Asymmetric supercapacitor based on nanostructured graphene foam/polyvinyl alcohol/formaldehyde and activated carbon electrodes

被引：59

作者：

Bello, Abdulhakeem ^{[1
]}

Barzegar, Farshad ^{[1
]}

Momodu, Damilola ^{[1
]}

Dangbegnon, Julien ^{[1
]}

Taghizadeh, Fatemeh ^{[1
]}

Fabiane, Mopeli ^{[1
]}

Manyala, Ncholu ^{[1
]}

机构：

[1] Univ Pretoria, SARChI Chair Carbon Technol & Mat, Inst Appl Mat, Dept Phys, ZA-0028 Pretoria, South Africa

来源：

JOURNAL OF POWER SOURCES | 2015年 / 273卷

基金：

新加坡国家研究基金会;

关键词：

Graphene foam; Polyvinyl alcohol; Formaldehyde; KOH activation; Asymmetric supercapacitor; HIERARCHICAL POROUS CARBON; HIGH-PERFORMANCE; ENERGY DENSITY; V; CAPACITOR; HYDROGEN; NANOFIBERS; STATE; FOAM;

D O I：

10.1016/j.jpowsour.2014.09.094

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070305 [高分子化学与物理];

摘要：

We present the electrochemical results of highly porous and interconnected carbon material by activation of graphene foam/polyvinyl alcohol-formaldehyde composite material designated as GF/PVA-F. Asymmetric supercapacitor devices were fabricated using the activated material (GF/PVA-F) and activated carbon (AC) as the positive and negative electrodes respectively. The device exhibited a maximum energy density of 42 mWh cm(-2), a power density of 0.5 W cm(-2) and 98% retention of its initial capacitance after 2000 cycles in an extended cell potential window of 1.8 V in 1 M Na2SO4 aqueous electrolyte. This work shows the great potential of this material for high performance energy storage application. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：305 / 311

页数：7

共 44 条

[1]

An asymmetric anthraquinone-modified carbon/ruthenium oxide supercapacitor [J].