Toyota to Introduce Solid-State Batteries in 2027

Toyota has announced its intention to integrate cutting-edge solid-state batteries (SSB) into its vehicles by 2027–2028. These batteries are expected to last up to 40 years, which is four times longer than most current lithium-ion batteries used in electric cars. This information comes from Interesting Engineering.
The solid-state battery technology uses a solid electrolyte instead of a liquid one, enhancing safety, energy density, and longevity. These batteries are smaller, lighter, and charge faster, reducing the risk of overheating. Reports indicate they can deliver a range of over 1,000 km on a single charge.
In October, Toyota announced a breakthrough in solid-state battery development, collaborating with Sumitomo Metal Mining for the mass production of cathode materials. Their partnership has been ongoing since 2021 and aims to address the issue of cathode degradation during multiple charge-discharge cycles. The use of Sumitomo's proprietary powder synthesis technology has led to more durable materials. Mass production is scheduled to begin in Japan's 2028 fiscal year, initially for Toyota, followed by a broader market.
Thanks to the long lifespan, these batteries can be reused in two or three vehicles. While lithium-ion batteries retain about 90% of their capacity for approximately 10 years, solid-state batteries can last up to 40 years. This significantly reduces the carbon footprint of production, as one solid-state battery replaces four conventional ones.
Toyota is also collaborating with Idemitsu Kosan, which is building a factory to produce lithium-sulfide, a key material for the new batteries. The factory will have a capacity of 1,000 tons per year, with mass production set to launch in 2027.
At the Japan Mobility Show, Toyota representatives noted that the technology will be expensive initially, and cost reduction will depend on manufacturing processes and demand. It is expected that the first solid-state batteries will appear in premium models such as Lexus or Century, and later in mass-market vehicles, including the new generation Toyota Corolla.
Experts indicate that widespread adoption of solid-state batteries will take time due to production complexity, high costs, and material shortages. However, Toyota's recent steps suggest significant progress towards commercializing this technology.