A lithium superionic conductor for millimeter-thick battery electrode

作者：Yuxiang Li, Subin Song, Hanseul Kim, Kuniharu Nomoto, Hanvin Kim, Xueying Sun, Satoshi Hori, Kota Suzuki, Naoki Matsui, M. Hirayama, T. Mizoguchi, Takashi Saito, Takashi Kamiyama, R. Kanno · 发表于：Science · 年份：2023 · DOI：10.1126/science.add7138 · 被引用次数：405 · 研究领域：Medicine

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. Description Editor’s summary Solid electrolytes have been developed to allow solid-state batteries to compete with liquid electrolyte batteries, but there is still a challenge in ensuring good contact with the electrodes, which thus limits the thickness of electrodes that can be used in practice. Li et al. applied the principles of high-entropy materials to improve upon the properties of existing electrolytes through the sensible partial substitution of addition elements. The authors demonstrate the incorporation of their materials into a cathode structure, which provides the high ionic conductivity required for solid-state battery ap...