US Patent 10177417 Iron-sulphide-based battery and anode

A battery including an anode including iron sulphide as active material, with the sulphur content being at least 5 wt. % of the total of iron and sulphur, a cathode, and an alkaline electrolyte including an alkaline component dissolved in water, with the anode including less than 50 wt. % of other active materials than iron sulphide. Preferably, the sulphur content of the anode is more than 10 wt. % of sulphur, calculated in the total of iron and sulphur and 70 wt. % or less.