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Royal Society of Chemistry, Nanoscale, 16(7), p. 7035-7039

DOI: 10.1039/c4nr06527a

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Two-dimensional NiCo2O4nanosheet-coated three-dimensional graphene networks for high-rate, long-cycle-life supercapacitors

Journal article published in 2015 by Jiang Zhou, Ying Huang, Xiehong Cao, Bo Ouyang, Wenping Sun ORCID, Chaoliang Tan ORCID, Yu Zhang, Qinglang Ma, Shuquan Liang, Qingyu Yan, Hua Zhang ORCID
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This paper is available in a repository.

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Abstract

We report the synthesis of two-dimensional (2D) NiCo2O4 nanosheet-coated three-dimensional graphene network (3DGN), which is then used as an electrode for high-rate, long-cycle-life supercapacitors. Using the 3DGN and nanoporous nanosheets, an ultrahigh specific capacitance (2173 F g(-1) at 6 A g(-1)), excellent rate capability (954 F g(-1) at 200 A g(-1)) and superior long-term cycling performance (94% capacitance retention after 14 000 cycles at 100 A g(-1)) are achieved.