材料汇·2025-11-12 15:48Core Viewpoint - Solid-state batteries exhibit superior performance and have a wide range of applications, with accelerated industrialization processes both domestically and internationally [5]. Group 1: Advantages of Solid-State Batteries - Solid-state batteries have higher energy density and better safety compared to liquid batteries, with energy density expected to reach over 500 Wh/kg [15][11]. - They can operate under extreme conditions without the risk of combustion or explosion due to the use of non-volatile solid electrolytes [15]. - The design of battery cells, modules, and systems is simplified due to the non-flowing nature of solid electrolytes, optimizing the PACK design [15]. Group 2: Solid Electrolyte Technologies - Solid electrolytes are the core component of solid-state batteries, with various technology routes including polymers, oxides, sulfides, and halides, with sulfides being the most widely accepted due to their high ionic conductivity [16][14]. - Each type of solid electrolyte has its advantages and disadvantages, with sulfides offering excellent processing advantages and flexibility [16]. Group 3: Production Challenges - The mass production of solid-state batteries faces challenges such as the interface contact between solid electrolytes and electrodes, as well as the engineering issues related to cost reduction [19][22]. - Key challenges include ensuring the stability of the solid-solid interface and the large-scale preparation of sulfide solid electrolytes, which significantly impact the commercial viability of solid-state batteries [22][19]. Group 4: Domestic and International Industry Landscape - Major domestic battery manufacturers have clarified their technology routes, focusing on sulfide electrolytes and aiming for small-scale production by 2027, with energy density targets around 400 Wh/kg [26][23]. - Internationally, companies in the US and Japan are advancing rapidly, with many planning to achieve large-scale production of solid-state batteries by 2030 [27][25]. - Policies in China are accelerating the development of solid-state batteries, with significant support from government agencies aimed at achieving commercial applications by 2026 [29][31].