Composition, electrode having porous layer containing the composition, and metal-air secondary battery having the electrode

摘要

PROBLEM TO BE SOLVED: To provide a metal air secondary battery which can be charged and discharged over a long period of time by preventing a by-product produced by charge and discharge from being accumulated on an electrode.SOLUTION: A metal air secondary battery comprises: an air electrode layer; a negative electrode layer; and an electrolyte layer. The negative electrode layer includes a negative electrode for the metal air secondary battery in which a metal electrode layer being in contact with and covered with a porous layer. In the metal air secondary battery, the porous layer of the negative electrode for the metal air secondary battery is in contact with the electrolyte layer. A raw material composition of the porous layer comprises one or more kinds selected from a group consisting of oxide-based material and carbon-based material.SELECTED DRAWING: Figure 1