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A lithium superionic conductor for millimeter-thick battery electrode

2023/07/06 by Yuxiang Li, S. N. Song, Subin Song +14 · 30 citations
Engineering · Materials Science · #Advanced Battery Materials and Technologies #Advancements in Battery Materials #Thermal Expansion and Ionic Conductivity

paper · doi:10.1126/science.add7138

Abstract

No design rules have yet been established for producing solid electrolytes with a lithium-ion conductivity high enough to replace liquid electrolytes and expand the performance and battery configuration limits of current lithium ion batteries. Taking advantage of the properties of high-entropy materials, we have designed a highly ion-conductive solid electrolyte by increasing the compositional complexity of a known lithium superionic conductor to eliminate ion migration barriers while maintaining the structural framework for superionic conduction. The synthesized phase with a compositional complexity showed an improved ion conductivity. We showed that the highly conductive solid electrolyte enables charge and discharge of a thick lithium-ion battery cathode at room temperature and thus has potential to change conventional battery configurations.

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