title: Immobilizing Polysulfides with MXene-Functionalized Separators for Stable Lithium-Sulfur Batteries.
abstract: Lithium-sulfur batteries have attracted increasing attention as one of the most promising candidates for next-generation energy storage systems. However, the poor cycling performance and the low utilization of sulfur greatly hinder its practical applications. Here we report the improved performance of lithium-sulfur batteries by coating Ti3C2TxMXene nanosheets (where T stands for the surface termination, such as -O, -OH, and/or -F) on commercial "Celgard" membrane. In favor of the ultrathin two-dimensional structure, the Ti3C2TxMXene can form a uniform coating layer with a minimum mass loading of 0.1 mg cm-2and a thickness of only 522 nm. Owing to the improved electric conductivity and the effective trapping of polysulfides, the lithium-sulfur batteries with MXene-functionalized separators exhibit superior performance including high specific capacities and cycling stability.
authors.affiliation: Centre for Clean Energy Technology, Faculty of Science, University of Technology Sydney , Sydney, New South Wales 2007, Australia.|State Key Laboratory of Metastable Materials Science and Technology, College of Environmental and Chemical Engineering, Yanshan University , Qinhuangdao 066004, China.
authors.forename: Jianjun
authors.initials: J
authors.lastname: Song
authors.affiliation: Centre for Clean Energy Technology, Faculty of Science, University of Technology Sydney , Sydney, New South Wales 2007, Australia.
authors.forename: Dawei
authors.initials: D
authors.lastname: Su
authors.affiliation: Centre for Clean Energy Technology, Faculty of Science, University of Technology Sydney , Sydney, New South Wales 2007, Australia.
authors.forename: Xiuqiang
authors.initials: X
authors.lastname: Xie
authors.affiliation: Centre for Clean Energy Technology, Faculty of Science, University of Technology Sydney , Sydney, New South Wales 2007, Australia.
authors.forename: Xin
authors.initials: X
authors.lastname: Guo
authors.affiliation: Centre for Clean Energy Technology, Faculty of Science, University of Technology Sydney , Sydney, New South Wales 2007, Australia.
authors.forename: Weizhai
authors.initials: W
authors.lastname: Bao
authors.affiliation: State Key Laboratory of Metastable Materials Science and Technology, College of Environmental and Chemical Engineering, Yanshan University , Qinhuangdao 066004, China.
authors.forename: Guangjie
authors.initials: G
authors.lastname: Shao
authors.affiliation: Centre for Clean Energy Technology, Faculty of Science, University of Technology Sydney , Sydney, New South Wales 2007, Australia.|College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics , Nanjing, China.
authors.forename: Guoxiu
authors.initials: G
authors.lastname: Wang
keywords: MXene; Ti3C2Tx; lithium−sulfur batteries; polysulfides; separator