Preparation and performance of MnO2/graphene composite electrode materials

被引：0

作者：

Yuan, Lei ^{[1
]}

Fu, Zhibing ^{[1
]}

Chang, Lijuan ^{[2
]}

Yang, Xi ^{[1
]}

Zhang, Houqiong ^{[1
]}

Wang, Chaoyang ^{[1
]}

Tang, Yongjian ^{[1
]}

机构：

[1] Research Center of Laser Fusion, CAEP, Mianyang

[2] Institute of Atomic and Molecular Physics, Sichuan University, Chengdu

来源：

Wang, Chaoyang | 1600年 / Editorial Office of High Power Laser and Particle Beams卷 / 26期

关键词：

Graphene; MnO[!sub]2[!/sub; Specific capacitance; Supercapacitor;

D O I：

10.11884/HPLPB201426.114102

中图分类号：

学科分类号：

摘要：

In this paper, graphene is synthesized from natural graphite by a modified Hummers method and glucose is added as reducing agent. Hydrothermal method is used to prepare MnO2/graphene composite using KMnO4 and HCl as raw materials. The structure is characterized by SEM and XRD. The result shows that MnO2 prepared by hydrothermal method is pure α-MnO2, and the addition of graphene powder doesn't influence its crystal structure. Electrochemical characterization is performed using cyclic voltammetry and chronopotentiometry in 1 mol/L Na2SO4 aqueous solution electrolyte. The electrode has a stable electrochemistry performance, and preferable reversibility, the specific capacitance of MnO2/graphene electrode is 147.9 F/g under 1.27 mA/cm2 current densities. The electrode presents a stable capacitiance after 1000 cycles and it is an ideal electrochemical material. ©, 2014, Editorial Office of High Power Laser and Particle Beams. All right reserved.

引用

页数：6

共 19 条

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