Hitachi Maxell, Limited

Kenichi Yokoyama

Yoshio Uetani

Seiichi Matsushima

Kiyoshi Sato

Yasuyoshi Taniguchi

Shigeru Ikenari

Hirokazu Yoshikawa

Saburo Nonogaki

Akira Miyake

Akira Kawakami

Kazusuke Yamanaka

Tsunemi Ohiwa

Osamu Watanabe

Toshikatsu Manabe

Kenichi Sawada

Shuichi Wada

Yukihiro Hayashi

Kenya Kazehara

Masakazu Oshimura

Sonae Kirihara

Tatsuya Kitai

Siro Azuma

Tugiyasu Iwamaru

Hisashi Urushiwara

Noriyuki Itoh

An inorganic nonaqueous electrolytic solution cell containing an oxyhalide which is in a liquid state at room temperature as a positive electrode active material, and a solvent of an electrolytic solution and an alkali metal as a negative electrode active material, in which the electrolytic solution contains a tertiary or quaternary organic silane compound, and a Lewis acid is dissolved in the electrolytic solution in an amount larger than a stoichiometric equivalent of a Lewis base which comprises a halide of an alkali metal present in the electrolytic solution.

Inorganic nonaqueous electrolytic solution cell

A flat disc type sealed battery comprises a battery vessel having a bottom wall with an electrolyte charging opening formed in the central portion thereof, and a battery lid member for covering the upper opening of the battery vessel. Power generating components are enclosed by sealing the battery vessel battery lid member, and a first sealing member is provided for sealing the electrolyte charging opening after the electrolyte is charged into the battery vessel, and a second sealing member is provided for covering the aperture in the side of the lower edge portion of the electrolyte charging opening. The outer peripheral portion of the second sealing member is welded to the bottom wall of the battery vessel to perfectly seal the battery vessel.

Flat type sealed battery with hermetic sealing structure

In a non-aqueous electrochemical battery, there are formed a plurality of grooves with thinned bottom portion on the bottom of the battery container. The grooves are intersected at least at one point and the bottom of the grooves are made flat so that the explosion-proof arrangement is operable for a desired inner pressure of the battery.

Non aqueous electrochemical battery with explosion proof arrangement and

An electrochromic display device which comprises a display electrode comprising a transparent substrate, a transparent electrode formed on an inner surface of the transparent substrate and an electrochromic material layer for display made of tungsten oxide and formed on the transparent electrode; a counter electrode comprising a substrate, a conductive layer formed on an inner surface of the substrate and an activated carbon fiber material; and a spacer provided between the display electrode and the counter electrode with their inner surfaces facing each other to define, between them, an electrolyte chamber, which is filled with an electrolyte comprising a lithium salt and at least one of the tertiary alkyl ammonium salts and quarternary alkyl ammonium slats dissolved in a non-aqueous medium containing a small amount of water, which device has increased original injected charge which can last for a long time.

Electrochromic display device

An electrical double layer capacitor containing at least one electrical double layer unit which comprises a pair of electrodes separated by a separator and positioned between a pair of collecting plates with an insulating ring being provided with around the periphery of the electrodes, wherein the electrode comprises active carbon fiber fabric carrying active carbon powder thereon, which has stable capacitance and longer discharging time due to small internal resistance.

Electrical double layer capacitor and production of the same

A leak-proof alkaline cell comprising a positive can, a negative cap having a turned-up portion, said cap being fitted at the open end of the positive can and a gasket provided between the positive can and the negative cap, the rim of the positive can being crimped inwardly so as to press the gasket to the negative cap, the negative cap being made of a metal plate laminated with a copper layer which is adapted to be contacted with a negative electrode active material mix and the copper layer also extending to the outer surface of the negative cap facing the gasket, characterized in that the copper layer is eliminated at the ultimate terminal edge of the turned-up portion.

Leak-proof alkaline cell and its production

A leak-proof alkaline cell comprising a negative electrode collector and a gasket, characterized in that the negative electrode collector is coated with a film comprising a triazole compound at least at the part faced to the gasket.

Acicular ferromagnetic metal particles having a particle size of 0.1 to 1 .mu.m and a dimension of crystallite-size of not more than about 215 A in the effective thickness of the crystallite in the direction perpendicular to the reflecting plane (110), which have a high coercive force, preferably not less than 1,400 oersteds and are useful for a high-density magnetic recording tape, video mother tape, or permanent magnet material, and a method for the preparation of the ferromagnetic metal particles comprising reducing with heating goethite particles which are prepared by treating a ferrous salt with a large amount of a basic agent, particularly an alkali metal hydroxide.

Acicular ferromagnetic metal particles and method for preparation of the

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Takatsuki, Japan

Kenichi Yokoyama