Coordination Engineering Construction of Si@ZnS@N, S‐Doped Reduced Graphene Oxide Nanocomposite as Anode Material with Enhanced Lithium Storage Performance. Issue 6 (5th April 2019)

• Record Type: Journal Article
• Authors: Liu, Guilong; Liu, Xianming; Li, Xiaorui; Jin, Xueyang; Xiao, Haiyan; Wu, Naiteng; Guo, Donglei; Tang, Siye
• Is Part Of: Energy technology. Volume 7:Issue 6(2019:Jun.)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2019-04-05
• Subjects: lithium‐ion batteries -- metal–organic frameworks -- silicon anodes -- zinc sulfide; Energy development -- Periodicals; Power resources -- Periodicals; 333.79
• DOI: 10.1002/ente.201900186
• Languages: English
• ISSNs: 2194-4288

Abstract

Abstract : Silicon (Si) has been extensively studied as an anode material for lithium‐ion batteries due to its high specific capacity. However, the low conductivity and huge volume expansion of Si during cycles usually result in poor cyclic life span and poor rate performance. Herein, based on coordination engineering, a novel composite, i.e., Si@ZnS@ N, S‐doped reduced graphene oxide (rGO) is fabricated by the one‐step vulcanization of Si@ZIF‐8@rGO. In the composite material, N, S‐doped rGO can significantly improve the electronic conductivity, ZnS leads to the improvement in the ionic conductivity of the material, and the high capacity of ZnS improves the capacity of the composite material. As a result, the material exhibits good electrochemical performance with a high specific capacity of 1218 mAh g −1 even after 500 cycles at 0.5 A g −1 . Abstract : Si@ZnS@rGO is prepared by the one‐step vulcanization of Si@ZIF‐8@rGO. In the composite, similar electrochemical behaviors of Si and ZnS make ZnS a good buffer layer for Si during charge/discharge; the high specific capacity of ZnS helps upgrade the capacity of the composite, and the ZnS shell enhances the ionic conductivity of the composite material, which results in a good electrochemical performance.