文献类型：期刊文献

英文题名：Efficient immobilization and bidirectional catalysis of polysulfide conversion by FeCoP quantum dots for lithium-sulfur batteries

作者：Li, Minhui Xu, Xiao Wang, Hui Wang, Xuyun Ma, Xianguo Ren, Jianwei Wang, Rongfang

第一作者：Li, Minhui

通信作者：Wang, RF[1];Ma, XG[2];Ren, JW[3]

机构：[1]Qingdao Univ Sci & Technol, Coll Chem Engn, State Key Lab Base Ecochem Engn, Qingdao 266042, Peoples R China;[2]Guizhou Inst Technol, Sch Chem Engn, Guiyang 550003, Peoples R China;[3]Univ Johannesburg, Dept Mech Engn Sci, Cnr Kingsway & Univ Rd,Auckland Pk, ZA-2092 Johannesburg, South Africa

第一机构：Qingdao Univ Sci & Technol, Coll Chem Engn, State Key Lab Base Ecochem Engn, Qingdao 266042, Peoples R China

通信机构：corresponding author), Qingdao Univ Sci & Technol, Coll Chem Engn, State Key Lab Base Ecochem Engn, Qingdao 266042, Peoples R China;corresponding author), Guizhou Inst Technol, Sch Chem Engn, Guiyang 550003, Peoples R China;corresponding author), Univ Johannesburg, Dept Mech Engn Sci, Cnr Kingsway & Univ Rd,Auckland Pk, ZA-2092 Johannesburg, South Africa.|贵州理工学院化学工程学院;贵州理工学院;

年份：2023

外文期刊名：JOURNAL OF MATERIALS CHEMISTRY A

收录：;EI(收录号：20232014110608);Scopus(收录号：2-s2.0-85159303963);WOS:【SCI-EXPANDED(收录号:WOS:000983618100001)】；

基金：The authors would like to thank the the National Natural Science Foundation of China (51963004) and the Natural Science Foundation of Shandong Province, China (ZR2020MB024) for financial support.

语种：英文

外文关键词：Catalytic oxidation - Cathodes - Decay (organic) - Doping (additives) - Electrocatalysts - Electrolytes - Iron compounds - Lithium batteries - Lithium compounds - Lithium sulfur batteries - Nanocrystals - Semiconductor quantum dots - Sulfur compounds

摘要：Using polysulfide electrocatalysts has become an effective strategy to improve the durability of lithium-sulfur batteries (LSBs) by regulating the precipitation and dissolution of lithium sulfide in the electrolyte. In this study, an FeCoP quantum dot (FeCoP-QD)-decorated nitrogen-doped carbon nanosheet (FeCoP-NCS) composite was prepared as a sulfur host for LSBs. In comparison with the other sulfur hosts reported in the literature, the optimal FeCoP-NCS sulfur host exhibited a fantastic bidirectional catalytic effect by greatly accelerating sulfur reduction during discharge and Li2S oxidation during charging. The NCS substrate matrix with large specific surface area and high porosity provided the necessary channels for electron and ion transport. The assembled LSBs with the S@FeCoP-NCS cathode displayed a high capacity of 406 mA h g(-1) at 5C current density. Meanwhile, an excellent cycling performance with a capacity decay rate of 0.07% per cycle was observed for 500 cycles at 1C. This work demonstrated the potential of the FeCoP-NCS composite to be employed as an LSB electrode material with high-rate performance and long-term cycle stability.