Alkaline secondary battery, nickel hydrogen secondary battery, and production methods therefor

A nickel hydrogen secondary battery comprising:

• a positive electrode containing nickel hydroxide as an active material;
• a negative electrode containing a hydrogen storage alloy as an active material;
• and
• an alkaline electrolyte solution,
• wherein:
• the positive electrode contains 3.0 wt % or more of an ytterbium compound with respect to the nickel hydroxide;
• the negative electrode contains Mn;
• and
• an amount of the alkaline electrolyte solution is 1.5 mL/Ah or more with respect to a capacity of the positive electrode.

A method for producing an alkaline secondary battery including a positive electrode containing nickel hydroxide as an active material, a negative electrode, and an alkaline electrolyte solution, the method comprising:

• preparing a positive electrode slurry by adding 3.0 wt % or more of an ytterbium compound to the nickel hydroxide in which Mn is solid-dissolved;
• preparing the positive electrode by coating or filling a conductive core material with the positive electrode slurry;
• and
• injecting the alkaline electrolyte solution such that an amount of the electrolyte solution is 1.5 mL/Ah or more with respect to a capacity of the positive electrode.

A method for producing a nickel hydrogen secondary battery including a positive electrode containing nickel hydroxide as an active material, a negative electrode containing a hydrogen storage alloy as an active material, and an alkaline electrolyte solution, the method comprising:

• preparing a positive electrode slurry by adding 3.0 wt % or more of an ytterbium compound to the nickel hydroxide;
• preparing the positive electrode by filling a conductive core material with the positive electrode slurry, and performing drying and rolling;
• preparing a negative electrode slurry by adding Mn or a Mn compound to the hydrogen storage alloy;
• preparing the negative electrode by coating a conductive core material with the negative electrode slurry, and performing drying and rolling;
• and
• injecting the alkaline electrolyte solution such that an amount of the electrolyte solution is 1.5 mL/Ah or more with respect to a capacity of the positive electrode.