交联复合体固体聚合物电解质添加6.4La3Zr1.4Ta0.6O12用于高压金属电池
Lamartine Meda1, Kutemwa Masafwa1, Ayssia N Crockem1
1Department of Chemistry, Xavier University of Louisiana, 1 Drexel Drive, New Orleans, Louisiana 70125, United States.
ACS applied materials & interfaces
|August 19, 2024
概括
这项研究开发了一种稳定的复合固体聚合物电解质 (CSPE) 与添加的,,氧化 (LLZTO),用于高压固态电池. CSPE-10LLZTO表现出卓越的界面稳定性和离子导电性,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:
- 复合固体聚合物电解质 (CSPE) 为固态电池提供了比液体电解质更高的安全性.
- 电极和CSPE之间的接口不稳定性阻碍了高压固态电池的性能.
- 添加的,,氧化 (LLZTO) 作为陶添加剂来改善CSPE的性能.
研究的目的:
- 为了合成和描述一种新的交叉链接的CSPE,将LLZTO纳入用于高压固态金属电池.
- 调查变化的LLZTO含量对CSPE的界面稳定性,离子导电性和电化学性能的影响.
- 评估开发的CSPE作为完整固态电池中稳定的电解质和分离器的潜力.
主要方法:
- 使用聚烯碳酸盐,聚乙烯甘甲基乙烯烯酸乙烯和聚乙烯甘二烯酸乙烯酸乙烯酸合成交叉链接的CSPE.
- 将LLZTO的不同质量分数 (10%,20%,40%) 纳入CSPE矩阵.
- 使用对称电池进行电化学表征,用于涂/剥离,离子导电量测量和制造完整的固态电池.
主要成果:
- 10% LLZTO (CSPE-10LLZTO) 的CSPE显示出与金属阳极的最稳定的接口.
- CSPE-10LLZTO表现出高灵活性,在800小时的循环过程中没有降解,并且在40°C时的离子导电率为6.4 × 10-4 S/cm.
- 使用CSPE-10LLZTO的全固态电池提供了大约140 mAh/g的容量.
- 不同扫描热度计和拉曼光谱证实了高可混合性和结构均性.
结论:
- 开发的CSPE-10LLZTO显着有望实现稳定和高性能固态金属电池.
- 添加LLZTO有效地减轻了接口不稳定性,这是基于CSPE的电池的一个关键挑战.
- 这项研究有助于推进更安全,更高效的储能解决方案.
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