Citation: Yu-Feng Lyu, Zhi-Jie Zhang, Chang Liu, Zhi Geng, Long-Cheng Gao, Quan Chen. Random Binary Brush Architecture Enhances both Ionic Conductivity and Mechanical Strength at Room Temperature[J]. Chinese Journal of Polymer Science, ;2018, 36(1): 78-84. doi: 10.1007/s10118-018-2016-z shu

Random Binary Brush Architecture Enhances both Ionic Conductivity and Mechanical Strength at Room Temperature

Yu-Feng Lyu ^a,† ,
Zhi-Jie Zhang ^b,† ,
Chang Liu ^b ,
Zhi Geng ^a ,
Long-Cheng Gao ^a,, ,
Quan Chen ^b,,

a.
Key Laboratory of Bio-inspired Smart Interfacial Science and Technology of Ministry of Education, School of Chemistry and Environment, Beihang University, Beijing 100191, China
b.
State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China

Corresponding author: Long-Cheng Gao, lcgao@buaa.edu.cn Quan Chen, qchen@ciac.ac.cn

^†

Received Date: 26 June 2017
Accepted Date: 2 August 2017
Available Online: 30 October 2017

The ionic conductivity and the mechanical strength are two key factors for the performance of poly(ethylene oxide) (PEO) based polyelectrolytes. However, crystallized PEO suppresses ion conductivity at low temperature and melted PEO has low mechanical strength at high temperature. Here, random binary brush copolymer composed of PEO- and polystyrene (PS)-based side chains is synthesized. PEO crystallinity is suppressed by the introduction of PS brushes. Doping with lithium trifluoromethanesulfonate (LiTf) induces microphase separation. Due to a random arrangement of the brushes, the microphase segregation is incomplete even at high salt loading, which provides both high ionic conductivity and high mechanical strength at room temperature. These results provide opportunities for the design of polymeric electrolytes to be used at room temperature.
- Binary brush copolymer,
- PEO,
- Ionic conductivity,
- Phase separation
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