| abstract |
PURPOSE: To prevent the swelling of an electrode by simultaneously adding at least one of zinc, cadmium, and magnesium, and cobalt in the form of a solid solution to nickel hydroxide powder and furthermore forming a cobalt oxyhydroxide layer thereon. n CONSTITUTION: At least one of zinc, cadmium, and magnesium, and cobalt are simultaneously added to nickel hydroxide powder 1 in the form of a solid solution, and a cobalt oxyhydroxide layer 2 is formed thereon. Hydrogen bonding between active material layers is strongly retained, and passing of cations and water molecules through an active material is blocked. By the synergistic effect of these two functions, increase in internal pore volume and the swelling of an electrode are avoided. n COPYRIGHT: (C)1991,JPO&Japio |