原位复合法制备(PEO)_8LiClO_4/TiO_2聚合物电解质的研究  

Studies of (PEO)_8LiClO_4/TiO_2 Polymer Electrolyte Prepared via In-situ Compositing

作　　者：徐先华[1] 潘春跃[1] 冯庆[1] 唐爱东[1] 

机构地区：[1]中南大学化学化工学院,长沙410083

出　　处：《功能高分子学报》2004年第4期607-609,共3页Journal of Functional Polymers

摘　　要：以聚氧化乙烯／高氯酸锂复合物[(PEO)8LiClO4]为基体,通过钛酸丁酯的水解缩合反应在其中原 位生成TiO2,制备了(PEO)8LiClO4／TiO2复合聚合物电解质,采用SEM、DSC和交流阻抗方法研究了聚合物 电解质的形态、玻璃化转变温度(Tg)、结晶度(Xc)和离子导电性能。结果 表明原位生成的TiO2在基体中 分散均匀,加入TiO2后聚合物电解质体系的Tg和Xc均有所降低,而电导率明显提高,当TiO2添加量为w =0.05时电导率达到最大值5.5×10-5S·cm-1(20℃)。(PEO8LiClO4/TiO2 composite polymer electrolyte was prepared in this paper. TiO2 was formed in situ in (PEO)8LiClO4 matrix by the reaction of Ti(OC4H9)4. The morphology, the glass transition temperature , the crystallinity and the ionic conductivity of composite polymer electrolyte were studied by SEM, DSC and AC impedance spectrosco-py. It showed that TiO2 formed in-situ was uniformly dispered in matrix. Compared with the polymer electrolyte without TiO2 filler, the glass transition temperature and the crystallinity of composite polymer electrolytes are decreased, and the ionic conductivity is improved obviously. The maxmum conductivity of composite polymer electrolyte was 5. 5×10-5 S·cm-1with w =0. 05 TiO2 content at 20℃.

关 键 词：TiO2 原位生成 制备 基体 PEO 钛酸丁酯 原位复合法 高氯酸锂 聚合物电解质 最大值 

分 类 号：O631[理学—高分子化学] O643[理学—化学]