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A facile random copolymer strategy to achieve highly conductive polymer gel electrolytes for electrochemical applications

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Abstract

A facile random copolymer strategy based on poly(styrene-ran-methyl methacrylate) (PS-r-PMMA) is proposed for the preparation of highly conductive and mechanically elastic solid-state gel electrolytes. In contrast to previous random copolymers serving as polymer hosts, PS-r-PMMA can be readily synthesized by one-pot reversible additional–fragmentation chain transfer (RAFT) polymerization. PS-r-PMMA and the ionic liquid 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide ([EMI][TFSI]) are blended to fabricate physically cross-linked ion gel electrolytes. We systematically investigate the dependence of gel properties on experimental variables, such as the styrene fraction and molecular weight of PS-r-PMMAs, and the ion gel composition. The physical properties of the gels are optimized to simultaneously exhibit good ionic conductivity (∼0.98 mS cm−1) and mechanical resilience (∼7.2 × 104 Pa) at room temperature. The versatility of the PS-r-PMMA-based gels as a solid-state electrolyte platform is successfully demonstrated by applying it in two types of electrochemical devices, electrochemiluminescent (ECL) and electrochromic (EC) displays. These results imply that PS-r-PMMAs can be easily synthesized without post reactions and are a simple and effective polymer host for high-performance ion gel electrolytes for diverse electrochemical applications.

Graphical abstract: A facile random copolymer strategy to achieve highly conductive polymer gel electrolytes for electrochemical applications

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Publication details

The article was received on 09 Oct 2018, accepted on 28 Nov 2018 and first published on 30 Nov 2018


Article type: Paper
DOI: 10.1039/C8TC05092A
Citation: J. Mater. Chem. C, 2019, Advance Article
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    A facile random copolymer strategy to achieve highly conductive polymer gel electrolytes for electrochemical applications

    Y. M. Kim, D. G. Seo, H. Oh and H. C. Moon, J. Mater. Chem. C, 2019, Advance Article , DOI: 10.1039/C8TC05092A

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