The companies signed a Memorandum of Understanding, which also seeks to expand recycling efforts.
Analysis by BloombergNEF calls for more investment in low-carbon energy.
Artificial intelligence will be used to explore the Sheep Creek deposit in Montana, which also contains gallium.
Shenghe holds interest in multiple rare earth projects worldwide already, including in Tanzania.
The export of gallium from China increased significantly in April compared to the previous month.
Low price levels are not a sign of an all-clear.