Where Is There More Lithium to Power Cars and Phones? Beneath a California Lake. – The Wall Street Journal

CALIPATRIA, Calif.—In the U.S. hunt for lithium, an essential component of the batteries that power electric vehicles and cellphones, one big untapped source might be bubbling under a giant lake in Southern California.

The U.S. currently imports almost all of its lithium, but research shows large reserves in underground geothermal brines—a scalding hot soup of minerals, metals and saltwater. The catch: Extracting lithium from such a source at commercial scale is untested.