A coated nickel hydroxide powder that has a cobalt compound coating having improved uniformity and adhesion properties on the surface of particles thereof and is therefore suitable for a positive electrode active material of an alkaline secondary battery is obtained by coating the surface of nickel hydroxide particles with a cobalt compound, and has a transmittance ratio of 30% or higher as determined by (A−B.sub.max)/(B.sub.0−B.sub.max). The transmittance A (coated nickel hydroxide powder), the transmittance B.sub.0 (nickel hydroxide powder), or the transmittance B.sub.max (nickel hydroxide powder and cobalt compound containing cobalt in an amount corresponding to the amount of cobalt contained in the coating) can be determined by measuring the transmittance of a tubular transparent cell after shaking the tightly-closed transparent cell containing each powder for a certain time and then taking the contents out of the transparent cell.

A method of forming an electrode in an electrochemical battery comprises coating a reticulated substrate with a first wash, the first wash having a conductive material with conductive fibrous members and curing the reticulated substrate coated with the first wash having the conductive material with the conductive fibrous members.

An alkaline battery, and a component cathode including a solid ionically conducting polymer material.

An alkaline battery, and a component cathode including a solid ionically conducting polymer material.

The invention relates to a reversible manganese dioxide electrode, comprising an electrically conductive carrier material having a nickel surface, a nickel layer made of spherical nickel particles adhering to each other and having an inner pore structure applied to the carrier material, and a manganese dioxide layer applied to the nickel particles, wherein the manganese dioxide layer is also present in the inner pore structure of the nickel particle.

The invention also relates to a method for producing such a manganese dioxide electrode, the use thereof in rechargeable alkaline-manganese batteries, and a rechargeable alkaline-manganese battery containing a manganese dioxide electrode according to the invention.

The active element of an electrochemical apparatus for producing electrical power and/or hydrogen may be formed as a massive metal body or a mesh-type or perforated sheet-type support structure. The support structure may be made from at least one of magnesium, zinc, aluminum, manganese, iron, or titanium, or an alloy of at least one of these, and may include a coating of boron enhanced carbon/graphite/graphene or a boron enhanced material. The boron enhanced material may include at least two elements selected from carbon/graphite/graphene, nickel, tungsten, phosphorous, and copper.

A negative electrode used in a nickel metal hydride secondary battery includes a negative electrode core body and a negative electrode mixture carried on the negative electrode core body. The negative electrode mixture includes hydrogen storage alloy powder which is an aggregate of hydrogen storage alloy particles, a binder, and a thickener. The hydrogen storage alloy particles have a volume mean particle size of 40 μm or less and a concentration of chlorine of not less than 180 ppm to not more than 780 ppm.

A nickel-containing hydroxide particle covered with cobalt capable of preventing cracks and fissures in the particle and fine powder from being generated due to having an excellent particle strength is provided. The nickel-containing hydroxide particle covered with cobalt, including a covering layer containing cobalt oxyhydroxide formed on a nickel-containing hydroxide particle, wherein an average particle strength is 65.0 MPa or more and 100.0 MPa or less for a particle diameter with a cumulative volume percentage of 50% by volume (D50) of 10.0 μm or larger and 11.5 μm or smaller.

Disclosed herein is a method of manufacturing an electrode for a secondary battery, including: a process of continuously forming two or more slurry coated parts on one surface or both surfaces of metal foil in a second direction which is a longitudinal direction of the metal foil so that a non-coated part which an electrode slurry is not coated is positioned between the slurry coated parts coated with the electrode slurry including an electrode active material in a first direction which is a transverse direction of the metal foil; a process of forming mixture coated parts by drying the slurry coated parts and rolling by a roller; and a process of forming electrode strips by slitting the non-coated part in the second direction, wherein before continuously forming the slurry coated parts, while continuously forming the slurry coated parts, or between continuously forming the slurry coated parts and forming the mixture coated parts, the method further includes a process of forming non-continuous linear slits in the non-coated part of the metal foil in the second direction.

Provided is a method for producing a composite alloy for use in an electrode for an alkaline storage battery, including a powder preparation step of preparing a hydrogen storage alloy powder containing Ti and Cr and having a BCC structure, an etching step of applying an acid to the hydrogen storage alloy powder prepared in the powder preparation step, a Pd film forming step of coating the surface of the hydrogen storage alloy powder subjected to the etching step with Pd using a substitution plating method, and a heat treatment step of heating the hydrogen storage alloy powder having a Pd film formed, at said heating being a temperature of 500° C. or less, wherein in the Pd coating forming step, the hydrogen storage alloy powder is coated with Pd under the condition that the Pd element weight ratio of the composite alloy to be produced is 0.47% or more.