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Materials

GM invests in California geothermal lithium project

by Craig Bettenhausen
July 9, 2021 | A version of this story appeared in Volume 99, Issue 25

 

A photo of the Salton Sea in California.
Credit: Controlled Thermal Resources
California's Salton Sea is saltier than the ocean, and parts of it are volcanically active.

General Motors is investing in a facility to be built by Controlled Thermal Resources (CTR) that will use geothermal energy to extract lithium from brine. CTR already generates electricity from geothermal heat in California’s Salton Sea. The new plant, dubbed Hell’s Kitchen Lithium and Power, will extract lithium from brine as it harvests heat for power generation. GM’s electric vehicle operations will get rights to the 20,000 metric tons per year of battery-grade lithium hydroxide that CTR expects to produce in the first stage of the project.

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