title: Deposition of three-dimensional graphene aerogel on nickel foam as a binder-free supercapacitor electrode.
abstract: 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.
authors.affiliation: State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science and Laboratory of Advanced Materials, Fudan University, Shanghai 200433, China.
authors.forename: Shibing
authors.initials: S
authors.lastname: Ye
authors.forename: Jiachun
authors.initials: J
authors.lastname: Feng
authors.forename: Peiyi
authors.initials: P
authors.lastname: Wu