Kabushiki Kaisha Toshiba

Toshiba Battery Co., Ltd.

Shinji Tsuruta

Motoya Kanda

Tatsuoki Kohno

Nobukazu Suzuki

Masao Yamamoto

Shuji Yamada

Ken Uchida

Hirokazu Niki

Akinori Hongu

Yuu Kondou

Kunihiko Sasaki

Yoshiko Kanazawa

Koji Hashimoto

Hideki Yoshida

Masaaki Yamamoto

Hiroyuki Hasebe

Ken-ichi Kanno

Kiyoshi Ishitsuka

Ken Komiyama

Hidekazu Oppata

Koji Hasimoto

Hydrogen-absorbing alloy, method of surface modification of the alloy, negative electrode for battery and alkaline secondary battery

Hydrogen absorbing alloy, method of surface modification of the alloy, negative electrode for battery and alkaline secondary battery

A hydrogen-absorbing alloy which is excellent in stability in an aqueous solution and in mechanical pulverizability is disclosed. This hydrogen-absorbing alloy contains an alloy represented by the following general formula (I):

Hydrogen-absorbing alloy, method of surface modification of the alloy,

A hydrogen-absorbing alloy which comprises a first region comprising 50 to 75 mole % of Mg and not more than 50 mole % of Ni, and at least two regions selected from the group consisting of a second region comprising less than 50 mole % (including 0 mole %) of Mg and less than 75 mole % of Ni, a third region comprising not less than 75 mole % of Mg, and a fourth region comprising not less than 75 mole % of Ni.

Hydrogen-absorbing alloy, electrode and alkaline secondary battery

Disclosed is a method of manufacturing an alkaline secondary battery improved in the positive electrode utilization, the large-current discharge characteristic, the discharge capacity, and the capacity recovery ratio after storage. This method of manufacturing an alkaline secondary battery comprising a positive electrode containing a nickel compound and a cobalt compound, a negative electrode and an alkaline electrolyte, the method comprising the step of performing initial charging which comprises a charging process of supplying a current I (mA) satisfying the following Inequality (1):

Alkaline secondary battery manufacturing method, alkaline secondary

In a fuel cell comprising a stack having superposed a plurality of electromotive parts composed of a fuel electrode, an oxidizing electrode, and an electrolyte layer nipped by the two electrodes and using a liquid fuel as the fuel for the fuel cell, this invention contemplates forming a liquid fuel introducing path destined to be directly exposed to the liquid fuel on terminal surfaces of the component parts of the electromotive parts in a direction perpendicular to the flow of an oxidizing gas along at least one of the outer peripheral surfaces of the stack including the terminal surface of the fuel electrode and lying parallelly to the flow of the oxidizing gas and enabling the liquid fuel in the liquid fuel introducing path to be supplied to the fuel electrodes by a capillary attraction. A fuel cell provided with means for recovery of the water produced by the cell reaction in the oxidizing electrodes is also disclosed, which fuel cell effects the removal of the water produced in the oxidizing electrodes during the operation of the fuel cell by a capillary attraction generated by two porous members, i.e. a first porous member disposed in the oxidizing electrodes and a second porous member adjoined to the first porous member and possessed of a smaller average pore diameter than the first porous member.

Fuel cell

In a fuel cell comprising a stack having superposed a plurality of electromotive parts composed of a fuel electrode, an oxidizing electrode, and an electrolyte layer nipped by the two electrodes and using a liquid fuel as the fuel for the fuel cell, this invention contemplates forming a liquid fuel introducing path destined to be directly exposed to the liquid fuel on terminal surfaces of the component parts of the electromotive parts in a direction perpendicular to the flow of an oxidizing gas along at least one of the outer peripheral surfaces of the stack including the terminal surface of the fuel electrode and lying parallelly to the flow of the oxidizing gas and enabling the liquid fuel in the liquid fuel introducing path to be supplied to the fuel electrodes by a capillary attraction. A fuel cell provided with means for recovery of the water produced by the cell reaction in the oxidizing electrodes is also disclosed, which fuel cell effects the removal of the water produced in the oxidizing electrodes during the operation of the fuel cell by a capillary attraction generated by two porous members.

There is disclosed a composite membrane and an air electrode for use in hydrogen-oxygen fuel cells, metal-air cells and oxygen sensors. The composite membrane includes a porous membrane having micropores with a thin layer affixed thereto. The thin layer having metallic oxide in a carbon matrix, so that oxygen gas is able to permeate therethrough, but water vapor in air is not allowed to permeate therethrough.

Oxygen permeable membrane

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Yokohama, Japan

Shinji Tsuruta