Super P and MoO_(2)/MoS_(2)co-doped gradient nanofiber membrane as multi-functional separator for lithium–sulfur batteries  

作　　者：Xin Liang Dong-Qing Zhao Qian-Qian Huang Sheng Liang Li-Li Wang Lei Hu Ling-Li Liu Kun-Hong Hu Chong-Hai Deng Sheng Cheng Er-Tao Zhu Hua-Xia Deng 

机构地区：[1]School of Energy Materials and Chemical Engineering,LIB Technology Center of Anhui Province,Hefei University,Hefei 230601,China [2]Instrumental Analysis Centre,Hefei University of Technology,Hefei 230009,China [3]Hefei Youngy Energy Materials Co.,Ltd.,Hefei 230000,China [4]Department of Modern Mechanics,University of Science and Technology of China,Hefei 230026,China

出　　处：《Rare Metals》2024年第9期4263-4273,共11页稀有金属（英文版）

基　　金：financially supported by the Anhui Provincial Natural Science Foundation(Nos.2208085ME108,1708085QE98 and 2008085QE27);University Synergy Innovation Program of Anhui Province(No.GXXT-2023-024);Project for Cultivating Academic(or Disciplinary)Leaders(No.DTR2023043);Talent Scientific Research Foundation of Hefei University(No.23RC29);National Natural Science Foundation of China(Nos.21606065 and 51902079);University Natural Science Research Project of Anhui Province(Nos.KJ2021A1016,2022AH051788 and2022AH051792);the Natural Science Research Project of Education Department of Anhui Province(No.2022AH010096);University excellent talent program of Anhui Province(Nos.gxyqZD2021136and qxyq2021228);the Top Discipline Talents Foundation of Anhui Province Educational Committee(No.gxbjZD2021085);the Key Projects of Research and Development Program of Anhui Provence(No.201904b11020040)。

摘　　要：Lithium-sulfur battery is one of the most promising battery systems for industrialization due to its high theoretical specific capacity and high energy density.Nonetheless,the"shuttle effect"has restrained the advancement of lithium-sulfur batteries.In this work,a gradient-structured nanofiber membrane with pure gelatin on one side and Super P-MoO_(2)/MoS_(2)-gelatin on the other side was created using a multi-step electrostatic spinning technique,which was applied for multi-functional separator for lithium-sulfur batteries.The pure gelatin layer facing the anode side primarily homogenizes the lithium flux,whereas the Super P-MoO_(2)/MoS_(2)-gelatin layer facing the cathode side primarily adsorbs polysulfides by physical and chemical adsorption and enhancing polysulfide conversion efficiency.The findings demonstrate that even after 150 cycles at 0.2C,the lithium-sulfur battery can still sustain a discharge-specific capacity of 572.3 mAh·g^(-1).When used with Li||Li symmetric batteries,it has a cycle life of more than 1200 h.The commercialization of lithium-sulfur batteries is given a fresh idea by this straightforward preparation technique.

关 键 词：MoO_(2)/MoS_(2) NANOFIBER Membrane Li-S battery 

分 类 号：TM912[电气工程—电力电子与电力传动] TB383.2[一般工业技术—材料科学与工程]