1,2];Liu, Honglai[1,2]

机构：[1]East China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Sch Chem & Mol Engn, Shanghai 200237, Peoples R China

年份：2019

卷号：23

期号：3

起止页码：911

外文期刊名：JOURNAL OF SOLID STATE ELECTROCHEMISTRY

收录：;EI(收录号：20190306386459);WOS:【SCI-EXPANDED(收录号:WOS:000459805700021)】；

基金：This work is supported by the National Natural Science Foundation of China (Nos. 21576079 and 91334203), the 111 Project of Ministry of Education of China (No. B08021), and the Fundamental Research Funds for the Central Universities of China (No. WK 1213003).

语种：英文

外文关键词：Reduced graphene oxide; MoS2; Composite; Supercapacitive electrode

摘要：Reduced graphene oxide/molybdenum disulfide composites (RGO/MoS(2)s) with steric structures were directly synthesized via a hydrothermal approach using a redox reaction between MoO3 and thiourea. Such RGO/MoS(2)s were examined by field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and Raman spectroscopy. The electrochemical performances of RGO/MoS2 hybrid electrodes were then assessed by cyclic voltammetry (CV), galvanostatic charge/discharge (GCD), and electrochemical impedance spectrometry (EIS) in 1M Na2SO4 aqueous solutions. RGO/MoS2 hybrid materials exhibit a high specific capacitance of 243.4F/g at 0.5A/g, a superior cycling stability (92% retention after 2000cycles at 1A/g) and a distinctively high coulombic efficiency (near 100% after 2000cycles) as well. Such excellent electrochemical behaviors could be ascribed to the steric structure of bending MoS2 nanosheets decorated on the surfaces of RGO, which favors facilitating the fast ion diffusion and the high conductivity in pseudocapacitive electrodes. Our findings suggested that the resulting morphologies and electrochemical performances of RGO/MoS2 hybrid materials could be tuned via varying steric structures of pseudocapacitive materials, which may render an alternative strategy to improve the electrochemical performance as supercapacitive electrodes.