灵活的高离子导电型基于PEO的固体聚合物电解质与液体可塑剂,用于高性能固态电池
Ayaka Abe1, Daisuke Mori1, Zhichao Wang1
1Graduate School of Engineering, Mie University, Tsu, Mie, 514-8507, Japan.
ChemistryOpen
|April 15, 2024
概括
研究人员开发了一种更安全,更灵活的聚合物电解质,用于电动汽车. 这种先进的材料具有高导电性,并防止树状石的形成,解决了当前电池技术的关键局限性.
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
- 聚合物科学 聚合物科学
背景情况:
- 离子电池 (LIB) 对电动汽车 (EV) 至关重要,但由于易燃的有机电解质,它们存在安全风险.
- 全固态电池提供了更安全的替代方案,聚合物电解质由于其灵活性而特别有吸引力.
- 传统的聚合物电解质存在低室温离子导电性,这阻碍了实际应用.
研究的目的:
- 开发一种灵活的,以PEO为基础的复合聚合物电解质,具有高离子导电性.
- 为了解决与LIB中的易燃电解质相关的安全问题.
- 为了实现无树的运行,以提高电池的安全性和性能.
主要方法:
- 以聚乙烯氧化物 (PEO) 为基础合成了一种复合聚合物电解质.
- 作为一种无机填充剂,加入了Li6.4La3Zr1.4Ta0.6O12 (LLTO).
- 使用四乙烯甘醇二甲基乙醇和1,2-二甲基乙作为液体增塑剂.
主要成果:
- 开发的复合电解质在25°C时表现出6.01×10−4 S/cm的高电导率.
- 这种材料具有灵活性,这是实用电池设计的关键要求.
- 复合电解质有效抑制了树的形成,提高了安全性.
结论:
- 基于PEO的新型复合电解质为更安全和高性能LIB提供了一个有前途的解决方案.
- LLTO填充剂和特定可塑剂的组合显著提高了离子导电性,并抑制了树突的生长.
- 这种灵活的电解质技术可以加速采用更安全的电动汽车.
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