期刊
APPLIED SURFACE SCIENCE
卷 463, 期 -, 页码 721-731出版社
ELSEVIER
DOI: 10.1016/j.apsusc.2018.08.172
关键词
Supercapacitor; NiMoO4/NiO nanoflowers; Asymmetric supercapacitor; Positive electrode
类别
资金
- National Natural Science Foundation of China [51472094, 91422301]
- Research Innovation Project of Graduate Students in Huaqiao University [1601102004]
- New Century Excellent Talents in Fujian Province University [2014FJ-NCETZR02]
- Natural Science Foundation of Fujian Province [2017J01084]
- Scientific Research Foundation for the Returned Overseas Chinese Scholars
Currently, although some progress has already been achieved, the complex and high-cost synthetic route, and low electrochemical properties of supercapacitor still restrict its practical application. Here, NiMoO4/NiO nanoflowers material with a high specific surface area grown on a nickel foam conductive substrate is successfully synthesized via a facile and efficient method, which exhibits an excellent capacitance of 10.3 F cm(-2) (1982.3 F g(-1)), a good rate capability, and a remarkable cycling stability (capacity remain 98.6% after 3000 cycles). In addition, a novel asymmetric supercapacitor with excellent energy density is also fabricated via the NiMoO4/NiO nanoflowers as the positive electrode and a piece of active carbon as the negative electrode in 3M KOH electrolyte. The optimized asymmetric device operating at 1.7 V also offers a high energy density and an outstanding long-term cycling stability. These impressive results suggest that such NiMoO4/NiO nanoflowers can pave the way for designing and developing next-generation high-performance storage systems.
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