New insights into the reaction mechanism of sulfurized polyacrylonitrile cathode material for Li-S batteries

Hu, Jing; Wang, Zhenyu; Lyu, Linlong; Qin, Ning; Li, Yingzhi; Gu, Shuai; Wang, Zhiqiang; Chen, Jingjing; Yuan, Huiming; Yang, Mingyang; Wang, Lei; Lu, Zhouguang; Liu, Chen

2024-08-01

10.1016/j.coco.2024.101971

COMPOSITES COMMUNICATIONS   影响因子和分区

2452-2139

Sulfurized polyacrylonitrile (SPAN) is a prospective cathode candidate for Li-S batteries due to capable of solving polysulfides dissolution and shuttle effect and presenting stable electrochemical performance. Despite the extensive research conducted on the synthetic conditions and pathways for SPAN modification, details of the molecular structure of SPAN and electrochemical reaction mechanism of SPAN electrode remain controversial. Herein, the formation of conjugate aromatic radical and new C-S bond during discharge process is proposed for the first time. During charge process, the S atom prioritize to combine with C radical on the aromatic ring, resulting in avoiding the generation of polysulfides over long cycles, which potentially account for the remarkable cycling stability observed in the SPAN cathode. This study offers novel insights into the underlying reaction mechanisms, thereby providing valuable guidance for further development of sulfurized cathode materials applied in advanced Li-S battery.

Lithium-sulfur batteries Sulfurized polyacrylonitrile Reaction mechanism

SCI

英语

其他

Basic and Applied Basic Research Project of Guangdong Province["2023A1515011055","2022A1515011438"] ; Basic Research Project of the Science and Technology Innovation Commission of Shenzhen["JCYJ2022081800003006","JCYJ20220818100418040","JCYJ20220531101013028"] ; National Natural Science Foundation of China[U22A20439] ; China Post-doctoral Science Foundation[2022M722168]

Materials Science

Materials Science, Composites

WOS:001261177700001

ELSEVIER SCI LTD

MATERIALS SCIENCE

Web of Science

1.Shenzhen Univ, Coll Mat Sci & Engn, Guangdong Res Ctr Interfacial Engn Funct Mat, Guangdong Prov Key Lab New Energy Mat Serv Safety, Shenzhen 518060, Peoples R China
2.Shenzhen Univ, Coll Phys & Optoelect Engn, Shenzhen 518060, Peoples R China
3.Southern Univ Sci & Technol, Dept Mat Sci & Engn, Shenzhen 518055, Peoples R China
4.Hong Kong Polytech Univ, Dept Ind & Syst Engn, Hong Kong 999077, Peoples R China

Hu, Jing,Wang, Zhenyu,Lyu, Linlong,et al. New insights into the reaction mechanism of sulfurized polyacrylonitrile cathode material for Li-S batteries[J]. COMPOSITES COMMUNICATIONS,2024,49.

Hu, Jing.,Wang, Zhenyu.,Lyu, Linlong.,Qin, Ning.,Li, Yingzhi.,...&Liu, Chen.(2024).New insights into the reaction mechanism of sulfurized polyacrylonitrile cathode material for Li-S batteries.COMPOSITES COMMUNICATIONS,49.

Hu, Jing,et al."New insights into the reaction mechanism of sulfurized polyacrylonitrile cathode material for Li-S batteries".COMPOSITES COMMUNICATIONS 49(2024).