Flexible Silicon/Titanium Dioxide/Reduced Graphene Oxide Self-Standing Electrode with High Performance and High Stability for Lithium-Ion Batteries

Peng Su, Yu Zhou, Jian Wu, Jin Shao, Liming Shen, Ningzhong Bao

科研成果: 期刊稿件文章同行评审

6 引用 (Scopus)

摘要

The great volume expansion and unstable nature of the solid electrolyte interface film of silicon (Si) are central issues that obstruct the advancement of the Si-based electrode despite its high theoretical capacity and abundant resources. Here a kind of flexible silicon/titanium dioxide/reduced graphene oxide (Si/TiO2/rGO) self-standing electrode is constructed without the assistance of a binder and conductive agent. Briefly, the Si nanoparticle is coated with TiO2 via a sol-gel process, and then the core-shell structured Si/TiO2 is assembled with GO using chitosan as the cross-linker followed by freeze-drying, pressing, and annealing at an ammonia/argon (NH3/Ar) atmosphere. In this structure, TiO2 and rGO provide dual protection for Si, and a continuous conductive path is formed. Additionally, nitrogen doping by NH3 and chitosan further strengthens the lithium storage performance. The fabricated Si/TiO2/rGO film electrode demonstrates excellent rate performance over a broad range of current densities and keeps a reversible capacity of 1333.8

源语言英语
页(从-至)1422-1431
页数10
期刊Industrial and Engineering Chemistry Research
63
3
DOI
出版状态已出版 - 24 1月 2024

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