Molten-salt battery

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Molten-salt batteries are a class of battery that uses molten salts as an electrolyte and offers both a high energy density and a high power density. Traditional non-rechargeable thermal batteries can be stored in their solid state at room temperature for long periods of time before being activated by heating. Rechargeable liquid-metal batteries are used for industrial power backup, special electric vehicles^{[citation needed]}and for grid energy storage, to balance out intermittent renewable power sources such as solar panels and wind turbines.

In 2023, the use of molten salts as electrolytes for high-energy rechargeable lithium metal batteries was demonstrated.^[1][2]