Photo/IllutrationLithium-ion batteries are widely used for electric vehicles. (Asahi Shimbun file photo)

A lithium-ion battery more than three times as powerful as normal that could be used in vehicles and power grids has been developed by a team of academic and corporate researchers in Japan.

“It would take a while to apply the technology in practical products, but it has the biggest possibility of becoming the mainstream rechargeable battery of the next generation,” said Ryoji Kanno, a professor of electronic chemistry at the Tokyo Institute of Technology.

Kanno, a member of the research group that included Toyota Motor Co. and High Energy Accelerator Research Organization, an interuniversity research institute, announced the development on March 22.

The new “all-solid-state ceramic battery” is fast-charging and can be made smaller than regular batteries.

The team says the technology has advantages over other types of next-generation batteries currently under development, including sodium-ion or magnesium-ion ones.

As it does not use a liquid conductor, conductive material and electrodes can be placed without spaces in between, allowing for a high capacity and lightweight battery to be produced.

The team was looking into “super ionic conductors,” a solid-state, rather than liquid, conductive material, and found a substance that has higher conductivity than used in existing lithium-ion batteries. They constructed the experimental battery using the new material.

The prototype only has a small capacity but can be fully charged in one minute. As for capacity, it showed almost no sign of deterioration after being recharged 1,000 times.