A lithium superionic conductor for millimeter-thick battery electrode

• 成果类型: Article
• 署名作者: Li, Yuxiang; Song, Subin; Kim, Hanseul; Nomoto, Kuniharu; Kim, Hanvin; Sun, Xueying; Hori, Satoshi; Suzuki, Kota; Matsui, Naoki; Hirayama, Masaaki; Mizoguchi, Teruyasu; Saito, Takashi; Kamiyama, Takashi; Kanno, Ryoji
• 署名单位: Institute of Science Tokyo; Tokyo Institute of Technology; Institute of Science Tokyo; Tokyo Institute of Technology; University of Tokyo; High Energy Accelerator Research Organization (KEK); Graduate University for Advanced Studies - Japan; Nissan Motor Company; Chinese Academy of Sciences; Institute of High Energy Physics, CAS; Chinese Academy of Sciences; Institute of High Energy Physics, CAS
• 刊物名称: SCIENCE
• ISSN/ISSBN: 0036-14095
• DOI: 10.1126/science.add7138
• 发表日期: 2023-07-07
• 页码: 50-53
• 关键词: solid electrolytes; ionic-conductivity; electrochemical properties; composite electrode; crystal-structures; single-crystal; li6ps5x x; argyrodite; si; STABILITY

摘要

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.