Journal
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
Volume 160, Issue 1, Pages A98-A104Publisher
ELECTROCHEMICAL SOC INC
DOI: 10.1149/2.012302jes
Keywords
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Funding
- National Natural Science Foundation of China [21103025, 20925312]
- State Key Basic Research Program of PRC [2011CB935903]
- Shanghai Science & Technology Committee [11DZ100207]
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In this work, graphene-supported Ni(OH)(2)-nanowires were prepared through a facile hydrothermal method, and their charge storage behavior was studied in comparison with ordered mesoporous carbon CMK-5. The as-prepared Ni(OH)(2)-nanowires displays ultrafast charge-discharge rate, owing to their unique nanostructure. The comparison investigation demonstrates that the capacitance of graphene-supported Ni(OH)(2)-nanowires mainly arises from battery behavior, rather than pseudocapacitive behavior. Finally, the graphene-supported Ni(OH)(2)-nanowires and CMK-5 were used as the positive and negative electrode, respectively, to form a high performance hybrid supercapacitor which can deliver a maximum specific power density of 40840 W/kg with a high energy density of about 17.3 Wh/kg. Thereby, this hybrid supercapacitor should be a promising system for fast energy storage. (C) 2012 The Electrochemical Society. [DOI: 10.1149/2.012302jes] All rights reserved.
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