The following submission statement was provided by /u/Apart_Shock:

>Ambri is a Boston-area startup that’s building molten-salt batteries from calcium and antimony. The company recently announced a demonstration project deploying energy storage for Microsoft data centers, and last year it raised over $140 million to build its manufacturing capacity.
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>The company says its technology could be 30-50% cheaper over its lifetime than an equivalent lithium-ion system. Molten salt batteries can also exceed 80% efficiency, meaning that a relatively low amount of energy that’s used to charge the battery is lost to heat.

Please reply to OP's comment here: https://old.reddit.com/r/Futurology/comments/yzqa4q/superhot_salt_could_be_coming_to_a_battery_near/ix1eqm7/