Bao Weizhai, Xie Xiuqiang, Xu Jing, Guo Xin, Song Jianjun, Wu Wenjian, Su Dawei, Wang Guoxiu
Centre for Clean Energy Technology, Faculty of Science, University of Technology Sydney, Broadway, Sydney, NSW 2007, Australia.
Department of Materials Science and Engineering, Dongguan University of Technology, Dongguan, 523808, P. R. China.
Chemistry. 2017 Sep 12;23(51):12613-12619. doi: 10.1002/chem.201702387. Epub 2017 Aug 16.
Three-dimensional metal carbide MXene/reduced graphene oxide hybrid nanosheets are prepared and applied as a cathode host material for lithium-sulfur batteries. The composite cathodes are obtained through a facile and effective two-step liquid-phase impregnation method. Owing to the unique 3 D layer structure and functional 2 D surfaces of MXene and reduced graphene oxide nanosheets for effective trapping of sulfur and lithium polysulfides, the MXene/reduced graphene oxide/sulfur composite cathodes deliver a high initial capacity of 1144.2 mAh g at 0.5 C and a high level of capacity retention of 878.4 mAh g after 300 cycles. It is demonstrated that hybrid metal carbide MXene/reduced graphene oxide nanosheets could be a promising cathode host material for lithium-sulfur batteries.
制备了三维金属碳化物MXene/还原氧化石墨烯杂化纳米片，并将其用作锂硫电池的正极主体材料。通过简便有效的两步液相浸渍法获得复合正极。由于MXene和还原氧化石墨烯纳米片独特的三维层状结构和功能性二维表面能够有效捕获硫和多硫化锂，MXene/还原氧化石墨烯/硫复合正极在0.5 C下具有1144.2 mAh g的高初始容量，并且在300次循环后具有878.4 mAh g的高容量保持率。结果表明，杂化金属碳化物MXene/还原氧化石墨烯纳米片可能是一种有前途的锂硫电池正极主体材料。
