Symmetric supercapacitors based on porous 3D interconnected carbon framework

被引：128

作者：

Bello, Abdulhakeem ^{[1
]}

Barzegar, Farshad ^{[1
]}

Momodu, Damilola ^{[1
]}

Dangbegnon, Julien ^{[1
]}

Taghizadeh, Fatemeh ^{[1
]}

Manyala, Ncholu ^{[1
]}

机构：

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

来源：

ELECTROCHIMICA ACTA | 2015年 / 151卷

基金：

新加坡国家研究基金会;

关键词：

Graphene foam; Polyvinyl alcohol; KOH activation; Symmetric supercapacitor; COMPOSITE ELECTRODES; ACTIVATION; KOH; NAOH;

D O I：

10.1016/j.electacta.2014.11.051

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

The construction and design of novel porous carbons for electric double-layer capacitors (EDLCs) application to meet the increasing demand and supply of energy is eminent. This is important because the pore volume (PV)/micropore volume (MV) in the porous network architecture of the carbon is mostly responsible for the ion traps in energy storage. Three dimensional carbon materials based on graphene materials with relatively high specific surface area (SSA) represents a promising material candidate for EDLCs applications. In this work, we synthesized highly porous carbon from graphene foam (GF) and polyvinyl alcohol PVA as a sacrificial template, and investigate their performance as electrodes for EDLCs applications. The as-produced carbons present a fairly large surface area (502 m(2) g(-1)), and a highly porous interconnected framework with mesopore walls and micropore texture which are suitable as electrode for energy storage. As electrode material in a symmetric configuration the activated graphene foam (AGF) showed a specific capacitance of 65 F g(-1), energy density of 12 Wh kg(-1), power density of 0.4 kW kg(-1), good rate performance and excellent long term stability in 1 M Na2SO4 aqueous with no capacitance loss after 3000 cycles. Crown Copyright (C) 2014 Published by Elsevier Ltd. All rights reserved.

引用

页码：386 / 392

页数：7

共 39 条

[31] Room temperature molten salt as electrolyte for carbon nanotube-based electric double layer capacitors [J].