续航与安全不可兼得？固态电池两大界面难题被清华团队打破

Core Insights - Tsinghua University's research team has developed a new fluorinated polyether electrolyte that achieves an energy density of 604 Wh kg⁻¹, significantly higher than the typical range of 150-320 Wh kg⁻¹ for current batteries [1][9] - The research addresses the critical challenges of solid-state batteries, particularly the interface issues that hinder performance and safety [3][4] Group 1: Research Breakthrough - The new electrolyte design utilizes a "rich anion solvation structure" strategy, enhancing the physical contact and ionic conductivity at the solid-solid interface [5][7] - The electrolyte can withstand high voltage up to 4.7 V, allowing compatibility with high-voltage lithium-rich manganese-based cathodes and lithium metal anodes [5][7] Group 2: Performance Metrics - The developed polymer battery exhibits a first-cycle coulombic efficiency of 91.8% and a specific capacity of 290.3 mAh g⁻¹, maintaining a capacity retention of 72.1% after 500 cycles at a 0.5 C rate [7][9] - The battery successfully passed safety tests, including puncture and thermal stability tests at 120°C, without any combustion or explosion [9] Group 3: Industry Implications - This research provides a new approach and technical support for the development of practical high-safety, high-energy-density solid-state lithium batteries, which are crucial for advanced applications in electric vehicles and other high-energy-demand sectors [1][9] - The findings could potentially lead to a shift in the battery industry, moving towards safer and more efficient energy storage solutions [1][3]