苯基硅树脂改性锂离子电池聚合物电解质的电导率和热稳定性

Improving the conductivity and thermal stability of polymer electrolytes for lithium-ion battery with hybrid poly( phenylsilsesquioxane) spheres

通过水解缩聚法合成苯基硅树脂微球(PPSQ),使用TEM、TGA、XRD、XPS等方法对PPSQ进行表征,结果表明,PPSQ的结构规整,粒径分布均匀,且耐热性能非常优异;以聚(甲基丙烯酸甲酯-醋酸乙烯酯)[P(MMA-VAc)]为基体制备PPSQ/P(MMAVAc)凝胶型聚合物电解质,研究了PPSQ的加入对聚合物电解质性能产生的影响。热失重测试和电导率测试结果表明,当PPSQ含量达到7%(质量分数)时,体系的热失重曲线向高温方向偏移,同时电导率也达到最大值3.17×10-5S/cm,聚合物电解质的综合性能达到最佳。

The organic-inorganic hybrid poly (phenylsilsesquioxane)spheres (PPSQ)were prepared and the structure of PPSQ was confirmed by transmission electron microscope (TEM),thermogravimetry analysis (TGA),the X-ray diffraction analysis (XRD)and X-ray photoelectron spectroscopy (XPS).The interaction be-tween PPSQ and poly(methyl methacrylate-vinyl acetate)was investigated by Fourier transform infrared spec-tra (FT-IR)and XRD.The composite electrolytes using poly(methyl methacrylate-vinyl acetate)and organic-inorganic hybrid spheres of poly (phenylsilsesquioxane)were prepared.The results indicated that PPSQ en-hanced the ionic conductivity and thermal stability of prepared composite electrolyte.