Issue 31, 2013
From the journal:

RSC Advances

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

Yuwon Park,‡ab   Sueun Lee,‡a   Si-Hoon Kim,c   Bo Yun Jang,d   Joon Soo Kim,d   Seung M. Oh,b   Ju-Young Kim,c   Nam-Soon Choi,a   Kyu Tae Lee*a  and  Byeong-Su Kim*a  

* Corresponding authors

a Interdisciplinary School of Green Energy and KIER-UNIST Advanced Center for Energy, Ulsan National Institute of Science and Technology (UNIST), 100 Banyeon-ri, Eonyang-eup, Ulju-gun, Ulsan 689-798, South Korea
E-mail: ktlee@unist.ac.kr, bskim19@unist.ac.kr

b School of Chemical and Biological Engineering, Seoul National University, 1 Gwanangno, Gwanak-gu, Seoul 151-742, South Korea

c School of Mechanical and Advanced Materials Engineering, Ulsan National Institute of Science and Technology (UNIST), 100 Banyeon-ri, Eonyang-eup, Ulju-gun, Ulsan 689-798, South Korea

d Korea Institute of Energy Research (KIER), Daejeon 305-343, South Korea

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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Article information

DOI
https://doi.org/10.1039/C3RA42447B
Article type
Communication
Submitted
16 May 2013
Accepted
12 Jun 2013
First published
01 Jul 2013

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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