高性能阻燃PEO固态聚合物电解质的制备与性能  

Preparation and Properties of High Performance Flame Retardant PEO Solid Polymer Electrolyte

作　　者：陈佳[1] 荣莉[1] 周瑞雪[1] 邹立勇[1] 刘学清[1] CHEN Jia;RONG Li;ZHOU Ruixue;ZOU Liyong;LIU Xueqing(Key Laboratory of Optoelectronic Chemical Materials and Devices of Ministry of Education,School of Optoelectronic Materials&Technology,Jianghan University,Wuhan 430056,China)

机构地区：[1]江汉大学光电化学材料与器件教育部重点实验室,光电材料与技术学院,湖北武汉430056

出　　处：《塑料工业》2023年第6期104-109,共6页China Plastics Industry

基　　金：国家重点研发计划项目(2016YFB0401505)。

摘　　要：易燃以及离子电导率低等固有缺陷限制了聚环氧乙烷(PEO)在锂电池中的发展。采用甲基丙酸乙二醇酯膦酸丁二醇酯(EMPBP)以及纳米二氧化硅制备的阻燃PEO膜的极限氧指数(LOI)为30.6%,垂直燃烧测试达到UL94 V-0级别,显示出良好的P-Si协同阻燃效果。当双三氟甲烷磺酰亚胺锂(LiTFSI)质量分数达到20%时,FR-SPE4电解质膜在60℃下的离子电导率可达2.82×10^(-4)S/cm,并且具有4.82 V的宽电化学窗口。此外,FR-SPE4电解质与磷酸铁锂正极和锂负极组成的电池在50℃下循环100次后的容量保持率为91.7%,且该电池能够维持商用发光二极管(LED)的正常发光。The inherent defects of flammability and low ionic conductivity impeded the development of polyethylene oxide(PEO)in lithium batteries.The limiting oxygen index(LOI)of flame retardant PEO membrane(FR-PEO)prepared with ethylene glycol methyl propionate butyl-phosphonate(EMPBP)and nano silica is 30.6%,and the vertical burning test could pass UL94 V-0 rating,reveals benign synergistic flame retardancy of P-Si.When the mass fraction of lithium trifluoromethanesulfonylimide(LiTFSI)reaches 20%,the ionic conductivity of FR-SPE4 electrolyte membrane at 60℃could achieve 2.82×10^(-4) S/cm,along with a wide electrochemical window of 4.82 V.In addition,the cell fabricated by LiFePO 4(cathode),FR-SPE4 and Li(anode)possesses a high capacity retention of 91.7%after 100 cycles at 50℃,meanwhile,the cell can sustain commercial light-emitting diode(LED)light source to glow normally.

关 键 词：聚环氧乙烷 阻燃 固态聚合物电解质 锂电池 性能 

分 类 号：TQ314.24[化学工程—高聚物工业]