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

作     者：Yu-Feng Lyu Zhi-Jie Zhang Chang Liu Zhi Geng Long-Cheng Gao Quan Chen 

作者机构：Key Laboratory of Bio-inspired Smart Interfacial Science and Technology of Ministry of EducationSchool of Chemistry and EnvironmentBeihangUniversityBeijing 100191China State KeyLaboratory of Polymer Physics and ChemistryChangchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022China 

出 版 物：《Chinese Journal of Polymer Science》 (高分子科学（英文版）)

年 卷 期：2018年第36卷第1期

页      面：78-84页

核心收录：

学科分类：081704[工学-应用化学] 07[理学] 0817[工学-化学工程与技术] 08[工学] 070305[理学-高分子化学与物理] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 

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 

主　　题：Binary brush copolymer PEO Ionic conductivity Phase separation 

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.