共活化法制备等级多孔炭材料及其储能性能研究

doi:10.11896/cldb.23080193

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Abstract In order to further improve the electrochemical energy storage performance of activated biomass carbon, hierarchical porous carbon material (HPC) was obtained by activating the waste wood pre-extracted with DES using different proportions of KOH and cyclotriphosphazene deri-vatives (HCPCP-K) as co-activators. Among the carbon materials obtained, the optimal carbon material HPC-1-4.35 possesses a high surface area and a total pore volume up to 1 987.43 m²/g and 1.313 6 cm³/g, respectively, and the corresponding proportion of microporous and mesoporous was close to 1∶1. Electrochemical tests showed that HPC-1-4.35 electrode displayed excellent specific capacitance of 555 F/g at a current density of 1 A/g and 398 F/g at a current density of 20 A/g, which revealed excellent rate capability. Meanwhile, in the two-electrode system, the assembled symmetric supercapacitors HPC-1-4.35∥HPC-1-4.35 exhibited a higher specific energy density of 30.6 Wh/kg with an excellent power density of 179.7 W/kg at room temperature and a perfect energy density of 9.8 Wh/kg at a power density of 63.07 W/kg at -20 ℃. Furthermore, it showed good cycling stability because the capacitance retention rate was 85% after 5 000 cycles of charging and discharging at a current density of 2 A/g.

Key words： co-activator nitrogen and phosphorus doping hierarchical porous carbon materials supercapacitor

Published: 10 February 2025 Online: 2025-02-05

CLC number:

TQ424.1

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	Articles by authors
	ZOU Zhenyu
	LIU Wei
	LI Pengjuan
	LI Xiaoli

Cite this article:

ZOU Zhenyu,LIU Wei,LI Pengjuan, et al. Preparation of Hierarchical Porous Carbon Materials by the Coactivation Method and Their Energy Storage Properties[J]. Materials Reports, 2025, 39(3): 23080193-7.

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http://www.mater-rep.com/EN/10.11896/cldb.23080193 OR http://www.mater-rep.com/EN/Y2025/V39/I3/23080193

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