固态电池，我国科学家取得重要研究进展

Core Viewpoint - A research team led by Professor Zhang Qiang from Tsinghua University has made significant advancements in solid-state battery polymer electrolytes, developing a novel fluorinated polyether electrolyte that enhances physical contact and ionic conductivity at solid-solid interfaces, providing new insights and technical support for high safety and high energy density solid-state lithium batteries [1][2]. Group 1: Research Progress - The team successfully developed a new fluorinated polyether electrolyte using thermally initiated in-situ polymerization technology, which significantly improves the physical contact and ionic conductivity at solid-solid interfaces [1]. - The research paper titled "Tailoring polymer electrolyte solvation for 600 Wh kg−1 lithium batteries" was published online in Nature on September 24 [1]. Group 2: Challenges Addressed - Solid-state batteries face two main challenges: poor interface contact due to rigid solid-solid materials and the electrolyte's compatibility with high voltage cathodes and highly reducing anodes under extreme chemical environments [1]. - The team proposed a new strategy of "anion-rich solvation structure" design to address these challenges [1]. Group 3: Performance and Safety - The polymer battery assembled with the new electrolyte demonstrated excellent electrochemical performance, achieving an energy density of 604 Wh/kg under 1 MPa external pressure, surpassing current commercial batteries [2]. - The battery successfully passed safety tests, including needle penetration and exposure to a 120°C heat chamber for 6 hours, without any incidents of combustion or explosion, showcasing its superior safety performance [4].