期刊
DALTON TRANSACTIONS
卷 47, 期 24, 页码 8078-8086出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c8dt01735b
关键词
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资金
- National Natural Science Foundation of China [51203071, 51363014, 51463012, 51763014]
- China Postdoctoral Science Foundation [2014M552509, 2015T81064]
- Natural Science Funds of the Gansu Province [1506RJZA098]
- Program for Hongliu Distinguished Young Scholars in Lanzhou University of Technology [J201402]
- Shenyang National Laboratory for Materials Science [18LHPY002]
- State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals [18LHPY002]
Herein, ultra-small gold nanoparticles are decorated onto NiO nanobelts using HAuCl4 and Ni(OH)(2) nanobelts as precursors via a one-step thermal treatment, and a temperature of 500 degrees C is used for the decomposition of both precursors at the same time; the amount of gold nanoparticles in the electrode materials ranges from 0 to 17.38 wt%; moreover, the effect of the gold content on the structure and electrochemical performance has been investigated. The results show that the fabricated materials achieve a high specific capacitance of 597 F g(-1) with a Au content of 1.54 wt%, and the Au grain size is about 12.0 nm. An asymmetric supercapacitor device was assembled using gold nanoparticle/NiO as the positive electrode and activated carbon as the negative electrode, which exhibited a maximum energy density of 18.0 W h kg(-1) and an excellent cycle life, retaining 84% of the initial specific capacitance after 22000 cycles.
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