一步法构筑石墨化多级孔碳材料及其超级电容储能性能研究

doi:10.11896/cldb.24080215

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Abstract Porous carbons have become the main contender of electrode materials for double-layer capacitors. Carbon materials used in supercapacitors usually require a large specific surface area, high electrical conductivity and efficient ion transport paths. However, such characteristics are usually incompatible in a single carbon material, which greatly restricts the capacitive performance of carbon-based capacitors. Herein, we deve-lop a simple and cost-efficient strategy to convert K₂FeO₄-impregnated biomass precursor into highly graphitized porous carbons (GPC) with hie-rarchical pores by a one-pot heat-treatment. K₂FeO₄ works as both a pore-forming agent and graphitization catalyst to fulfill the synchronous hie-rarchical pore generation and graphitization of the skeleton. The resultant GPC material has a large specific surface area (1 257.7 m²·g^-1) and a highly graphitized skeleton structure, which solves the competitive relationship in a single carbon material. Benefiting from these unique features, the GPC sample presents superior electrochemical capacitive performance in various aqueous electrolytes (KOH, H₂SO₄ and Na₂SO₄). The GPC electrode exhibits satisfactory specific capacitances of 354.8, 323.9 and 188.7 F·g^-1in H₂SO₄, KOH and Na₂SO₄ electrolytes, respectively. Meanwhile, the assembled GPC-based symmetric capacitors also achieve superb capacitive properties in KOH and Na₂SO₄ electrolytes, including high capacitance, superior rate capability, high energy density and prominent cycling stability. In addition, our proposed strategy not only alleviates the environmental pollution caused by discarded biowaste, but also obtains high-added-value carbon-based electrodes for supercapacitors in energy storage. Therefore, it demonstrates an example of trash-to-treasure transformation, boosting the utilization of abundant biowaste resources.

Key words： graphitization hierarchical pores supercapacitors

Published: 25 September 2025 Online: 2025-09-11

CLC number:

TF125.6

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	Articles by authors
	ZHOU Ke
	WANG Xiaoming
	JIN Qingren
	CHANG Binbin

Cite this article:

ZHOU Ke,WANG Xiaoming,JIN Qingren, et al. One-step Synthesis of Graphitized Hierarchical Porous Carbons for Energy Storage Performance Study in Supercapacitors[J]. Materials Reports, 2025, 39(18): 24080215-7.

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https://www.mater-rep.com/EN/10.11896/cldb.24080215 OR https://www.mater-rep.com/EN/Y2025/V39/I18/24080215

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