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非易燃的无溶剂液态聚合物电解质用于金属电池

Guo-Rui Zhu¹, Qin Zhang¹, Qing-Song Liu¹

¹The Collaborative Innovation Center for Eco-Friendly and Fire-Safety Polymeric Materials (MoE), National Engineering Laboratory of Eco-Friendly Polymeric Materials (Sichuan), State Key Laboratory of Polymer Materials Engineering, College of Chemistry, Sichuan University, Chengdu, 610064, China.

Nature communications

|August 1, 2023

概括

一种新的无挥发性有机溶剂的液态聚合物电解质,为金属电池提供了安全和高性能的替代品. 这种不易燃电解质表现出极好的离子导电性和稳定性,为更安全的电池技术铺平了道路.

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
聚合物科学聚合物科学

背景情况:

固体聚合物电解质对高能金属电池具有前景,但在接口性能和离子导电性方面面临挑战.
目前的策略经常使用有机溶剂,损害安全,这与安全电池设计的目标相矛盾.

研究的目的:

提出一种新的液态聚合物电解质 (LPE) 概念,可以消除小分子溶剂,以制造更安全,高性能的电池.
为了研究类似刷子的聚合物基LPE作为盐的唯一溶剂的特性和性能.

主要方法:

室温液态刷状聚合物的设计和合成.
描述LPE的离子导电性,不易燃性和树抑制能力.
在袋式电池中评估长期循环稳定性和滥用耐受性 (热,真空,机械).

主要成果:

开发的LPE是不易燃的,具有高离子导电性 (1.09 × 10−4 S cm−1在25°C).
观察到显著抑制了树的生长.
在广泛的温度范围内 (≥1000个60°C和90°C的周期) 实现了长期稳定的循环性能.
囊细胞表现出对热,真空和机械滥用的抵抗力.

结论:

拟议的液态聚合物电解质为金属电池中的传统电解质提供了安全和高性能的替代品.
这种无溶剂的设计策略为开发先进的聚合物电解质提供了新的方向,用于更安全的能量存储解决方案.

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