Electrically conductive filler such as carbon fibers, carbon particles, Ni fibers, Ni particles, Ni foil, Ni-plated fibers, or Ni-plated particles is added to an active material powder such as nickel hydroxide, which is formed into active material products...

An electrochemically active material comprises a hydride alloy of which the surface is coated with a protective layer made up principally of nickel hydroxide. By preference the layer is made up of at least 80% by wt of nickel hydroxide and incorporates up ...

An active material slurry 12a obtained by a mixing a powder of the active material with a binder and a solvent for the binder is heated to a predetermined temperature inside a slurry reservoir 20, and the heated active material slurry 12a is coated and adh...