Development of liquid zwitterion-type lithium ion conductive polymers with controlled nano-structure

为了开发具有高离子导电性的新型锂离子导电聚合物，合成了由低聚醚单体和两性离子单体组成的共聚物。此外，还对液体两性离子/锂盐复合材料的性能进行了评价，并研究了其锂离子导电性。两性离子部分是一种高极性基质，可以将大量的锂盐解离成离子物种。液体两性离子的电化学窗口约为5V，足以作为锂离子电池的电解液。对聚醚/液体两性离子/锂盐复合材料制备的锂离子电池进行了充放电测试，性能稳定。

In order to develop novel lithium ion conductive polymers with high ion conductivity, copolymers composed of an oligoether monomer and a zwitterionic monomer were synthesized. In addition, the properties of liquid zwitteion/lithium salt composites were evaluated, and their lithium ion conductivity was investigated. The zwitterion moiety is a high polarity matrix that can dissociate a large amount of lithium salts into ion species. The electrochemical window of liquid zwitterion was about 5 V, which was enough value to be electrolytes for lithium ion batteries. Charge/discharge tests were conducted for the lithium ion batteries that were fabricated with polyether/liquid-zwitterion/lithium-salt composites, and a stable performance was observed.