文献类型：期刊文献

英文题名：Sub-nanometer cobalt clusters embedded carbon networks to promote the kinetics of polysulfide conversion

作者：Ma, Xianguo Wang, Lan Li, Yue Ji, Shan Linkovc, Vladimir Wang, Hui Gao, Ruili

第一作者：马先果

通信作者：Wang, L[1];Gao, RL[2]

机构：[1]Guizhou Inst Technol, Sch Chem Engn, Guiyang 550003, Peoples R China;[2]Jiaxing Univ, Pinghu Normal Coll, Jiaxing 314001, Peoples R China;[3]Qingdao Univ Sci & Technol, Coll Chem Engn, State Key Lab Base Ecochem Engn, Qingdao 266042, Peoples R China;[4]Jiaxing Univ, Coll Biol Chem Sci & Engn, Jiaxing 314001, Peoples R China;[5]Univ Western Cape, South African Inst Adv Mat Chem, ZA-7535 Cape Town, South Africa

第一机构：贵州理工学院化学工程学院

通信机构：corresponding author), Jiaxing Univ, Pinghu Normal Coll, Jiaxing 314001, Peoples R China;corresponding author), Qingdao Univ Sci & Technol, Coll Chem Engn, State Key Lab Base Ecochem Engn, Qingdao 266042, Peoples R China.

年份：2023

卷号：967

外文期刊名：JOURNAL OF ALLOYS AND COMPOUNDS

收录：;EI(收录号：20233414588739);Scopus(收录号：2-s2.0-85168081878);WOS:【SCI-EXPANDED(收录号:WOS:001064951200001)】；

基金：The authors would like to thank the National Natural Science Foundation of China (51963004), the Natural Science Foundation of Shandong Province of China (ZR2020MB024) and the Open Project Program of Guangdong Provincial Key Laboratory for Electronic Functional Materials and Devices, Huizhou University (No. EFMD2021001Z) for financially supporting this work.

语种：英文

外文关键词：N -doped carbon; Co cluster; Sulfur fixation; Cathode; Lithium -sulfur battery

摘要：The sluggish oxidation-reduction kinetics of sulfur and the shuttle effect of polysulfides are the bottlenecks restricting the practical application of lithium-sulfur batteries. In this study, subnanometer cobalt clusters were embedded into the cross-linked network of carbon sheets framework as high-efficiency sulfur host materials to promote the kinetics of polysulfides conversion for lithium-sulfur batteries. In such composite structure, the carbon network provides a rapid electron transfer pathway for interfacial electrochemical reaction. Co and N atoms can chemisorb polysulfides by forming Co-S and Li-N bonds with polysulfides, and catalyze the conversion of polysulfides. Such structure exhibits excellent rate performance and cycle stability during the cycle of lithiumsulfur battery. The capacity decay rate per cycle is only 0.061% for 500 cycles at 1 C, and the capacity retention rate is 69.4%. The composite structure developed in this work is a promising and high-efficiency sulfur host for lithium-sulfur batteries.