What is Toyota Solid-State Battery (Idemitsu Partnership)?

Most electric cars use lithium-ion batteries, in which a liquid or gel carries charged particles (ions) between the two electrodes. A solid-state battery swaps that liquid for a solid electrolyte, which, according to Wikipedia, could in theory store more energy and avoid some problems of liquid cells, such as flammability. The companies' stated aim is to develop the technology to make the solid material at mass-production scale. This project is a cooperation between Idemitsu Kosan and Toyota Motor Corporation to develop mass-production technology for sulfide solid electrolytes, a family of materials the companies describe as soft and adhesive to other materials, which they say suits mass production of batteries, for use in all-solid-state batteries for battery electric vehicles. The two companies announced the agreement on 12 October 2023.

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