民生证券：全固态电池技术突破在即 产业链迎来新机遇

Group 1 - The core viewpoint is that solid-state batteries are becoming a key focus for next-generation battery technology due to their high energy density, non-flammability, and higher thermal limits compared to traditional lithium-ion batteries [1][3] - The Ministry of Industry and Information Technology (MIIT) has invested approximately 6 billion yuan to support leading companies in solid-state battery research and development, with expectations for phased commercialization in consumer, eVTOL, and power sectors from 2025 to 2030 [1][3] - Solid-state batteries are expected to achieve energy densities exceeding 500 Wh/kg, with the positive electrode material continuing to use high-nickel ternary materials, while the negative electrode will shift towards silicon-based or lithium metal electrodes [1][2] Group 2 - Solid electrolytes are categorized into four main types: polymers, oxides, sulfides, and halides, each with distinct advantages and disadvantages regarding ionic conductivity and stability [2] - The core challenges for solid-state batteries include interfacial wetting issues, electrochemical stability, and physical contact problems, which can lead to lithium dendrite growth and reduced cycle life [2] - Key advancements in solid-state battery manufacturing include dry electrode processes and the use of nickel-iron alloys for current collectors due to the corrosive nature of sulfides [2]