期刊
ENERGY & FUELS
卷 36, 期 21, 页码 13256-13265出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.energyfuels.2c02441
关键词
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资金
- China Postdoctoral Science Foundation [2021M693793, 2019T120251, 2018M630334]
- Natural Science Foundation of Heilongjiang Province [YQ2019E009]
- Heilongjiang Postdoctoral Young Talent Program [LBH-TZ05]
- Heilong-jiang Postdoctoral Scientific Research Developmental Fund [LBH-Q17034]
- University Nursing Program for Young Scholars with Creative Talents in Heilongjiang Province [UNPYSCT-2020143]
- Heilongjiang Postdoctoral General Fund [LBH-Z20123]
A method for preparing a composite of NiCo2O4 hexagonal nanoplates and three-dimensional porous carbon using cornstalk as the precursor has been proposed, which can effectively enhance the electrochemical properties of supercapacitors.
Because of the ever-growing concern on fossil energy depletion and ecological environment devastation, the exploitation of biomass-based energy storage devices has been an imperative trend. Here, the one-step carbonization process plus hydrothermal method is proposed to prepare the composite of NiCo2O4 hexagonal nanoplates and three-dimensional porous carbon using cornstalk as the precursor, which can effectively enhance the electrochemical properties of supercapacitors. Compared with the bare cornstalk-derived porous carbon (CSPC) or single NiCo2O4 nanoplates, the as-prepared composite exhibits high specific capacitance and long cycle life, which can be ascribed to the integration of the merits of CSPC with a highly conductive pore-rich structure and NiCo2O4 with high energy density, good redox property, and short ion transport channel. The specific capacitance can reach 959.2 F center dot g-1 in 6 M KOH electrolyte at a current density of 0.5 A center dot g-1, and the capacitance retention is 93% at a current density of 20 A center dot g-1 over more than 5000 cycles, indicating that this composite can be considered as an outstanding electrode material for the development of high-performance supercapacitors.
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