Ultrathin, transparent, and flexible graphene films for supercapacitor application

被引：355
作者：
Yu, Aiping [1 ]
Roes, Isaac [1 ]
Davies, Aaron [1 ]
Chen, Zhongwei [1 ]
机构：
[1] Univ Waterloo, Dept Chem Engn, Waterloo, ON N2L 3G1, Canada
来源：
APPLIED PHYSICS LETTERS | 2010年 / 96卷 / 25期
基金：
加拿大自然科学与工程研究理事会;
关键词：
capacitance; electrochemistry; graphene; scanning electron microscopy; surface morphology; thin films; transmission electron microscopy;
D O I：
10.1063/1.3455879
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
This study reports the preparation of ultrathin, transparent graphene films for use in supercapacitor applications. The surface morphology of the films was investigated by scanning electron microscopy and transmission electron microscopy, revealing a very homogeneous surface with intimate contact between graphene sheets. Electrochemical characterization demonstrated nearly ideal electrical double layer capacitive behavior. The capacitance obtained from charge-discharge analysis is 135 F/g for a film of approximately 25 nm which has a transmittance of 70% at 550 nm and a high power density of 7200 W/kg in 2 M KCl electrolyte. (C) 2010 American Institute of Physics. [doi:10.1063/1.3455879]
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页数：3
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