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Superior asymmetric supercapacitor based on Ni-Co oxide nanosheets and carbon nanorods.

ABSTRACT: Nickel and cobalt (Ni-Co) binary oxide nanosheets with mesoporous structure are prepared by a facile approach based on the formation and disassociation of nickel/cobalt-citrate complex, and they show an ultra-high Faradaic capacitance up to 1846?F g(-1) and excellent rate capability. On this basic, advanced aqueous asymmetric supercapacitors (AASs) are successfully built by using the Ni-Co oxide as the positive electrode and three kinds of activated carbons respectively as the negative electrode. As-made AASs are able to work reversibly in a full operated voltage region of 0-1.6?V and exhibit outstanding electrochemical performance. Among them, activated polyaniline-derived carbon (APDC)//Ni-Co oxide AASs shows the highest specific capacitance of 202?F g(-1), the maximum energy density of 71.7?Wh kg(-1), and superior combination of high energy and power density (a energy density of 41.6?Wh kg(-1) at a high power density of 16?kW kg(-1)).

SUBMITTER: Wang R

PROVIDER: S-EPMC3893647 | biostudies-literature | 2014 Jan

REPOSITORIES: biostudies-literature

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Superior asymmetric supercapacitor based on Ni-Co oxide nanosheets and carbon nanorods.

Wang Rutao R Yan Xingbin X

Scientific reports 20140116

Nickel and cobalt (Ni-Co) binary oxide nanosheets with mesoporous structure are prepared by a facile approach based on the formation and disassociation of nickel/cobalt-citrate complex, and they show an ultra-high Faradaic capacitance up to 1846 F g(-1) and excellent rate capability. On this basic, advanced aqueous asymmetric supercapacitors (AASs) are successfully built by using the Ni-Co oxide as the positive electrode and three kinds of activated carbons respectively as the negative electrode ...[more]

PMID: 24429842

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