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Issue 31, 2013
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A photo-cross-linkable polymeric binder for silicon anodes in lithium ion batteries

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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.

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

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Publication details

The article was received on 16 May 2013, accepted on 12 Jun 2013 and first published on 01 Jul 2013


Article type: Communication
DOI: 10.1039/C3RA42447B
Citation: RSC Adv., 2013,3, 12625-12630
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    A photo-cross-linkable polymeric binder for silicon anodes in lithium ion batteries

    Y. Park, S. Lee, S. Kim, B. Y. Jang, J. S. Kim, S. M. Oh, J. Kim, N. Choi, K. T. Lee and B. Kim, RSC Adv., 2013, 3, 12625
    DOI: 10.1039/C3RA42447B

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