Jang, Jinha Wang, Chongzhen Kang, Gumin Han, Cheolhee Han, Jaekyeong Shin, Jae-Sun Ko, Sunghyun Kim, Gihwan Baek, Jaewon Kim, Hee-Tak Lee, Hochun Park, Chan Beum Seo, Dong-Hwa Li, Yuzhang Kang, Jiheong 2025-03-23T12:30:24Z 2025-03-23T12:30:24Z 2025-03-20 2025-04 2058-7546 https://pubs.kist.re.kr/handle/201004/152094 Developing high-safety Li-metal batteries (LMBs) with rapid rechargeability represents a crucial avenue for the widespread adoption of electrochemical energy storage devices. Realization of LMBs requires an electrolyte that combines non-flammability with high electrochemical stability. Although current electrolyte technologies have enhanced LMB cyclability, rational electrolyte fabrication capable of simultaneously addressing high-rate performance and safety remains a grand challenge. Here we report an electrolyte design concept to enable practical, safe and fast-cycling LMBs. We created miniature anion-Li+ solvation structures by introducing symmetric organic salts into various electrolyte solvents. These structures exhibit a high ionic conductivity, low desolvation barrier and interface stabilization. Our electrolyte design enables stable, fast cycling of practical LMBs with high stability (LiNi0.8Co0.1Mn0.1O2 cell (twice-excessed Li): 400 cycles) and high power density (pouch cell: 639.5 W kg-1). Furthermore, the Li-metal pouch cell survived nail penetration, revealing its high safety. Our electrolyte design offers a viable approach for safe, fast-cycling LMBs. English NATURE PUBLISHING GROUP Miniature Li+ solvation by symmetric molecular design for practical and safe Li-metal batteries Article 10.1038/s41560-025-01733-9 1 Nature Energy, v.10, no.4, pp.502 - 512 Nature Energy 10 4 502 512 N scie scopus 001438322000001 2-s2.0-86000325976 Energy & Fuels Materials Science, Multidisciplinary Energy & Fuels Materials Science Article SOLID-STATE ELECTROLYTES LITHIUM INTERPHASE