期刊
APPLIED PHYSICS LETTERS
卷 96, 期 25, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.3455879
关键词
capacitance; electrochemistry; graphene; scanning electron microscopy; surface morphology; thin films; transmission electron microscopy
资金
- Natural Sciences and Engineering Research Council of Canada (NSERC)
- University of Waterloo
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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