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用于固态电池的PTHF/LATP复合聚合物电解质

Elmira Nurgaziyeva¹, Gulnur Turlybay¹, Aigul Tugelbayeva¹

¹National Laboratory Astana, Nazarbayev University, Astana 010000, Kazakhstan.

|November 27, 2024

概括

使用PTHF和PEGDA的新型交联复合聚合物电解质 (CPE) 提高了固态离子电池的安全性和性能. 这种新型材料提供了更好的机械强度和离子导电性,推进了电池技术.

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:

固态离子电池 (LIB) 需要先进的电解质来克服安全性和稳定性问题.
基于聚乙烯的电解质往往具有不良的机械性能和快速降解.
复合聚合物电解质 (CPE) 通过将聚合物的灵活性与陶填充物的特性相结合,提供了一个有希望的替代品.

研究的目的:

开发和研究一种新的交联复合聚合物电解质 (CPE) 用于固态LIBs.
为了评估聚甲 (PTHF) 交联和酸 (LATP) 陶添加的协同效应.
优化CPE成分和LATP含量,以提高电化学性能和机械稳定性.

主要方法:

使用PTHF,聚乙烯甘二烯酸盐 (PEGDA),LATP颗粒和LiTFSI盐合成CPE.
薄膜组成和LATP含量的系统变化.
机械强度,电化学稳定性,离子导电性和微观结构的表征.
温度依赖的离子导电性测量.

主要成果:

含有15重%LATP (PPL15) 的CPE显示出更好的机械强度和电化学稳定性.
在80°C时,达到1.16×10−5 S·cm−1的高离子导电率,超过了基于PEO的电解质.
结合PEGDA增强了盐分离和离子运输,从而产生了统一的微观结构.
在较低的LATP度下观察到最佳性能,这表明粒子聚合的有害影响.

结论:

开发的交联CPE系统有效地解决了聚乙烯电解质的安全问题和降解问题.
PTHF交叉连接和LATP整合的协同组合导致固态LIBs的优异性能.
对优化陶填充剂分散的进一步研究对于最大限度地提高离子传输和推进固态电池技术至关重要.

关键词:

在LATPP上,你会发现.这是纳西康型的NASICON.陶颗粒是一种陶颗粒.复合聚合物电解质的电解质.离子电池是一种离子电池.

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