Preparation and Properties of DOPO-KH560 Modified Polyethylene Oxide Polymer Solid State Electrolytes

被引：0
|
作者：
Lu J. [1 ]
Jia L. [1 ]
Liu X. [1 ]
Zhang C. [1 ]
机构：
[1] Polymer Research Institute, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu
来源：
Gaofenzi Cailiao Kexue Yu Gongcheng/Polymeric Materials Science and Engineering | 2021年 / 37卷 / 03期
关键词：
Ionic conductivity; Lithium-ion batteries; Polymer solid electrolyte; Thermal stability;
D O I：
10.16865/j.cnki.1000-7555.2021.0054
中图分类号：
学科分类号：
摘要：
An excellent silicon/phosphorus double-effect flame retardant, prepared by modifying 3-glycidoxy-propyltrimethoxysilane (KH560) with 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO), was compounded with polyethylene oxide (PEO) and lithium salts to prepare polymer solid electrolytes, and its influence on the thermal stability and electrochemical performance of PEO based electrolytes was studied. It is found that the conductivity of the DOPO-KH560/PEO/LiTFSI electrolyte is as high as 1.8×10-4 S/cm when the addition amount of DOPO-KH560 is 10% and n(EO):n(Li+) =8:1 and it can maintain the electrochemical stability below 4.9 V. The LiFePO4/Li half battery prepared with the electrolyte can be used stably at 80 ℃, and deliver a reversible specific capacity of 136.5 mA•h/g at 0.2 C after 80 cycles, showing an excellent cycle stability. © 2021, Editorial Board of Polymer Materials Science & Engineering. All right reserved.
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页码：135 / 142and150
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