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Technology

Toyota secures huge lead in solid-state battery patents

Japanese companies dominate top 10 but South Korean rivals gaining ground

TOKYO -- Toyota Motor is by far the leading holder of solid-state battery patents, a Nikkei study shows, demonstrating how Japanese companies have dominated the race to develop the next-generation power source for electric vehicles.

Solid-state batteries do away with liquid electrolytes used in conventional lithium-ion batteries. TDK and other companies have already put miniature solid-state batteries on the market, but solid-state batteries for EVs are still in the prototype stage.

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