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- W3211181872 abstract "It is a significant challenge to combine a large pseudocapacitive material with conductive honeycomb-like carbon frameworks for long-term stable supercapacitors. Herein, hierarchical composite materials are manufactured by using biomass carbon, ZIF-67, and a mild pore former (Ni(CH3COO)2) to generate alloy-type CoNi3 nanoparticles planted into conductive honeycomb-like carbon frameworks (C@ZIF-67-T). Meanwhile, the effect of carbonization temperature on the honeycomb-like pore size and the structure of composite materials is systematically investigated. As the honeycomb-like carbon skeleton structure guarantees good ionic and electronic conductivities and a large contact area, whereas the alloy nanoparticles provide a rich redox reaction for Faradaic capacitance. Therefore, the as-obtained C@ZIF-67-600 electrode presents a remarkable specific capacitance of 1044.8 F · g-1 at 1.0 A · g-1 and an ultra-long cycling stability with 30,000 cycles at 5.0 A · g-1 in a three-electrode system. In addition, the assembled C@ZIF-67-600//activated carbon asymmetrical supercapacitor exhibit a high specific capacitance of 274.4F · g-1 at 1.0 A · g-1 and a long-term stable lifespan with a capacitance retention of 87% after 20,000 cycles at 5.0 A · g-1. Besides, the asymmetrical supercapacitor also presents a maximum energy density of 85.13 Wh · kg-1 at a power density of 750 W · kg-1. Such superior electrochemical performance demonstrate that the designed electrode material provides a promising energy storage application." @default.
- W3211181872 created "2021-11-08" @default.
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- W3211181872 date "2022-02-01" @default.
- W3211181872 modified "2023-09-27" @default.
- W3211181872 title "Honeycomb-like biomass carbon with planted CoNi3 alloys to form hierarchical composites for high-performance supercapacitors" @default.
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- W3211181872 doi "https://doi.org/10.1016/j.jcis.2021.10.184" @default.
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