Graphene nanoplate-MnO2 composites for supercapacitors: a controllable oxidation approach

被引：121

作者：

Huang, Huajie ^{[1
]}

Wang, Xin ^{[1
]}

机构：

[1] Nanjing Univ Sci & Technol, Key Lab Soft Chem & Funct Mat, Minist Educ, Nanjing 210094, Peoples R China

来源：

NANOSCALE | 2011年 / 3卷 / 08期

基金：

高等学校博士学科点专项科研基金;

关键词：

ELECTROCHEMICAL CAPACITORS; MANGANESE OXIDE; ENERGY-STORAGE; CARBON NANOTUBES; PSEUDOCAPACITANCE PROPERTIES; HYDROTHERMAL SYNTHESIS; MNO2; ELECTRODES; GRAPHITE; DIOXIDE;

D O I：

10.1039/c1nr10229j

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Graphene nanoplate-MnO2 composites have been synthesized by oxidising part of the carbon atoms in the framework of graphene nanoplates at ambient temperature. The composites were characterized by means of X-ray diffraction (XRD), Raman spectroscopy, scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS) and cyclic voltammetry (CV). It was found that the oxidation extent of the carbon atoms in the graphene framework in these composites was dependent on the reaction time, which also influenced their microstructure, morphology and electrochemical properties. Compared with MnO2 nanolamellas, the nanocomposite prepared with a reaction time of 3 h reveals better electrochemical properties as a supercapacitor electrode material.

引用

页码：3185 / 3191

页数：7

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