期刊
ACS APPLIED MATERIALS & INTERFACES
卷 5, 期 21, 页码 11159-11162出版社
AMER CHEMICAL SOC
DOI: 10.1021/am403367u
关键词
energy storage; supercapacitor; carbon fiber; cobalt oxide; hybrid; composite
资金
- DOE ARPA-E project [DE-AR0000303]
- China Scholarship Council
We have successfully fabricated and tested the electrochemical performance of supercapacitor electrodes consisting of Ni(OH)(2) nanosheets coated on NiCo2O4 nanosheets grown on carbon fiber paper (CFP) current collectors. When the NiCo2O4 nanosheets are replaced by Co3O4 nanosheets, however, the energy and power density as well as the rate capability of the electrodes are significantly reduced, most likely due to the lower conductivity of Co3O4 than that of NiCo2O4. The 3D hybrid composite Ni(OH)(2)/ NiCo2O4/CFP electrodes demonstrate a high areal capacitance of 5.2 F/cm(2) at a cycling current density of 2 rnA/cm(2), with a capacitance retention of 79% as the cycling current density was increased from 2 to 50 mA/cm(2). The remarkable performance of these hybrid composite electrodes implies that supercapacitors based on them have potential for many practical applications.
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