Potassium ion secondary battery

Abstract

To provide a potassium ion secondary battery with a high potential which can be manufactured at a lower cost.SOLUTION: The potassium ion secondary battery according to the present disclosure includes K2MnxFe(2-x)(CN)6 (0.2≤x≤0.8) in a positive electrode. Setting x to be 0.8 at a maximum can suppress the content of manganese, which is expensive, and the manufacturing cost can be therefore reduced. Setting x to be at least 0.2 can suppress activation in a low-potential region and a high potential can be therefore attained.SELECTED DRAWING: Figure 2

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