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剪切加厚,星形聚合物电解质用于离子电池

Magdalena Słojewska¹, Arkadiusz Czerwiński¹, Marcin Kaczorowski¹

¹Faculty of Chemistry, Warsaw University of Technology, Noakowskiego 3, 00-664 Warsaw, Poland.

Molecules (Basel, Switzerland)

|August 29, 2024

概括

这项研究引入了一种新型的聚合物剪切加厚电解质,消除了离子电池中的易燃溶剂. 这项创新通过防止冲击期间出现短路,提高了安全性.

科学领域:

材料科学材料科学材料科学
电化学电化学电化学
聚合物化学聚合物化学

背景情况:

由于易燃的电解质,离子电池存在安全风险,导致内部短路引发点火或爆炸.
目前的电池技术需要更安全的替代方案,以减轻与热失控和物理损坏相关的风险.

研究的目的:

开发一种新的聚合物剪切加厚电解质 (PSTE),以提高离子电池的安全性.
为了创建一种不易燃电解质,防止在撞击时内部短路.

主要方法:

使用星形寡合物 (带有聚链的三甲基芯) 和20%重量%的纳米二氧化合成了一个PSTE.
描述了电解质的离子导电性,离子转移数和剪切加厚行为.
评估了电解质在冲击模拟期间防止电极短路的性能.

主要成果:

在PSTE证明的离子导电性为10−6 S cm−1在20°C和10−4 S cm−1在80°C.
获得了高的Li+转移数 (t+ = 0.79).
在2s-1的临界剪速下,粘度增加了近30倍,达到1187Pa s,有效防止短路.

结论:

开发的聚合物剪切加厚电解质通过消除易燃溶剂,为提高离子电池安全提供了有前途的解决方案.
电解质的剪切加厚特性有效地减轻内部短路的风险,提高电池的整体稳定性和安全性.
这项技术在为各种应用开发更安全的储能解决方案方面取得了重大进展.

关键词:

抗冲击电池是耐冲击的电池.离子电池是一种离子电池.聚合物电解质的聚合物电解质.安全的离子电池安全的离子电池剪切加厚电解质的电解质.

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