On the other hand, the biggest challenge is durability.Ī longstanding technical issue has been that repeatedly charging and discharging the battery causes cracks between the cathodes and anodes and the solid electrolytes, degrading battery performance. In addition, as solid-state batteries are smaller and more powerful, they will enable battery EVs to meet a diverse range of needs, from sports cars, which require high-power performance, to commercial vehicles, which require frequent quick recharging. Solid-state batteries are also characterized by being highly stable because they are resistant to changes in temperature and can robustly endure high temperatures and high voltages. This allows ions, which convey electricity, to move faster, thus enabling shorter charging times, increased cruising ranges, and higher power output. To reemphasize our company's stance, battery EVs are an important option in Toyota's multi-pathway strategy.įor the next-generation batteries that will support the evolution of battery EVs, we are developing optimal solutions in line with specific applications and characteristics, including high-output and long-range batteries, as well as high-quality and affordable versions for widespread use.Īnd, looking ahead to the future of battery technology, we are developing solid-state batteries as an option beyond liquid batteries.Īn advantage of solid-state batteries is that the electrolyte is solid. Please let me explain the background behind this collaboration. We will then lay the foundation for mass production. Specifically, our two companies will combine their separate efforts to mass-produce new materials and establish a supply chain for solid electrolytes, which hold the key to the commercialization of solid-state batteries.įirst, between 20, we will start to produce solid-state batteries for use in battery electric vehicles. Idemitsu Kosan and Toyota Motor Corporation have agreed to collaborate on the mass production of solid-state batteries. Thank you very much for coming today despite your busy schedules and the short notice. I am Koji Sato of Toyota Motor Corporation. Presentation Koji Sato, President and CEO, Toyota Motor Corporation Both companies, working together across industries, will contribute to global carbon neutrality, and will lead the future with technologies created in Japan. Through combination of both companies' material development technologies, Idemitsu's material manufacture technologies and Toyota's battery processing and assembly technologies which is obtained through BEV development, both companies will aim to realize mass production of both solid electrolytes and all-solid-state batteries suitable for global widespread use. Further, the company is steadily increasing the capacity of its small pilot facility― announced in June 2023―and is proceeding construction plan of a large pilot facility― announced in April 2022―, which will contribute to commercialization of all-solid-state batteries in 2027-28. And through such development, it has been working on development of mass production technology on sulfide solid electrolytes, aiming to establish a stable supply system. Idemitsu has also been developing production technologies of lithium sulfide which is an intermediate material for solid electrolytes, using by-products which are generated in the course of petroleum refining. Based on the results of Phase 2, both companies will study of future full-scale mass production and commercialization.Study of future full-scale mass production Toyota will promote development of both all-solid-state batteries which sulfide solid electrolytes are used and BEV development in which the batteries are incorporated, and then will ensure market launch of BEVs with all-solid-state batteries in 2027-28.Through construction and startup of a large pilot facility, Idemitsu will promote sulfide solid electrolyte manufacture, and then will obtain mass production technology.Mass production using a large pilot facility
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