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

作　　者：Junzhuo Guo Zhiping Lei Honglei Yan Weidong Zhang Zhan-Ku Li Zhiming Du Jingchong Yan Hengfu Shui Shibiao Ren Zhicai Wang Shigang Kang 

机构地区：[1]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

出　　处：《International Journal of Coal Science & Technology》2024年第4期290-298,共9页国际煤炭科学技术学报(英文)

基　　金：support from the Natural Scientific Foundation of China(22078002,22108004,and 22178002);supported also by the Anhui Provincial Department of Education key Project in Natural science for Universities(2023AH051114 and 2022AH050331).

摘　　要：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 fber(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 polysulfde 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.

关 键 词：Coal pitch Carbon fiber Li-S batteries Lithium polysulfides adsorption Catalytic conversion 

分 类 号：TM9[电气工程—电力电子与电力传动]