Porous CoO nanobundles composited with 3D graphene foams for supercapacitors electrodes

被引：32

作者：

Deng, Wei ^{[1
,2
]}

Sun, Yaru ^{[1
,2
]}

Su, Qing ^{[1
,2
]}

Xie, Erqing ^{[1
,2
]}

Lan, Wei ^{[1
,2
]}

机构：

[1] Lanzhou Univ, Minist Educ, Key Lab Magnetism & Magnet Mat, Lanzhou 730000, Peoples R China

[2] Lanzhou Univ, Sch Phys Sci & Technol, Lanzhou 730000, Peoples R China

来源：

MATERIALS LETTERS | 2014年 / 137卷

关键词：

Graphene foam; Porous materials; Supercapacitors; Chemical vapor deposition; Hydrothermal process; ELECTROCHEMICAL CAPACITORS;

D O I：

10.1016/j.matlet.2014.08.154

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

CoO nanobundles composited with 3D graphene foams (CoO NB@GF) in which CoO NB consisted of porous nanoflakes are uniformly and closely bonded with GF were prepared by the combination of chemical vapor deposition, hydrothermal method and thermal treatment. The CoO NB@GF composites showing lightweight and high conductivity can serve directly as supercapacitors electrodes (including current collectors) without any other conductive agents and binders. The cyclic voltammetry and galvanostatic charge/discharge measurements on CoO NB@GF electrodes demonstrated a high specific capacitance of 352.75 F/g (221.75 F/g scaled to total mass of electrodes) at 1 A/g current density, good rate performance and nearly no decay of the specific capacitance after 1000 charge/discharge cycles at 10 A/g current. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：124 / 127

页数：4