Electrodes, alkaline secondary battery, and method for manufacturing alkaline secondary battery

A method of manufacturing an alkaline secondary battery comprising the steps of;

• assembling a battery unit comprising (a) a positive electrode containing nickel hydroxide having a value of 0.8° or more in the half-width of a peak in the (101) plane thereof as measured by X-ray powder diffraction (2θ) using Cu—Kα ray, at least one of a first material selected from the group consisting of cobalt and cobalt compounds, and 4.0 to 15% by weight of at least one of a second material selected from the group consisting of zinc and zinc compounds, the weight of said at least one of a second material being one calculated as zinc element and based on the weight of said nickel hydroxide, and (b) an alkali electrolyte, the ratio of which to theoretical capacity of the positive electrode being 0.7 to 2.0 cm3/Ah;
• and
• subjecting said battery unit to an initial charging at a temperature of 40 to 100° C.

An alkaline secondary battery comprising;

• a positive electrode containing nickel hydroxide having a value of 0.8° or more in the half-width of a peak in the (101) plane thereof as measured by X-ray powder diffraction (2θ) using Cu—Kα ray and at least one alkali metal selected from the group consisting of cesium, rubidium and potassium;
• and
• an alkali electrolyte, the ratio of which to theoretical capacity of the positive electrode being 0.7 to 1.3 cm3/Ah.

An electrode comprising;

• nickel hydroxide having a value of 0.8° or more in the half-width of a peak in the (101) plane thereof as measured by X-ray powder diffraction (2θ) using Cu—Kα ray and at least one alkali metal selected from the group consisting of cesium, rubidium and potassium.

A method of manufacturing an alkaline secondary battery comprising the steps of;

• assembling a battery unit comprising (a) a positive electrode containing nickel hydroxide having a value of 0.8° or more in the half-width of a peak in the (101) plane thereof as measured by X-ray powder diffraction (2θ) using Cu—Kα ray, at least one alkali metal selected from the group consisting of cesium, rubidium and potassium and at least one of a first material selected from the group consisting of cobalt and cobalt compounds, and (b) an alkali electrolyte, the ratio of which to theoretical capacity of the positive electrode being 0.7 to 1.3 cm3/Ah;
• and
• subjecting said battery unit to an initial charging at a temperature of 40 to 100° C.

An alkaline secondary battery comprising;

• a positive electrode which contains nickel hydroxide and particles containing cobalt hydroxide and having a tap density of 0.4 to 1.15 g/cm3.

An electrode comprising;

• nickel hydroxide and particles containing cobalt hydroxide and having a tap density of 0.4 to 1.15 g/cm3.

A method of manufacturing an alkaline secondary battery comprising the steps of;

• assembling a battery unit comprising a positive electrode which contains an active material containing nickel hydroxide, and not more than 6% by weight of at least one material selected from the group consisting of cobalt and cobalt compounds, the weight of said at least one material being one calculated as cobalt element and based on the weight of said active material;
• and
• subjecting said battery unit to an initial charging at a temperature of 40 to 100° C.

An alkaline secondary battery comprising;

• a positive electrode containing particles containing nickel oxide, and a conductive layer formed at least partially on the surfaces of said particles, said layer containing cobalt compounds and having a conductive surface region on which free electrons function as an electric charge carrier.