Nickel-hydrogen storage battery and method of producing the same
AssigneeSanyo Electric Co., Ltd.
InventorsKoji Miki, Tadashi Ise, Masao Takee
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Abstract
A nickel-hydrogen storage battery having improved charge and discharge cycle characteristics even in high temperature, which has a negative electrode comprising a hydrogen absorbing alloy capable of electrochemically storing and releasing hydrogen, a positive electrode comprising nickel hydroxide as a main active material, and an alkaline electrolytic solution mainly comprising an aqueous potassium hydroxide solution, wherein the positive electrode contains a cobalt compound, a yttrium compound, and 100 ppm or more of lithium based on the total weight of the nickel hydroxide, the cobalt compound, and the yttrium compound.
Claims5
A method of producing a nickel-hydrogen storage battery comprising the steps of:
- forming a negative electrode comprising a hydrogen absorbing alloy capable of electrochemically storing and releasing hydrogen, as a negative electrode active material;
- forming a positive electrode comprising nickel hydroxide as a main active material in which a cobalt compound and a yttrium compound are previously added and
- mounting the negative electrode and the positive electrode with an alkaline electrolytic solution mainly comprising an aqueous potassium hydroxide solution in which lithium hydroxide is added, to form the battery;
- and
- activating the battery by carrying out charging and discharging in such a manner that the battery voltage at the end of the discharge may be 1.15 V or higher for the first time.
Dependencies are inferred from the claim text.