Saturday, December 2, 2023
News Toyota and Idemitsu Collaborate on 621-Mile Solid-State Battery Development for 2027-2028

Toyota and Idemitsu Collaborate on 621-Mile Solid-State Battery Development for 2027-2028

Toyota partners with Idemitsu Kosan to advance all-solid-state battery technology, aiming for mass production by 2027-2028.


  • All-solid-state batteries offer more energy density, faster charging, and enhanced safety compared to current lithium-ion batteries.

  • The collaboration aims to develop mass-production techniques for solid electrolytes and establish a comprehensive supply chain.

  • Toyota’s goal is to use these batteries to help sell 3.5 million EVs globally by 2030, with two versions of the battery planned.


Toyota Motor Corp. has announced a significant partnership with the Japanese petrochemical titan, Idemitsu Kosan, targeting the commercialization of advanced all-solid-state battery technology between 2027 and 2028. This collaboration intends to pave the way for large-scale mass production of these batteries, which are viewed as pivotal in the evolution of electric vehicles (EVs).

2023 Toyota bZ4X | Photo: Matt St-Pierre

All-solid-state batteries differ from traditional liquid-electrolyte lithium-ion batteries. They use a ceramic-like electrolyte, leading to numerous advantages: they possess greater energy density, can charge more rapidly, and are generally seen as safer. Such batteries are particularly advantageous for larger vehicles such as SUVs, but also offer strong benefits for sports cars.

2023 Toyota bZ4X | Photo: Matt St-Pierre

This battery development aligns with Toyota’s ambitious goal of selling 3.5 million EVs worldwide by 2030, under both the Toyota and Lexus brands. The company has plans to release two versions of the all-solid-state battery. The first, projected for the 2027-2028 period, aims for a range exceeding 621 miles and is expected to charge from 10% to 80% in roughly 10 minutes. The second version, which will be introduced at a later unspecified date, is anticipated to offer a range surpassing 745 miles.

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Both companies are not newcomers to the field. Idemitsu started its foundational work on solid-state batteries in 2001, while Toyota initiated its research in 2006. Their combined efforts will now concentrate on sulfide solid electrolytes, known for their high energy capacity, power output, and adaptability to mass production.

Toyota bZ4X | Photo: Toyota

A dedicated task force comprising dozens of members has been formed to oversee the development. This task force will follow a three-phase roadmap, culminating in the anticipated 2027-2028 commercialization. Idemitsu is already in the process of building a large pilot factory for sulfide solid electrolytes, signaling the seriousness of their commitment. Both companies are optimistic about the global potential of these batteries and are working diligently to ensure the technology’s success.

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