硅/磷双效阻燃聚合物固态电解质的制备及性能  

Preparation and Properties of Silicon/Phosphorus Double-Effect Flame Retardant Polymer Solid Electrolyte

作　　者：贾路 刘新刚[1] 张楚虹[1] Lu Jia;Xingang Liu;Chuhong Zhang(Polymer Research Institute,State Key Laboratory of Polymer Materials Engineering,Sichuan University,Chengdu 610065,China)

机构地区：[1]四川大学高分子研究所高分子材料工程国家重点实验室(四川大学),四川成都610065

出　　处：《高分子材料科学与工程》2020年第9期138-143,149,共7页Polymer Materials Science & Engineering

基　　金：成都市产业集群协同创新项目(2017-XT00-00001-GX);四川大学专职博后基金(2020SCU12007)。

摘　　要：以含磷化合物9,10-二氢-9-氧杂-10-磷杂菲-10-氧化物(DOPO)改性3-缩水甘油氧基-丙基三甲氧基硅烷(KH560),并与高氯酸锂(LiClO4)复合,制备了一种新型硅/磷双效阻燃的聚合物固态电解质(DOPO-KH560/LiClO4)。利用傅里叶变换红外光谱、核磁共振谱、差示扫描量热、热重分析、交流阻抗谱等对该聚合物电解质进行了结构和性能研究。结果表明,DOPO-KH560/LiClO4热分解温度达263.4℃,具有优异的阻燃特性,电解质燃烧后形成致密炭层;交流阻抗结果显示电解质的锂离子电导率随LiClO4含量增加先增大后减小,室温电导率最高可达5.50×10^-6 S/cm,60℃时离子电导率可高达2.87×10^-5 S/cm。A silicon/phosphorus double-effect flame retardant polymer solid electrolyte(DOPO-KH560/LiClO4)composited with lithium perchlorate(LiClO4)was prepared from modified 3-glycidoxy-propyltrimethoxysilane(KH560)by phosphorus-containing 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide(DOPO).The structure and properties of the polymer electrolyte were studied by Fourier transform infrared spectroscopy(FT-IR),nuclear magnetic resonance spectroscopy(NMR),differential scanning calorimetry(DSC),thermogravimetric analysis(TG),electrochemical impedance spectroscopy(EIS),etc.The results show that the thermal decomposition temperature of DOPO-KH560/LiClO4 reaches 263.4℃.The electrolyte has excellent flame retardant properties and could form a dense carbon layer after combustion.EIS impedance results show that when the LiClO4 content is increased,the lithium ion conductivity of electrolyte increases first followed by a decrease with the highest value of 5.50×10^-6 S/cm achieved at room temperature,and reaches 2.87×10^-5 S/cm at 60℃.

关 键 词：聚合物电解质 硅/磷协同阻燃 锂电池 

分 类 号：TM912[电气工程—电力电子与电力传动]