期刊
ACTA PHYSICO-CHIMICA SINICA
卷 28, 期 4, 页码 837-842出版社
PEKING UNIV PRESS
DOI: 10.3866/PKU.WHXB201202074
关键词
Supercapacitor; Ordered mesoporous carbon; NiCo2O4; Co-precipitation method
资金
- National Natural Science Foundation of China [20873064]
- Natural Science Foundation of Jiangsu Province, China [BK2011030]
- Specialized Research Fund for the Doctoral Program of Higher Education of China [20060287026]
OMC/NiCo2O4 composite was prepared by co-precipitation with ordered mesoporous carbon (OMC) as a support. The crystalline structure and morphology of the composite were investigated by X-ray diffraction (XRD), Fourier-transform infrared (FT-IR) spectroscopy, and transmission electron microscopy (TEM). TEM images showed that NiCo2O4 was uniformly coated on the OMC. Cyclic voltammetry and galvanostatic charge-discharge were used to investigate the electrochemical performance of the OMC/NiCo2O4 composite. The specific capacitances of the OMC/NiCo2O4 composite with a mass fraction of 40% NiCo2O4 were 577.0 F . g(-1) at a current density of 1 A . g(-1) and 470.8 F . g(-1) at 8 A . g(-1). The specific capacitance remains at 508.4 F . g(-1) after 2000 cycles at a current density of 2 A . g(-1), with a capacitance retention of 92.7%.
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