Nickel positive electrode for alkaline rechargeable batteries and nickel-metal hydride batteries using the same positive electrode

摘要

In the paste type nickel positive electrode prepared by filling pores of a metal nickel plaque made of three-dimensional high porous sheet, or coating both sides or one side of a plaque made of either perforated nickel sheet or nickel plated steel sheet, with a paste type active material mainly composed of nickel hydroxide, by adding particles of cobalt hydroxide having the specific surface area of at least 10 m2/g, average particle size of 1.7 microns or more, and content of fine particles with particle size of 1.0 micron or less of 20% or less, the utilization of positive electrode active material is enhanced, and by using this nickel positive electrode, the alkaline rechargeable battery, in particular, the nickel-metal hydride alkaline battery is enhanced in capacity and extended in service life.