Paste type positive electrode for alkaline storage battery, and nickel-metal hydride storage battery
DRIVE
September 26, 2001
The paste type positive electrode of the present invention contains a first active material, a second active material, and optionally cobalt hydroxide powder or cobalt oxyhydroxide powder. The first active material comprises X parts by weight of particulate nickel hydroxide with aX/100 parts by weight of cobalt oxyhydroxide carried thereon. The second active material comprises Y parts by weight of particulate nickel oxyhydroxide, of which an oxidation number of nickel is alpha , with bY/100 parts by weight of cobalt oxyhydroxide carried thereon. Here, all the following relations are satisfied: (1) 2.5 ≤ alpha < 3.0, (2) 0.01 ≤ (aX/100 + bY/100) / (X+Y) ≤ 0.20, (3) 0 < b ≤ a ≤ 10 or 0 = b < a ≤ 10, and (4) 2.1 ≤ (2X + alpha Y) / (X+Y) < 2.2.
Discussion in the ATmosphere