固态电池新突破，清华团队解决两大难题，安全与续航兼具，商业化何时到来？

Core Viewpoint - The research team from Tsinghua University has made significant advancements in solid-state battery technology, specifically in developing a new fluorinated polyether electrolyte that addresses key challenges in achieving high safety and energy density in solid-state lithium batteries [1][2][3]. Group 1: Solid-State Battery Technology - Solid-state batteries primarily have four technical routes: sulfides, oxides, polymers, and halides, with sulfides currently being the mainstream choice [1][5]. - The Tsinghua team focuses on polymer electrolytes, which are considered the most mature among the four routes, having been developed over many years [7][10]. - The main challenges for solid-state batteries include ionic conductivity and the solid-solid interface, which are critical for battery performance [1][2][10]. Group 2: Challenges and Solutions - The Tsinghua team's new electrolyte addresses both ionic conductivity and solid-solid interface issues, which are significant barriers to commercializing solid-state batteries [2][3]. - The solid-solid interface problem arises when there are gaps between the solid electrolyte and the electrodes, hindering lithium ion movement [2][6]. - The team utilized in-situ polymerization technology to allow the polymer to grow and fill any gaps that may form at the solid-solid interface [2][3]. Group 3: Market Dynamics and Commercialization - Currently, about 37% of global solid-state battery R&D is focused on sulfide technology, particularly among Japanese and Korean companies [5]. - The high cost of sulfide solid electrolytes, which can reach 3 million to 4 million yuan per ton, poses a significant barrier to widespread adoption [6][7]. - The commercialization of solid-state batteries is still in its early stages, with expectations for significant developments by 2027 [10][11]. Group 4: Future Prospects - If the Tsinghua team's polymer electrolyte can overcome the low ionic conductivity issue, it may replace sulfide and oxide solid electrolytes, leading to a new direction in solid-state battery technology [10][11]. - The potential for polymer electrolytes to provide better solid-solid interface contact, simpler manufacturing processes, and lower costs makes them a promising alternative [10].