Japanese oil giant, Idemitsu Kosan, is building a new large-scale lithium sulfide plant that will supply the raw material for Toyota’s upcoming all-solid-state EV batteries.
New plant will supply Toyota’s all-solid-state EV batteries
Toyota has been promising to launch all-solid-state EV batteries for years, but those plans may finally be coming together.
Idemitsu announced on Thursday it will build a large-scale production plant for lithium sulfide, a raw material used in all-solid-state EV batteries.
All-solid-state batteries, often called the “holy grail” of EV battery tech, promise to deliver drastic improvements in driving range, charging speeds, and energy density. As the name implies, they feature a solid electrolyte rather than traditional lithium-ion batteries, which contain a liquid electrolyte.
Japan’s Ministry of Economy, Trade, and Industry (METI) has already approved the planned construction site. It will cost around 21.3 billion yen ($142 million) and was deemed as a “plan for ensuring supply of storage batteries.”
Idemitsu aims to mass produce all-solid state batteries in 2027 and 2028. The plant will be able to produce 1,000 metric tons of lithium sulphide annually.
The company’s executive officer Tetsuji Mishina told the media (via Reuters) at its oil refinery in China, where it will build the new facility.
Mishina also said Toyota would be its first customer before it plans to expand to others later. Toyota and Idemitsu have been working together since 2023 to develop solid electrolytes for the mass production of all-solid-state EV batteries.
The new plant is another step in the right direction, part of Idemitsu and Toyota’s plans to commercialize all-solid-state EV batteries in 2027 to 2028.
In September, Toyota was granted a METI certification, which gave it the green light to build the new batteries in Japan.
The approval comes as Japan looks to wean itself off dependence on China or South Korea for batteries and establish a stable local supply chain. Toyota and Idemitsu are among several leading Japanese companies investing a combined $7 billion (1 trillion yen) in domestic battery production.
Electrek’s Take
Will Toyota actually launch EVs powered by all-solid-state batteries? They have been touting the new battery tech for years, but it seems to have made some progress recently.
Meanwhile, others are already getting a head start. Mercedes-Benz began testing the “world’s first” production EV powered by solid-state batteries earlier this month.
Through its partnership with US-based Factorial Energy and Mercedes AMG High-Performance Powertrains (HPP), the company tested a slightly modified EQS with over 621 miles of driving range. Mercedes said it was “the first car powered by a lithium-metal solid-state battery on the road.”
Factorial is working with other major OEMs, including Stellantis. Next year, Stellantis plans to launch a series of electric Dodge Chargers powered by Factorials solid-state batteries.
Honda, Hyundai, and let’s not forget global battery leaders CATL and BYD, are also racing to launch the promising new battery tech.
FTC: We use income earning auto affiliate links. More.
Comments