阻燃聚氨酯基固态聚合物电解的制备

Preparation of flame-retardant polyurethane-based solid polymer electrolyte

摘要:

摘要：以聚己二酸-1,4-丁二醇酯二醇( PBA) 、六亚甲基二异氰酸酯( HDI)和阻燃剂N，N阻双（2（羟乙基）胺基亚甲基磷酸二乙酯( FCR-6）为主要原料合成阻燃聚氨酯（TPUP），将阻燃聚氨酯与锂盐复合得到阻燃聚氨酯基固态聚合物电解质。采用红外光谱、热重分析、锥形量热、力学测试、电化学窗口、电导率和电池的充放电性能测试等对阻燃聚氨酯基固态聚合物电解质进行了表征和性能测试。研究表明，TPUP具有良好阻燃性能，制备的阻燃电解质TPUP25%Li综合性能最佳，且拉伸强度达到2.09MPa，80℃时离子电导率为3.09M10-4 S/cm，以阻燃电解质组装的全固态锂电池，在80℃时0.2C电流密度下放电容量达到159mA?h/g。

Abstract:

Abstract: Flame-retardant polyurethane (TPUP) was synthesized from polyadipic acid 1,4 butanediol glycol(PBA), hexamethylene diisocyanate (HDI) and flame retardant N,N-bis(2-hydroxyethyl)aminomethylene phosphate diethyl phosphate (FCR6) as the main raw material. Flame-retardant polyurethane-based solid polymer electrolyte was prepared by mixing TPUP with LiTFSI and tested by infrared spectroscopy, thermogravimetric analysis, conical calorimetry, mechanical test, electrochemical window, ionic conductivity and charge-discharge performance test. The result showed that TPUP-based electrolyte TPUP25%Li possessed good mechanical strength (up to 2.09MPa) with a ionic conductivity of 3.09?10-4 S/cm at 80 ℃ . The discharge capacity of all-solid-state lithium battery assembled with flame retardant electrolyte reached 159mA?h/g at 0.2C at 80 ℃.