A bipolar modified separator using TiO2 nanosheets anchored on N-doped carbon scaffold for high-performance Li–S batteries

作     者：Na Li Fei Chen Xiangtao Chen Zhongxu Chen Yang Qi Xiaodong Li Xudong Sun Na Li;Fei Chen;Xiangtao Chen;Zhongxu Chen;Yang Qi;Xiaodong Li;Xudong Sun

作者机构：Key Laboratory for Anisotropy and Texture of Materials(Ministry of Education)School of Materials Science and EngineeringNortheastern UniversityShenyang 110819China College of Environmental and Chemical EngineeringDalian UniversityDalian 116622China 

出 版 物：《Journal of Materials Science & Technology》 (材料科学技术（英文版）)

年 卷 期：2020年第52卷第20期

页      面：152-158页

核心收录：

学科分类：0808[工学-电气工程] 07[理学] 0817[工学-化学工程与技术] 0806[工学-冶金工程] 070205[理学-凝聚态物理] 08[工学] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 0802[工学-机械工程] 0801[工学-力学（可授工学、理学学位）] 0702[理学-物理学] 

基　　金：This work was supported financially by the National Natural Science Foundation of China(No.51602044) the Fundamental Research Funds for the Central Universities(No.N170205021) 

主　　题：Lithium-sulfur batteries N-doped carbon Separator TiO2 Nanosheets 

摘      要：Lithium-sulfur batteries hold promise for next generation batteries due to their high theoretical energy density and low ***,the rapid capacity fading caused by the shuttle of polysulfide between two electrodes severely hinders the practical application of Li-S *** address the issue,we reported a three-dimensional heterostructured TiO2 nanosheets/N-doped carbon(TO/NC),which is coated on a commercial polypro pylene(PP) separator,as an efficient barrier for Li-S *** TO/NC coating layer provides a bipolar chemical adsorption of lithium polysulfides(LiPSs) via TiO2 nanosheets with exposed(001) facets and N-doped carbon,showing high trapping capacity and remarkable electrocatalytic activity for *** slurry-bladed carbon black/sulfur cathode with 64 wt% sulfur offers outstanding performance with an initial capacity of 1314 mAh g^-1 at 0.2 *** 900 cycles,the cell still maintains the capacity of 448 mA h g^-1 at a 1 C rate with a degradation rate of only 0.055% per *** separator reported in this work holds great promise for the development of high-energy Li-S batteries.