Alkaline battery
An alkaline battery according to the present invention is provided with a positive electrode, a negative electrode, and an alkaline electrolyte solution. The negative electrode contains zinc alloy powder, a gelling agent, and an alkaline electrolyte solution. The zinc alloy powder is constituted by a zinc alloy containing 600 to 3000 ppm of aluminum. The zinc alloy powder contains particles with a particle size of 75 μm or less, in a mass ratio of 10 to 40 mass % of all the particles. Furthermore, it is preferable that the negative electrode further contains an indium compound.
1 . An alkaline battery, comprising a positive electrode, a negative electrode, and an alkaline electrolyte solution,
wherein the negative electrode contains zinc alloy powder, a gelling agent, and an alkaline electrolyte solution,
the zinc alloy powder is constituted by a zinc alloy containing 600 to 3000 ppm of aluminum, and
the zinc alloy powder contains particles with a particle size of 75 μm or less, in a mass ratio of 10 to 40 mass % of all the particles.
2 . The alkaline battery according to claim 1 ,
wherein the negative electrode further contains an indium compound.
3 . The alkaline battery according to claim 2 ,
wherein the indium compound is at least one selected from the group consisting of indium hydroxide and indium oxide.
4 . The alkaline battery according to claim 2 ,
wherein a content of the indium compound is 50 to 500 ppm with respect to a total mass of the zinc alloy powder and the indium compound.
5 . The alkaline battery according to claim 1 ,
wherein the negative electrode further contains an indium compound, and indium is segregated on a surface of the zinc alloy powder.
6 . The alkaline battery according to claim 5 ,
wherein the indium compound is at least one selected from the group consisting of indium hydroxide and indium oxide.
7 . The alkaline battery according to claim 5 ,
wherein a content of the indium compound is 50 to 500 ppm with respect to a total mass of the zinc alloy powder and the indium compound.
8 . The alkaline battery according to claim 1 ,
wherein a content of the zinc alloy powder in the negative electrode is 60 to 75 mass % in mass ratio with respect to the entire negative electrode.
9 . The alkaline battery according to claim 1 ,
wherein the gelling agent is at least one selected from the group consisting of carboxymethyl cellulose, polyacrylic acid, and sodium polyacrylate.
10 . The alkaline battery according to claim 1 ,
wherein a content of the gelling agent in the negative electrode is 1.5 to 3 mass % in mass ratio with respect to the entire negative electrode.
11 . The alkaline battery according to claim 1 ,
wherein the positive electrode contains a metal oxide and a conductive material.
12 . The alkaline battery according to claim 11 ,
wherein the metal oxide is manganese dioxide.
13 . The alkaline battery according to claim 11 ,
wherein the conductive material is graphite.
14 . The alkaline battery according to claim 1 ,
wherein the alkaline electrolyte solution is an aqueous solution of an alkali metal hydroxide.
15 . The alkaline battery according to claim 14 ,
wherein the alkali metal hydroxide is at least one selected from the group consisting of potassium hydroxide and sodium hydroxide.