Graphene Hydrogels Deposited in Nickel Foams for High-Rate Electrochemical Capacitors
- Resource Type
- Authors
- Peihui Luo; Ji Chen; Chun Li; Kaixuan Sheng; Gaoquan Shi
- Source
- Advanced Materials. 24:4569-4573
- Subject
- Supercapacitor
Materials science
Graphene
Mechanical Engineering
Graphene foam
Oxide
chemistry.chemical_element
Hydrogels
Electrolyte
Electric Capacitance
law.invention
chemistry.chemical_compound
Nickel
chemistry
Mechanics of Materials
law
Self-healing hydrogels
Electrode
Electrochemistry
Graphite
General Materials Science
Composite material
- Language
- ISSN
- 0935-9648
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).