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Random Binary Brush Architecture Enhances both Ionic Conductivity and Mechanical Strength at Room Temperature 被引量:1

Random Binary Brush Architecture Enhances both Ionic Conductivity and Mechanical Strength at Room Temperature
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摘要 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(Li Tf) 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. 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(Li Tf) 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.
出处 《Chinese Journal of Polymer Science》 SCIE CAS CSCD 2018年第1期78-84,共7页 高分子科学(英文版)
基金 financial support from the National Key Research and Development Program of China(2017YFA0206904,2017YFA0206900) start-up fund of Changchun Institute of Applied Chemistry,Chinese Academy of Sciences
关键词 Binary brush copolymer PEO Ionic conductivity Phase separation Binary brush copolymer PEO Ionic conductivity Phase separation
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