Core Insights - A research team led by Professor Zhang Qiang from Tsinghua University has made significant advancements in polymer electrolytes for lithium batteries, providing new strategies and technical support for the development of practical high-safety, high-energy-density solid-state lithium batteries [1][2] Group 1: Research Findings - The current challenges in solid-state batteries include poor interface contact due to rigid solid-solid materials and the difficulty of electrolytes to withstand extreme chemical environments with high voltage cathodes and strong reducing anodes [1] - The team proposed a new strategy called "anion-rich solvent structure design," successfully developing a novel fluorinated polyether electrolyte that enhances physical contact and ionic conductivity at solid-state interfaces [1] - The polymer battery assembled with this electrolyte demonstrated excellent electrochemical performance, achieving an energy density of 604Wh/kg under 1MPa external pressure, significantly surpassing current commercial batteries [1] Group 2: Safety and Future Implications - The battery successfully passed safety tests, including puncture and exposure to a 120°C heat chamber for 6 hours without combustion or explosion, showcasing its superior safety performance [2] - The research outcomes are expected to provide important technical references for the development of mature solid-state battery products in the future [2]

Core Insights - A new type of fluorinated polyether electrolyte has been developed by a team led by Professor Zhang Qiang from Tsinghua University, providing new ideas and technical support for the development of practical high-safety, high-energy-density solid-state lithium batteries [1][2] - Solid-state batteries are considered a significant development direction for the next generation of secondary lithium batteries, particularly those using lithium-rich manganese layered oxide as cathode materials, which show the potential to exceed an energy density of 600Wh/kg [1] Group 1 - The current challenges in solid-state batteries include poor interface contact due to rigid solid-solid material interactions and the difficulty of electrolytes to coexist in extreme chemical environments with high-voltage cathodes and strong reducing anodes [1] - The team proposed a new strategy of "rich anion solvation structure" design, successfully developing a novel fluorinated polyether electrolyte that enhances physical contact and ionic conductivity at the solid-solid interface, significantly improving the high-pressure performance and interface stability of lithium batteries [1] Group 2 - A polymer soft-pack full battery constructed with this electrolyte achieved an energy density of 604Wh/kg under an external pressure of 1MPa, surpassing current commercial batteries [2] - The battery successfully passed safety tests, including puncture and exposure to a 120°C thermal chamber for 6 hours without combustion or explosion, demonstrating excellent safety performance [2] - This research outcome is expected to provide important technical references for the development of mature solid-state battery products in the future [2]

Core Viewpoint - A research team led by Professor Zhang Qiang from Tsinghua University has made significant advancements in solid-state battery polymer electrolyte research, 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 - The new fluorinated polyether electrolyte was developed using a thermal initiation in-situ polymerization technique, which effectively improves the physical contact and ionic conductivity at the solid-state interface [1]. - The research addresses two major challenges in solid-state batteries: poor interface contact due to rigid solid-solid materials and the electrolyte's compatibility with high voltage cathodes and highly reducing anodes in extreme chemical environments [1]. - The research findings were published in the journal Nature under the title "Tailoring polymer electrolyte solvation for 600 Wh kg1 lithium batteries" on September 24 [1]. Group 2 - 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, significantly surpassing current commercial batteries [2]. - The battery successfully passed safety tests, including puncture and exposure to a 120°C heat chamber for six hours without any incidents of combustion or explosion, showcasing its superior safety performance [2]. - The research outcomes are expected to provide important technical references for the development of mature solid-state battery products in the future [2].