Cross-linked siloxane-based copolymer binder with combined hardness and softness for stable silicon anodes in Li-ion batteries

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

4 Scopus Citations
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Author(s)

  • Jiyuan Yang
  • Minghui Shi
  • Qunchao Zhang
  • Jun You
  • Dean Shi
  • Tao Jiang

Detail(s)

Original languageEnglish
Pages (from-to)20126–20137
Journal / PublicationJournal of Materials Science
Volume50
Issue number36
Online published11 Oct 2021
Publication statusPublished - Dec 2021

Abstract

Silicon has become one of the most emerging anode materials in Li-ion batteries due to its excellent specific capacity. The incorporation of binders can significantly reduce the volume expansion of silicon during the cycling process. In this work, a novel type of cross-linked siloxane-based copolymer, poly (tert-butyl acrylate-co-vinyl tri-lactate ethyl silane) (TBA-VTLES) was designed and utilized as the binder for the silicon anode in Li-ion batteries to alleviate the inner stress of adverse volume changes and improve the electrochemical performance. The hard TBA and soft VTLES were interwoven into a 3D network to achieve the adhesive action via free radical polymerization. The soft chains in TBA-VTLES can enhance the cohesion of the copolymer to disperse residual stress, and thus avoid structural damage during lithiation. Meanwhile, the rigid chains can provide sufficient mechanical strength to maintain the integrity of silicon anode during de-lithiation. Moreover, the presence of TBA-VTLES can improve the adhesive strength between the copper collector and the binder. This novel type of siloxane-based copolymer binder with hardness and softness provides a feasible way to improve the silicon anode performance of Li-ion batteries. Graphical abstract: [Figure not available: see fulltext.] The synthesized cross-linked copolymer binder can improve the interfacial interaction and electrochemical performance of Si anode-- present in Graphical abstract figure-- need or not.

Citation Format(s)

Cross-linked siloxane-based copolymer binder with combined hardness and softness for stable silicon anodes in Li-ion batteries. / Yang, Jiyuan; Shi, Minghui; Wu, Wei et al.
In: Journal of Materials Science, Vol. 50, No. 36, 12.2021, p. 20126–20137.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review