Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 5, Issue 15, Pages 7122-7129Publisher
AMER CHEMICAL SOC
DOI: 10.1021/am401458x
Keywords
graphene; nickel foam; aerogel; supercapacitor; electrode
Funding
- Natural Science Foundation of China [21174032]
- National Basic Research Program of China [2011CB605704]
- PetroChina Innovation Foundation [2011D50060504]
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We reported a new type of graphene aerogel-nickel foam (GA@NF) hybrid material prepared through a facile two-step approach and explored its energy storage application as a binder-free supercapacitor electrode. By simple freeze-drying and the subsequent thermal annealing of graphene oxide hydrogel-NF hybrid precursor, three-dimensional graphene aerogels with high mass, hierarchical porosity, and high conductivity were deposited on a NF framework. The resulting binder-free GA@NF electrode exhibited satisfactory double-layer capacitive behavior with high rate capability, good electrochemical cyclic stability, and a high specific capacitance of 366 F g(-1) at a current density of 2 A g(-1). The versatility of this approach was further verified by the successful preparation of 3D graphene/carbon nanotube hybrid aerogel-NF as a supercapacitor electrode, also with improved electrochemical performance. With advantageous features, such a facile and versatile fabrication technique shows great promise in the preparation of various types of carbon-metal hybrid electrodes.
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