Compositions – Electrically conductive or emissive compositions – Metal compound containing
Patent
1998-10-02
2000-03-28
Gupta, Yogendra
Compositions
Electrically conductive or emissive compositions
Metal compound containing
429128, 429218, 429223, H01B 102, H01B 106
Patent
active
060427531
ABSTRACT:
Active materials for positive electrodes in alkaline storage batteries excellent in capacity density, discharge voltage, and high rate discharge characteristics can be provided by coating the surface of the active material powder with an .alpha.-like Al-substituted Ni(OH).sub.2. Moreover, active materials excellent in capacity density, discharge voltage and high rate discharge characteristics, and besides in high-temperature charging efficiency and/or charge and discharge characteristics can be provided by dissolving in solid state and/or coprecipitated state at least one different metal element selected from Ca, Cr, Y, Ti and Co in the .alpha.-like Al-substituted Ni(OH).sub.2 layer. Furthermore, active materials excellent in capacity density, discharge voltage and high rate discharge characteristics, and besides in charge and discharge characteristics can be provided by coating with a Co oxide the surface of the active material powder coated with the .alpha.-like Al-substituted Ni(OH).sub.2.
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Delmas, et al. Solid State Ionics, "Nickel Hydroxide and Derived Phases Obtained By Chimie Douce From NaNiO.sub.2 " vols. 32-33, pp. 104-111 (1989).
Faure, et al., J. Power Sources, "Preparation and Characterization of Cobalt-Substituted .alpha.-Nickel Hydroxides Stable In KOH Medium Part I. .alpha.'-Hydroxide with an Ordered Packing" vol. 35, pp. 249-261 (1991).
Faure, et al., J. Power Sources, "Infrared Characterization of Turbostratic .alpha.-and Well Crystallized .alpha.*-Cobalted Nickel Hydroxides" vol. 36, pp. 113-125 (1991).
Borthomieu, et al., Materials Science Forum, "Interstratification In the Substituted Nickel Hydroxides", vols. 152-153, pp. 201-204 (1994).
Izumi Hidekatsu
Izumi Yoichi
Kimiya Hirokazu
Matsumoto Isao
Sakamoto Hiroyuki
Gupta Yogendra
Hamlin Derrick G.
Matsushita Electric - Industrial Co., Ltd.
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