文献类型：期刊文献

英文题名：Using sp2 N atom anchoring effect to prepare ultrafine vanadium nitride particles on porous nitrogen-doped carbon as cathode for lithium-sulfur battery

作者：Sun, Chaoyang Ji, Shan Ma, Xianguo Wang, Hui Wang, Xuyun Linkov, Vladimir Wang, Rongfang

第一作者：Sun, Chaoyang

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] College of Biological, Chemical Science and Engineering, Jiaxing University, Jiaxing, 314001, China; [3] School of Chemical Engineering, Guizhou Institute of Technology, Guiyang, 550003, China; [4] South African Institute for Advanced Materials Chemistry, University of the Western Cape, Cape Town, 7535, 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

通信机构：College of Biological, Chemical Science and Engineering, Jiaxing University, Jiaxing, 314001, China

年份：2022

卷号：623

起止页码：306-317

外文期刊名：Journal of Colloid and Interface Science

收录：EI(收录号：20222112132246);Scopus(收录号：2-s2.0-85130081303)

语种：英文

外文关键词：Lithium batteries - Nitrides - Particle size - Doping (additives) - Nitrogen - Vanadium compounds - Carbon - Porous materials - Atoms - Transition metals

摘要：Porous carbon-supported transition metals and their compounds have attracted much attention as sulfur host materials for cathodes of lithium-sulfur batteries, due to their high chemisorption capacity and ability to catalyze the conversion of polysulfides. However, actual activity of these materials is not very high because of low specific surface areas of transition metal compounds synthesized at high temperatures. In this study, ultra-fine vanadium nitride particles with an average particle size of ca. 4 nm (VN/M/NC) are successfully grown on the surface of nitrogen-doped three-dimensional carbon using sp2 nitrogen atoms, resulting from melamine pyrolysis in the presence of ammonium metavanadate, as anchor points to lock vanadium atoms in the VN/M/NC material. When used as a cathode for lithium-sulfur battery, VN/M/NC demonstrates initial discharge specific capacity of 1080 mAh g?1 at 0.2 C, and retains a discharge capacity of 475 mAh g?1 at a high rate of 2 C. With capacity attenuation of only 0.037% per cycle after 500 cycles at 1 C, the newly obtained VN/M/NC can be a promising cathode material for lithium-sulfur batteries. ? 2022