Matsushita Electric Industrial Co., Ltd.

Panasonic Corporation

Asahi Glass Company, Limited

Toru Inagaki

Hiroki Takeshima

Masayuki Saito

Hideo Kaiya

Haruya Nakai

Yusuke Ozaki

Katsuhiro Okamoto

Kazushige Sugimoto

Yasushi Nakamura

Yoichi Izumi

Hiroyuki Sakamoto

Futoshi Tanigawa

Hidekatsu Izumi

Akihiro Maeda

Yohei Hattori

Yoshio Goda

Takeshi Yoshinaka

Shogo Yamamoto

A positive electrode for an alkaline storage battery is disclosed, comprising a conductive base material and an active material layer attached to the base material, the active material layer comprising an active material and a binder, the binder comprising an elastic copolymer comprising one or more tetrafluoroethylene units and one or more propylene units.

Positive electrode for alkaline storage battery

Positive electrode binder for alkaline storage battery

The battery electrode plate includes a core member () which is densely coated with a mixture paste chiefly including an active material (). The core member () is made of a metal sheet (), which is formed with rows () of first and second bowed portions () arranged along one direction (X) of the metal sheet so as to protrude alternately on the front and back sides of the metal sheet, the rows () of bowed portions arranged along the direction (Y) orthogonal to the direction (X) with flat parts () of a predetermined width interposed between each two rows. The battery electrode plate is produced by any of a reciprocating type continuous press method, a rotary type molding method, and an electrolytic deposition method.

Electrode plate for cell and method for manufacturing the same

The present invention provides a high-capacity sealed nickel-metal hydride storage battery superior in high-current discharge, without extending the injection time of an electrolyte. This battery includes an electrode group, a metal case for accommodating the electrode group, and a seal plate provided with a safety vent, for sealing an opening of the case, and the electrode group has a structure in which, round a non-sintered type cylindrical electrode of one polarity, a non-sintered type hollow cylindrical electrode of the other polarity and a non-sintered type hollow cylindrical electrode of the one polarity are layered alternately in the form of concentric circles with a separator between the electrodes.

Sealed cylindrical nickel-metal hydride storage battery

In order to provide a positive electrode active material capable of producing an alkaline storage battery having a high discharge voltage and an excellent discharge characteristic and also provide a positive electrode and alkaline storage battery containing thereof, a positive electrode active material for an alkaline storage battery comprising a nickel hydroxide powder is used, in which the nickel hydroxide is a solid solution containing magnesium, the magnesium content in the nickel hydroxide is 2 to 7 mol % of all metallic elements contained in the nickel hydroxide, the tap density of the nickel hydroxide is 1.9 g/cm or more, the half-width of a peak attributed to (101) face near 2&thgr;&equals;37 to 40&deg; in a powder X-ray diffraction pattern of the nickel hydroxide by CuK&agr; radiation is 0.7 to 1.2&deg; and the sulfate ion content in the nickel hydroxide is 0.5 wt % or less.

Positive electrode active material for alkaline storage batteries, and positive electrode and alkaline storage battery using the same

Disclosed is an alkaline storage battery which exhibit exceptional charge/discharge and cycle life characteristics by improved current collection and active material retention of the electrode substrate. The electrode comprises a substrate composed of a conductive core material and fibrous nickel members unitary sintered on both surfaces of the conductive core material, and a layer of an active material filled into the substrate. The fibrous nickel members of the substrate are bent or curved at least at their tip ends inside the active material layer to retain the active material.

Alkaline storage battery and method for producing an electrode used

An electrode excellent in high-rate discharge characteristics is provided by increasing the adhesive strength of the conductive core material to the sintered nickel porous body which form the sintered type substrate. The electrode of the present invention uses a sintered substrate containing a part wherein the diameter of the pores of the sintered nickel porous body becomes successively smaller from the joining interfaces of the conductive core material toward the outside surfaces of the substrate. The region wherein the diameter is greater than in other parts preferably ranges within about 1/5 of the substrate thickness starting from both surfaces of the core material toward the outside surfaces of the substrate.

Electrode for alkaline storage batteries and process for producing the

As a nickel electrode for alkaline storage batteries, an electrode plate comprising a plurality of electroconductive substrates and a plurality of active material layers which are alternately laminated and integrated is used, whereby mutual electric conductivity of the active material and the electroconductive substrate in the direction of thickness is increased, and active material utilization, discharge voltage characteristics as batteries and charge-discharge repetition life are improved. The nickel electrode comprises a plurality of electrode leaves each of which comprises an electroconductive substrate coated with an active material and which are laminated and integrated so that the electroconductive substrate and the active material layer are alternated with each other, a plurality of said electroconductive substrates being electrically and mechanically connected through a part of the respective electroconductive substrates, said electroconductive substrate having a thickness of 5-60 .mu.m, said active material layer coated on the electroconductive substrate having a thickness of 20-250 .mu.m.

Alkaline storage batteries and nickel electrodes having plurality of

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Kamakura, Japan

Toru Inagaki