• 文献标题:   Microstructure dependent behavior of the contact interface on porous graphene wrapped Si anodes for Li-ion batteries
  • 文献类型:   Article
  • 作  者:   MA ZH, WANG CJ, LI AQ, WANG LJ, CHEN GR, MIAO Y, DANG T, WANG YF, CHANG EY, FAN TC
  • 作者关键词:   silicon, porous graphene, electrochemical performance, li ion batterie
  • 出版物名称:   ELECTROCHIMICA ACTA
  • ISSN:   0013-4686 EI 1873-3859
  • 通讯作者地址:  
  • 被引频次:   0
  • DOI:   10.1016/j.electacta.2023.141976 EA FEB 2023
  • 出版年:   2023

▎ 摘  要

Si/carbon composites are attractive anode materials for rechargeable Li-ion batteries (RLIBs), which combine the advantages of Si and graphene. Designing special Si/carbon structure with intimate contact interface and abundant void space for fast ion transmission is an effective strategy for enhancing cyclability and rate perfor-mance of the electrode materials. Inspired by the structure of fishnet, here we fabricate a binder-free and self -standing Si@porous-graphene (Si@PGN(60)) composite with nano silicon particles encapsulated in porous graphene sheets. The obtained Si@PGN(60) sample exhibits many favourable features for high performance Si/carbon anodes, including improved Si/graphene contact interface, and abundant void space for fast ion transmission. Tanks to the unique structure, the resultant Si@PGN60 anode presents remarkably improved capacity reaching 1839.9 mA h g(-1) at 300 mA g(-1), and excellent cycling performance (734 mA h g(-1) at a high current density of 3000 mA g(-1)).