Graphene nanosheets as electrode material for electric double-layer capacitors

被引：314

作者：

Du, Xian ^{[1
]}

Guo, Peng ^{[1
]}

Song, Huaihe ^{[1
]}

Chen, Xiaohong ^{[1
]}

机构：

[1] Beijing Univ Chem Technol, State Key Lab Chem Resource Engn, Beijing 100029, Peoples R China

来源：

ELECTROCHIMICA ACTA | 2010年 / 55卷 / 16期

基金：

中国国家自然科学基金;

关键词：

Graphene nanosheets; Electric double-layer capacitor; Disordered stacking; Pore size distribution; Edges; ORDERED MESOPOROUS CARBONS; ELECTROCHEMICAL CAPACITANCE; ACTIVATED CARBONS; PORE-SIZE; SUPERCAPACITORS; GRAPHITE; CONDUCTIVITY; STORAGE; SHEETS; EDLC;

D O I：

10.1016/j.electacta.2010.03.047

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Graphene nanosheets (GNSs) with narrow mesopore distribution around 4 nm were mass-produced from natural graphite via the oxidation and rapid heating processes. The effects of oxidant addition on the morphology, structure and electrochemical performance of GNSs as electrode materials for electric double-layer capacitor (EDLC) were systematically investigated. The electrochemical properties of EDLC were influenced by the specific surface area, pore characteristics, layer stacking and oxygen-containing functional group contents of electrode materials. Deeper oxidation makes graphite possess both higher specific surface area and more graphene edges, which are favorable for the enhancement of capacitive performance of EDLC. The electrodes with freestanding graphene nanosheets prepared by coating method exhibited good rate capability and reversibility at high scan rates (to 250 mV s(-1)) in electrochemical performances. GNS electrode with specific surface area of 524 m2 g(-1) maintained a stable specific capacitance of 150 F g(-1) under specific current of 0.1 A g(-1) for 500 cycles of charge/discharge. (C) 2010 Elsevier Ltd. All rights reserved.

引用

页码：4812 / 4819

页数：8

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