固态电池关键材料保持低温原因揭示 有助研发更安全、更高能电池

Core Insights - LLZTO (Lithium Lanthanum Zirconium Oxide) is identified as a key material for solid-state batteries, maintaining exceptionally low temperatures during operation, which positions it as an ideal candidate for next-generation rechargeable batteries [1][2] - A recent study from the University of California, Riverside, reveals the reason behind LLZTO's low thermal conductivity, which is crucial for developing safer and higher energy density lithium batteries [1] Group 1: Material Properties - LLZTO is a ceramic material that serves as a solid electrolyte, offering higher energy density while significantly reducing the risks of overheating and fire [1] - The thermal conductivity of LLZTO is measured at only 1.59 watts per meter per Kelvin, approximately 1/250th that of copper, indicating that low thermal conductivity is an inherent property of the material [1] Group 2: Research Findings - The research utilized the floating zone method to grow LLZTO single crystals, which reflect the intrinsic properties of the material [1] - The study found that the presence of numerous optical phonon modes in LLZTO leads to interactions that scatter the primary heat-carrying acoustic phonons, thereby impeding thermal conduction [2] Group 3: Implications for Battery Safety - Understanding how LLZTO naturally hinders heat flow is vital for managing internal temperature changes in solid-state batteries and preventing safety risks [2] - This discovery offers new insights for atomic-level thermal regulation, aiding in predicting internal temperature distribution and improving thermal management for safer and higher-performance batteries [2]