Communication

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

  1. Ji Chen,
  2. Kaixuan Sheng,
  3. Peihui Luo,
  4. Chun Li,
  5. Gaoquan Shi*

Article first published online: 12 JUL 2012

DOI: 10.1002/adma.201201978

Issue

Advanced Materials

Advanced Materials

Volume 24, Issue 33, pages 4569–4573, August 28, 2012

Additional Information

How to Cite

Chen, J., Sheng, K., Luo, P., Li, C. and Shi, G. (2012), Graphene Hydrogels Deposited in Nickel Foams for High-Rate Electrochemical Capacitors. Adv. Mater., 24: 4569–4573. doi: 10.1002/adma.201201978

Author Information

  1. Department of Chemistry, Tsinghua University, Beijing 100084, P. R. of China

*Department of Chemistry, Tsinghua University, Beijing 100084, P. R. of China.

Publication History

  1. Issue published online: 20 AUG 2012
  2. Article first published online: 12 JUL 2012
  3. Manuscript Revised: 15 JUN 2012
  4. Manuscript Received: 17 MAY 2012

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Keywords:

  • electrochemical capacitors;
  • electrodes;
  • graphene;
  • hydrogels;
  • nickel foam;
  • supercapacitors
Thumbnail image of graphical abstract

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).

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