蜂窝状多孔碳材料装载硫单质及其在锂硫电池中的储能性能研究

doi:10.11896/cldb.23010004

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Abstract The further development of lithium sulfur battery is severely hindered by the insulation of elemental sulfur and its final product Li₂S as well as the structural collapse caused by their density difference, so finding a suitable carrier material is an efficient strategy to address the above-mentioned problems. In this work, a honeycomb-like porous carbon is selected as the host material for the sulfur cathode, the sulfur is immobilized in the pores of porous carbon by conventional melt diffusion method, and porous carbon@sulfur composite is characterized by SEM, XRD, XPS and BET techniques. The results show that the sulfur was uniformly loaded in the carbon skeleton. Meanwhile, the high electrical conductivity and honeycomb-like structure of porous carbon not only provide an electronic conductive network for the sulfur, but also ensures the stability of the cathode. More importantly, the honeycomb structure gives some buffer space for the volume expansion of the sulfur cathode during the cycling process, which lessens the trouble of structural collapse. In addition, the abundant pores in the host material decrease the shuttling of polysulfides to some extent. Therefore, the specific capacity of porous carbon@sulfur composite can deliver 1 125.9 mAh/g at 0.1C during the first discharging and maintain 305.1 mAh/g after 300 cycles.

Key words： lithium-sulfur battery cathode material honeycomb-like porous carbon electrochemical performance

Published: 25 August 2024 Online: 2024-09-10

CLC number:

O646.21

Fund:National Natural Science Foundation of China (51763014,52073133),Key Talent Project Foundation of Gansu Province.

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	Articles by authors
	KANG Xiaoya
	HE Tianqi
	ZHU Fuliang
	RAN Fen

Cite this article:

KANG Xiaoya,HE Tianqi,ZHU Fuliang, et al. Study of Sulfur Loaded in Honeycomb-Like Porous Carbon Materials and Energy Storage Performance in Lithium-Sulfur Battery[J]. Materials Reports, 2024, 38(16): 23010004-6.

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http://www.mater-rep.com/EN/10.11896/cldb.23010004 OR http://www.mater-rep.com/EN/Y2024/V38/I16/23010004

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