Open AccessManganese dioxide nanoflakes anchored on reduced graphene oxide with superior electrochemical performance for supercapacitors
Author(s) -
Zhang Lifeng,
Du Suqing,
Liu Yi,
Zheng Peng,
Yuan Xiaoyan,
Huang Jianfeng,
Guo Shouwu
Publication year - 2017
Publication title -
micro and nano letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.25
H-Index - 31
ISSN - 1750-0443
DOI - 10.1049/mnl.2016.0309
Subject(s) - supercapacitor , graphene , cyclic voltammetry , materials science , dielectric spectroscopy , electrochemistry , manganese , capacitance , oxide , composite number , chemical engineering , electrode , inorganic chemistry , nanotechnology , composite material , chemistry , metallurgy , engineering
Nanostructured manganese dioxide (MnO 2 )/reduced graphene oxide (RGO) composite is fabricated via a simple hydrothermal process. The MnO 2 /RGO composite is used to construct supercapacitors as electrodes with high loading mass of active materials. The electrochemical properties of constructed supercapacitors are tested by cyclic voltammetry, galvanostatic charge–discharge and electrochemical impedance spectroscopy. Electrochemical measurements demonstrate that MnO 2 /RGO electrode exhibits a high specific capacity of 316 F·g −1 at a current density of 200 mA·g −1 and good long‐term cycling stability with capacitance retention of 93% at 500 mA·g −1 after 1000 cycles. The superior electrochemical performance of as‐prepared composite could be mainly attributed to its unique structure, which is composed of MnO 2 nanoflakes well‐integrated on the surfaces of RGO.