An object of the present invention is to provide a hydrogen absorbing alloy which can improve a high rate discharge property while suppressing particle size reduction, exhibits cycle life characteristics equal to or higher than those of conventional alloys...

A battery highly inhibited from suffering self-discharge. The battery is characterized by containing a built-in polymer which has in the molecule a carbodiimide unit represented by the following formula (I): -Ä-R-N=C=N-Ün- (wherein R means an organic gro...

In a nickel-metal hydride rechargeable battery comprising a positive electrode of nickel hydroxide and a negative electrode of hydrogen-absorption alloy, prolonged battery life is achieved by limiting the charge and discharge operations to be performed in ...

A separator for a battery having a zinc electrode. The first embodiment of the separator comprises a microporous membrane and a coating on at least one surface of the membrane. The coating comprises a mixture of cellulose acetate and a surfactant. The surf...

The present invention is to provide a nickel-metal hydride storage battery comprising a positive electrode (1) mainly composed of nickel hydroxide, a negative electrode (2) mainly composed of a hydrogen storage alloy powder electrochemically absorbing and ...