METAL-AIR BATTERY

PROBLEM TO BE SOLVED: To provide a secondary battery module in which the energy density of a lithium (Li) ion secondary battery can be achieved, and to provide a manufacturing method therefor.SOLUTION: The metal-air battery comprises: a positive electrode 2 containing carbon graphite for oxidizing-reducing oxygen; a negative electrode 1 consisting of a metal electrode; and a separator 7 interposed between an electrolyte layer 6 and the electrodes. Interior of the positive electrode 2 is composed of a positive electrode catalyst 13 consisting of manganese dioxide and silicon (silicon Di, siloxane) particulates, the outer surface is composed of an oxygen permeation film 10, e.g., an isoprene thin film, not permeating carbon dioxide and moisture in the air, and a metal mesh 11 of titanium, or the like, and the inner surface of the negative electrode 1 composed of an alloy of aluminum or magnesium consists of an irregular negative electrode surface treatment film 12. The electrolyte 6 is mainly composed of a chloride of aluminum or magnesium, and contains an electrolytic additive 14 such as citric acid or malic acid.