文献类型：期刊文献

英文题名：Heterostructured Mn clusters/N-doped carbon foams enhancing the polysulfides immobilization and catalytic conversion

作者：Huang, Zhenlong Wang, Hui Wang, Xuyun Ma, Xianguo Ren, Jianwei Wang, Rongfang

第一作者：Huang, Zhenlong

机构：[1] State Key Laboratory Base for Eco-Chemical Engineering, College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao, 266042, China; [2] School of Chemical Engineering, Guizhou Institute of Technology, Guiyang, 550003, China; [3] Department of Mechanical Engineering Science, University of Johannesburg, Cnr Kingsway and University Roads, Auckland Park, Johannesburg, 2092, South Africa

第一机构：State Key Laboratory Base for Eco-Chemical Engineering, College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao, 266042, China

年份：2022

卷号：924

外文期刊名：Journal of Alloys and Compounds

收录：EI(收录号：20223212539737);Scopus(收录号：2-s2.0-85135304703)

基金：The authors would like to thank the financial supports from the National Natural Science Foundation of China ( 51963004 ) , the Natural Science Foundation of Shandong Province , China ( ZR2020MB024 ), and the Open Project Program of Guangdong Provincial Key Laboratory of Electronic Functional Materials and Devices, Huizhou University China ( EFMD2021001Z ).

语种：英文

外文关键词：Decay (organic) - Electric discharges - Electrodes - Foams - Lithium batteries - Lithium compounds - Lithium sulfur batteries - Manganese compounds - Polysulfides - Sodium chloride

摘要：Lithium-sulfur batteries (LSBs) are favored for their high theoretical energy capacity and low production costs. However, their wide applications are currently challenged by the polysulfide shuttle effect and slow redox reactions resulting from the poor polysulfides immobilization-conversion kinetics in the sulfur cathodes. In this work, the heterostructure Mn Clusters/N-doped Carbon Foams composite catalyst was prepared by using the molten NaCl as template. The optimal electrode sample exhibited the improved chemisorption and catalytic conversion of the polysulfides. Sequentially, the polysulfide shuttle effect and volume expansion during the reaction were effectively alleviated. As a result, the assembled sulfur electrode achieved a discharge specific capacity of 505.8 mA h g?1 after 300 cycles at 1 C with an average capacity decay rate of only 0.065 % per cycle. ? 2022 Elsevier B.V.