A photo-cross-linkable polymeric binder for silicon anodes in lithium ion batteries

Yuwon Park, Sueun Lee, Si Hoon Kim, Bo Yun Jang, Joon Soo Kim, Seung M. Oh, Ju Young Kim, Nam Soon Choi, Kyu Tae Lee, Byeong Su Kim

Research output: Contribution to journalArticle

34 Citations (Scopus)

Abstract

A new photo-cross-linkable poly(acrylic acid) (PAA) polymer functionalized with a photoreactive benzophenone group (PAA-BP) was synthesized and examined as a binder for Si-based anodes. Upon UV irradiation, the PAA-BP binders formed an irreversible cross-linked structure through the formation of a new three-dimensional C-C bond network between the benzophenone moiety and the PAA backbone. The photo-cross-linked PAA-BP binder demonstrated a marginal volume expansion (38%) after full lithiation, compared to conventional binders and this resulted in an improved cycle performance of the Si anode over 100 cycles with a high reversible capacity of ca. 1600 mA h g-1. We attributed this phenomenon to the enhanced mechanical properties of the photo-cross-linked PAA-BP binder, which were evaluated using nanoindentation and swelling measurements.

Original languageEnglish
Pages (from-to)12625-12630
Number of pages6
JournalRSC Advances
Volume3
Issue number31
DOIs
Publication statusPublished - 2013 Aug 21

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)

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