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Graphene Hydrogels Deposited in Nickel Foams for High‐Rate Electrochemical Capacitors

2012; Volume: 24; Issue: 33 Linguagem: Inglês

10.1002/adma.201201978

1521-4095

Ji Chen, Kaixuan Sheng, Peihui Luo, Chun Li, Gaoquan Shi,

Conducting polymers and applications

Graphene hydrogel/nickel foam composite electrodes for high-rate electrochemical capacitors are produced by reduction of an aqueous dispersion of graphene oxide in a nickel foam (upper half of figure). The micropores of the hydrogel are exposed to the electrolyte so that ions can enter and form electrochemical double-layers. The nickel framework shortens the distances of charge transfer. Therefore, the electrochemical capacitor exhibits highrate performance (see plots). Detailed facts of importance to specialist readers are published as ”Supporting Information”. Such documents are peer-reviewed, but not copy-edited or typeset. They are made available as submitted by the authors. Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.