If the carmaker is successful, it could revolutionize the electric vehicle industry and Toyota’s place in it.

A start-up in Finland unveils the world’s first commercial heat storage system using sand to solve the problem of the variability of solar and wind power.

The metal is a key ingredient in the batteries that power all those electric cars.

California’s grid operator hoped new battery storage could prevent rolling blackouts. Installation has been delayed.

It’s not just a mining issue. China leads in processing and purifying the minerals, but the United States lags in that industrial sector.

Researchers are looking for alternative technologies that could offer safer, greener solutions.

A potential lack of government funding could help other countries pull ahead.

But it's just a matter of time before the problem is solved, a UC Berkeley engineer says.

A lesson in the perils of the race to thinner, more energy-packed devices.