Nitrogen doped hollow carbon nanospheres as efficient polysulfide restricted layer on commercial separators for high-performance lithium-sulfur batteries

作     者：Yue Zhao Zhi Gu Wei Weng Dan Zhou Ziqiang Liu Wentong Fan Shungui Deng Hao He Xiayin Yao Yue Zhao;Zhi Gu;Wei Weng;Dan Zhou;Ziqiang Liu;Wentong Fan;Shungui Deng;Hao He;Xiayin Yao

作者机构：Key Laboratory of Material PhysicsMinistry of EducationSchool of Physics and MicroelectronicsZhengzhou UniversityZhengzhou 450001China Ningbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingbo 315201China Department of Chemical and Environmental EngineeringFaculty of Science and EngineeringUniversity of NottinghamNingbo 315100China Center of Materials Science and Optoelectronics EngineeringUniversity of Chinese Academy of SciencesBeijing 100049China Chongqing Key Laboratory of Extraordinary Bond Engineering and Advanced Materials TechnologyCollege of Materials Science and EngineeringYangtze Normal UniversityChongqing 408100China 

出 版 物：《Chinese Chemical Letters》 (中国化学快报（英文版）)

年 卷 期：2023年第34卷第2期

页      面：613-617页

核心收录：

学科分类：081702[工学-化学工艺] 0808[工学-电气工程] 07[理学] 08[工学] 0817[工学-化学工程与技术] 070205[理学-凝聚态物理] 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] 0702[理学-物理学] 

基　　金：supported by the National Natural Science Foundation of China (Nos. U1964205, 51872303, 52172253) Zhejiang Provincial Natural Science Foundation of China (No. LD18E020004) Ningbo S&T Innovation 2025 Major Special Programme (Nos. 2019B10044, 20211ZDYF020077) Zhejiang Provincial Key R&D Program of China (No. 2022C01072) Chongqing Research Program of Basic Research and Frontier Technology (No. cstc2019jcyjmsxm X0510) Youth Innovation Promotion Association CAS (No. 2017342) 

主　　题：Nitrogen doped hollow carbon nanospheres Separator modification Shuffle effect Polysulfides Lithium-sulfur batteries 

摘      要：The polysulfide shuttle limits the development of lithium-sulfur(Li-S) batteries with high energy density and long lifespan. Herein, nitrogen doped hollow carbon nanospheres(NHCS) derived from polymerization of dopamine on SiO_(2)nanospheres are employed to modify the commercial polypropylene/polyethylene/polypropylene tri-layer separators(PP/PE/PP@NHCS). The abundant nitrogen heteroatoms in NHCS exhibit strong chemical adsorption toward polysulfides, which can effectively suppress the lithium polysulfides shuttle and further enhance the utilization of active sulfur. Lithium-sulfur batteries employing the PP/PE/PP@NHCS deliver an initial discharge capacity of 1355 mAh/g and retain high capacity of 921 mAh/g after 100 cycles at 0.2 C. At a high rate of 2 C, the lithium-sulfur batteries exhibit capacity of 461 mAh/g after 1000 cycles with a capacity fading rate of 0.049% per cycle. This work demonstrates that the NHCS coated PP/PE/PP separator is promising for future commercial applications of lithium-sulfur batteries with improved electrochemical performances.