ALKALI BATTERY

摘要

An alkali battery comprising a positive electrode, a negative electrode and an alkali electrolyte, wherein the positive electrode contains a positive electrode mixture containing nickel oxyhydroxide, electrolytic manganese dioxide and expanded graphite, this expanded graphite having an average particle diameter on volume basis of 5 to 25 µm, a BET specific surface area of 4 to 10 m²/g and a bulk specific gravity (apparent density), measured by the still standing method, of 0.03 to 0.10 g/cm³, the nickel oxyhydroxide exhibiting an average nickel valence of = 3.05, the content of the expanded graphite being in the range of 3 to 15 wt.% based on the total amount of the nickel oxyhydroxide, electrolytic manganese dioxide and expanded graphite contained in the positive electrode mixture.