Journal
MICROPOROUS AND MESOPOROUS MATERIALS
Volume 291, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.micromeso.2019.109709
Keywords
Cobalt oxide; Rice husk; Biocarbon; Hierarchy porous; Asymmetric supercapacitors
Categories
Funding
- Natural Science Foundation of Fujian Province of China [2014H0028, 11204258]
- Outstanding Young Scientific Research Personnel Training Plan in Colleges and Universities of Fujian Province [JA13229]
- Open Fund of Fujian Provincial Key Laboratory of Functional Materials and Applications (Xiamen University of Technology)
- Educational Research Projects for Young and Middle-aged Teachers in Fujian [JT180422]
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The natural biological waste, grain husk, was pre-treated by high temperature-activated carbonization with KOH, and the derived multi-pore carbon materials were obtained. Porous carbon-supported cobalt oxide composite materials were generated by anchoring flower-like cobalt oxide nanocrystals on porous carbon-derived materials via subsequent hydrothermal reactions. The maximum specific capacitance of the composites is 671 F g(-1) (0.5 A g(-1)), and 94.01% of specific capacitance is retained after 5000 cycles. The energy density of the asymmetric electrodes assembled is 35.08 Wh.kg(-1) at a power density of 0.63 kW kg(-1), indicating their potential application value in energy storage devices.
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