原位复合法制备P(AALi-AN-BA)/LiX/SiO_2聚合物电解质及其导电性  

In Situ Preparation and Conduction Properties of P(AALi-AN-BA)/LiX/SiO_2 Composite Polymer Electrolyte

作　　者：潘春跃[1] 巢猛[1] 王丽君[1] 戴潇燕[1] 徐先华[1] 

机构地区：[1]中南大学化学化工学院功能有机高分子研究所,湖南长沙410083

出　　处：《高分子材料科学与工程》2006年第4期158-161,共4页Polymer Materials Science & Engineering

摘　　要：共聚单体丙烯酸锂(AAL i)、丙烯腈(AN)、丙烯酸丁酯(BA)聚合的同时前驱体正硅酸乙酯(TEOS)水解缩合,在聚合物基体原位生成S iO2粒子,添加复盐L iX(L iC lO4-L iNO3-L iB r共熔盐)后制备了P(AAL i-AN-BA)/L iX/S iO2复合聚合物电解质,用IR和DTA-TG对其进行了表征,采用交流阻抗法研究了电解质膜的离子导电性能。结果表明,原位复合S iO2后体系的热稳定性提高,锂离子传输表观活化能Ea明显降低,电导率增大,当S iO2添加量为10%,L iX含量为75%时,体系的室温电导率达到最大值6.26×10-4S/cm(20℃)。P （AALi-AN-BA）/LiX/SiO2 composite polymer electrolyte was prepared by in situ reactions that involve the simultaneous formation of the polymer matrix and inorganic particles. The terpolymer was synthesized by solution copolymerization and silica was produced in situ by the reaction of Si（OC2H5）4. Compared with the polymer electrolyte without SiO2 filler, P（AALi- AN-BA）/LiX/SiO2 exhibits good thermal stability and significant increase in the ionic conductivity characterized by DTA-TG and AC impedance spectroscopy. The results indicate that SiO2 can reduce the ion transfer activation energy（Ea） in the system. The room temperature conductivity of the composite polymer electrolyte shows a maximun value of 6.26×10^-4S/cm with the mass ratio of LiX equal to 75% and a 10% of SiO2.

关 键 词：原位复合 SIO2 聚合物电解质 电导率 

分 类 号：O631.23[理学—高分子化学]