首页|Facile construction of porous carbon fibers from coal pitch for Li-S batteries
Facile construction of porous carbon fibers from coal pitch for Li-S batteries
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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(CFCP),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 CFCP than carbon fiber made from polyacrylonitrile benefits the adsorption of lithium polysulfide and the battery's life.Sulphur-CFCP cathode(S@CFCP)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@CFCP.
School of Chemistry & Chemical Engineering,Anhui Key Laboratory of Coal Clean Conversion and High Valued Utilization,Anhui University of Technology,Ma'anshan,Anhui 243002,China
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