Toyota has announced its plans to integrate cutting-edge solid-state batteries (SSB) into its vehicles by 2027–2028. These innovative batteries are reported to last up to 40 years, four times longer than conventional lithium-ion batteries used in electric vehicles. This information comes from Interesting Engineering.
The solid-state battery technology utilizes a solid electrolyte instead of a liquid one, enhancing safety, energy density, and lifespan. They are smaller, lighter, and charge faster, reducing the risk of overheating. It is noted that these batteries can provide a range of over 1,000 km on a single charge.
In October, Toyota announced a breakthrough in solid-state battery development through its collaboration with Sumitomo Metal Mining for the mass production of cathode materials. This partnership, active since 2021, aims to tackle the degradation issues of the cathode during multiple charging and discharging cycles. Utilizing Sumitomo's proprietary powder synthesis technology has resulted in the creation of a more durable material. Mass production is scheduled to begin in the 2028 fiscal year in Japan, initially for Toyota, and later for a broader market.
Thanks to their long lifespan, the batteries can be reused in two or three vehicles. While lithium-ion batteries retain about 90% of their capacity for around 10 years, solid-state batteries can last up to 40 years, thus reducing the carbon footprint of production, as one solid-state battery replaces four conventional ones.
Toyota is also collaborating with Idemitsu Kosan, which is establishing a plant for producing lithium-sulfur, a key material for the new batteries. The plant is expected to have a capacity of 1,000 tons per year, with mass production slated for 2027.
At the Japan Mobility Show, Toyota representatives indicated that the technology will be expensive in the initial stages, and cost reductions will depend on manufacturing processes and demand. The first solid-state batteries are anticipated to appear in premium models such as Lexus or Century, followed by mass-market vehicles, including the new generation of the Toyota Corolla.
Experts highlight that the widespread adoption of solid-state batteries will take time due to production complexities, high costs, and limited raw materials. However, Toyota's recent advancements indicate significant progress towards the commercialization of this technology.