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AssigneeSony Corporation
InventorsKenta Yamamoto, Osamu Takahashi, Kazuo Honda, Kuniyasu Oya
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The present invention provides a nickel-zinc battery of an inside-out structure, that is, a battery comprising a positive electrode containing beta-type nickel oxyhydroxide and a negative electrode containing zinc and having a similar structure to an alkali manganese battery, in which the beta-type nickel oxyhydroxide consists of substantially spherical particles, mean particle size of which is within a range from 19 μm to a maximum of 40 μm, the bulk density of which is within a range from 1.6 g/cm3 to a maximum of 2.2 g/cm3, tap density of which is within a range from 2.2 g/cm3 to a maximum of 2.7 g/cm3, specific surface area which based on BET method is within a range from 3 m2/g to a maximum of 50 m2/g, and the positive electrode of the nickel zinc battery contains graphite powder, where the weight ratio of graphite powder against a total weight of the positive electrode is defined within a range from 4% to a maximum of 8%.
Beta-type nickel oxyhydroxide comprising substantially spherical particles.
Beta-type nickel oxyhydroxide containing alkaline cation disposed between layers thereof.
A method of producing beta-type nickel oxyhydroxide comprising a step of oxidizing nickel hydroxide in alkaline solution containing sodium hypochlorite.
A method of producing beta-type nickel oxyhydroxide comprising;
A positive electrode active material comprising beta-type nickel oxyhydroxide, wherein said beta-type nickel oxyhydroxide comprises substantially spherical particles.
A positive electrode active material comprising beta-type nickel oxyhydroxide, wherein said beta-type nickel oxyhydroxide has alkaline cation between its own layers.
A nickel-zinc battery comprising;
A nickel-zinc battery comprising:
Dependencies are inferred from the claim text.