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金属储存环境对其对聚乙烯氧化物基混合电解质反应性的影响

Mehdi Costalin¹, Steeve Rousselot¹, David Lepage¹

¹Department of Chemistry, Université de Montreal, 1375 Avenue Thérèse-Lavoie-Roux, Montreal H2V 0B3, Quebec, Canada.

ACS applied materials & interfaces

|August 23, 2023

概括

暴露于大气中的气体会在金属阳极上形成被动化层,改变它们与固体聚合物电解质 (SPEs) 的反应性. 了解这些层对于改善固态金属电池性能至关重要.

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
电池技术电池技术

背景情况:

金属阳极具有很高的容量,但由于树的生长和液体电解质的不稳定性而受到影响.
固体聚合物电解质 (SPEs) 是有前途的替代品,因为它们的安全性和树突抑制特性.
在SPE环境中,表面被动化层对金属阳极 (LMA) 的影响尚不清楚.

研究的目的:

为了研究大气气体暴露对金属阳极被动化的影响.
分析这些被动化层如何影响固体聚合物电解质的反应性.
为了将被动化层特征与金属电池的电化学性能相关联.

主要方法:

金属棒被暴露在O2,CO2和N2中,形成被动化层.
X射线光电子光谱 (XPS) 描述了被动化层的组成.
拉曼光谱,电化学阻抗光谱 (EIS) 和静电线性极化 (GLP) 评估了接口反应性和性能.

主要成果:

暴露于气体显著改变了金属被动化层的化学成分.
消极化层的性质直接影响金属阳极和固体聚合物电解质之间的反应性.
SPE-被动化层的相互作用影响Li-SPE-Li电池堆的长期稳定性和电化学性能.

结论:

金属被动化层的化学组成是控制阳极-电解质相互作用的关键因素.
对被动化层进行彻底的表征对于优化固态金属电池设计和性能至关重要.
这项研究强调了控制LMA表面化学的重要性,以确保可靠的固态电池运行.

关键词:

所有固态电池都是固态电池.金属金属的使用情况消化层是一种被动化层.固体聚合物电解质的电解质固态界面的固态界面储存条件储存条件储存条件

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