Facile construction of porous carbon fibers from coal pitch for Li-S batteries

Coal pitch, an important by-product in the coal coking industry with a high output, is a low-cost and high-carbon yield precursor for the manufacturing of high-value carbon materials. Herein, N/O co-doped carbon fiber (CF CP ), fabricated by electrospinning using pre-oxidized coal pitch as the precu...

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Bibliographic Details
Published in:International journal of coal science & technology 2024-12, Vol.11 (1), p.60-9, Article 60
Main Authors: Guo, Junzhuo, Lei, Zhiping, Yan, Honglei, Zhang, Weidong, Li, Zhan-Ku, Du, Zhiming, Yan, Jingchong, Shui, Hengfu, Ren, Shibiao, Wang, Zhicai, Kang, Shigang
Format: Article
Language:English
Subjects:
Adsorption
Batteries
Carbon
Carbon fiber
Carbon fibers
Catalytic conversion
Coal
Coal industry
Coal pitch
Coke industry
Electrochemistry
Electrolytes
Electrons
Energy
Fossil Fuels (incl. Carbon Capture)
Geotechnical Engineering & Applied Earth Sciences
Li-S batteries
Lithium
Lithium polysulfides adsorption
Mineral Resources
Raw materials
Specific capacity
Sulfur
Sulfur compounds
Sulfur content
Work stations
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Summary:Coal pitch, an important by-product in the coal coking industry with a high output, is a low-cost and high-carbon yield precursor for the manufacturing of high-value carbon materials. Herein, N/O co-doped carbon fiber (CF CP ), fabricated by electrospinning using pre-oxidized coal pitch as the precursor, was employed as the sulfur host for Li-S batteries. The presence of more pyrrolic N and graphic N in CF CP than carbon fiber made from polyacrylonitrile benefits the adsorption of lithium polysulfide and the battery’s life. Sulphur-CF CP cathode (S@CF CP ) exhibited excellent specific capacity and cyclability, with a specific capacity of 701.1 mAh/g and a low capacity decay rate of 0.088% per cycle over 200 cycles at 2.0 C, respectively. The high ion diffusion rate, low charge transfer resistance, and effective conversion of lithium polysulfides enable the high electrochemical performance of S@CF CP .
ISSN:2095-8293
2198-7823
DOI:10.1007/s40789-024-00711-y