Yuasa Corporation

Minoru Kuzuhara

Masahiko Oshitani

Masaharu Watada

Toshiki Tanaka

Kengo Furukawa

Hiroe Nakagawa

Seijiro Ochiai

Masuhiro Ohnishi

Mitsuhiro Kodama

Yuichi Matsumura

Masaki Miyamoto

Takehito Bogauchi

Yoshihiro Katayama

Kouichi Sakamoto

Kaori Syodai

Manabu Kanemoto

Noboru Miyake

For accomplishing the subjects, the invention provides a nickel electrode material for use in a nickel electrode, wherein the positive-electrode material constituting the electrode material comprises: positive active material particles which comprise as the main component either a nickel hydroxide or a solid solution in a nickel hydroxide of one or more other elements and in which part of the nickel hydroxide has been oxidized; and a coating layer formed on the surface of the positive active material particles and comprising as the main component a high-order cobalt compound in which the cobalt has an oxidation number larger than 2, the average oxidation number of the nickel in the positive active material particles and the cobalt in the coating layer being from 2.04 to 2.40, and the positive-electrode material having a tap density of 2.0 g/cmor higher. The invention further provides a process for producing the electrode material, a nickel electrode employing the electrode material, and an alkaline storage battery having the nickel electrode.

Nickel electrode material, and production method therefor, and nickel electrode and alkaline battery

A sealed alkaline storage battery including a nickel electrode as a positive electrode, characterized by having the function of being capable of charge when the gas pressure in the battery and/or the battery temperature is not higher than a specified value and of being incapable of charge when the gas pressure in the battery and/or the battery temperature exceeds the specified value.

Sealed alkaline storage battery, electrode structure and charging method for the same, and charger for sealed alkaline storage battery

Hydrogen absorbing electrode, nickel electrode and alkaline storage

A hydrogen absorbing electrode using a hydrogen absorbing alloy including at least one or more kinds of transition metals belonging to VIIb-group, VIII-group or Ib-group in periodic table at a specified percentage, characterized in that a surface part of the hydrogen absorbing alloy forms a rich layer including the foregoing transition metals at a percentage larger than the foregoing specified percentage. Since the rich layer exists, an activation at initial stage of charge/discharge is not required. Accordingly, this electrode can be utilized effectively for a nickel-hydride secondary battery.

Hydrogen absorbing electrode and its manufacturing method

Growing community of inventors

Osaka, Japan

Minoru Kuzuhara