期刊
MATERIALS LETTERS
卷 285, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.matlet.2020.129101
关键词
Porous materials; Energy storage and conversion; Supercapacitor; Metal organic framework; Cobalt oxide
资金
- Natural Science Foundation of Guangdong Province [2018A0303130146]
- Basic and Applied Basic Research Foundation of Guangdong Province [2019A1515111198]
- Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development [E039kf0801]
In this study, a high-performance supercapacitor using a Co3O4 electrode with a porous nanostructure was successfully achieved through calcination treatment of the metal organic framework ZIF-67. The resulting Co3O4 electrode exhibited high specific capacitance, energy density, and excellent cycling stability.
Supercapacitors with cobalt oxide (Co3O4) electrode are a kind of strong candidates for achieving high capacity storage energy devices. However, the reported capacitances lower than the theoretical values are undesirable. In this study, a high-performance supercapacitor by using the Co3O4 electrode with a porous nanostructure is enabled by the calcination treatment of metal organic framework ZIF-67. Of note, the resulting Co3O4 electrodes shows high specific capacitance of 1015 F/g under a current density of 1 A/ g. Additionally, it exhibits energy density of 36.6 Wh/kg at a power density of 189.5 W/kg and maintains capacitance retention of 78.2% after 5000 cycles at 8 A/g. The strategy proposed here provides a good way to synthesize nanostructured Co3O4, a candidate for constructing high-capacitance energy storage devices. (c) 2020 Elsevier B.V. All rights reserved.
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