In situ assembly of MnO2 nanosheets on sulfur-embedded multichannel carbon nanofiber composites as cathodes for lithium-sulfur batteries

作     者：Jing Hu Zhenyu Wang Yu Fu Linlong Lyu Zhouguang Lu Limin Zhou 胡菁;王振宇;付宇;吕林龙;卢周广;周利民

作者机构：Department of Mechanical EngineeringThe Hong Kong Polytechnic UniversityHong KongChina Department of Materials Science and EngineeringSouthern University of Science and TechnologyShenzhen 518055China 

基　　金：supported by The Hong Kong Polytechnic University(1-ZVGH) 

出 版 物：《Science China Materials》 (中国科学（材料科学（英文版）)

年 卷 期：2020年第63卷第5期

页      码：728-738页

摘      要：Rechargeable lithium-sulfur batteries have been regarded as the promising next generation energy storage system due to their overwhelming advantages in energy ***,their practical implementations are hindered by severe capacity fading and low sulfur utilization,which are caused by polysulfide shuttling and the insulating nature of ***,sulfur-embedded porous multichannel carbon nanofibers coated with MnO2 nanosheets(CNFs@S/MnO2)are rationally designed and fabricated as cathode for lithiumsulfur *** high conductivity of porous multichannel carbon nanofibers facilitates the kinetics of electron and ion transport in the electrodes,and the porous structure encapsulates and sequesters sulfur in its interior void space to physically retard the dissolution of high-order ***,the MnO2 shell exhibits a combination of physical and chemical adsorption for high-order polysulfides,which could sequester polysulfides leaked from the carbon matrix after long-time charge/discharge cycles,resulting in enhanced cyclic *** a result,the electrode delivers a specific capacity of 1286 m A h g^-1 at 0.1 C and 728 m A h g^-1 at 3 *** the capacity could remain 774 m A h g^-1 after 600 cycles at 1 C.

主 题 词：lithium-sulfur battery carbon nanofibers MnO2 

学科分类：0808[工学-自动化类] 07[理学] 070205[070205] 08[工学] 080501[080501] 0805[工学-能源动力学] 0702[理学-物理学类] 

核心收录：

D　O　I：10.1007/s40843-019-1238-2

馆 藏 号：203885476...