Patent ID: 8859140

Claim:
An electrode for a molten salt battery, the electrode comprising: a current collector connectable to an electrode terminal of the molten salt battery; and an active material, wherein the current collector has an internal space in which small spaces are coupled, the internal space is filled with the active material, wherein a void into which molten salt is flowable is provided in the electrode, wherein a direction from a positive electrode to a negative electrode in a state where the electrode is attached to the molten salt battery is defined as an electric field direction, and the void is a through hole extending along the electric field direction, wherein an interval between adjacent voids is set to a reference distance or less, the reference distance being determined based on a critical immersion distance, wherein the reference distance is set to twice the critical immersion distance to which an ion of a molten salt permeates the electrode, wherein the molten salt is electrolyte, the electrolyte is NaFSA-KFSA containing an anion represented by the following formula (1), a sodium cation, and potassium cation: where R 1 and R 2 each denote fluorine, and wherein the molar ratio of KFSA is set in the range of 0.4 or more and 0.7 or less.