Facile construction of porous carbon fibers from coal pitch for Li-S batteries
Junzhuo Guo
Zhiping Lei
Honglei Yan
Weidong Zhang
Zhan-Ku Li
Zhiming Du
Jingchong Yan
Hengfu Shui
Shibiao Ren
Zhicai Wang
Shigang Kang
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
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 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.
机标关键词：carbonpitchfrombatteriescoalconstructionfacilefibers
论文发表日期：2024-08-28
在线出版日期：2025-08-15（本平台首次上网日期，不代表文献的发表时间）
页数：9( 290-298 )
英文信息