How do you know they are phasing out Lithium. Toyota just helped fund a $250m lithium project with ORE, and are working on Lithium Air batteries with BMW. Yes sodium is being researched, my understanding is its not yet comparable with Lithium as it doesn't hold the charges so well.
As to being unclear, Greenbushes has been running for 25 years and recently expanded output. If they thought the future was not there for Lithium, they may have given up long ago.
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