Metal-air battery

A method of manufacturing a metal-air battery, the method comprising:

• providing a negative electrode metal layer, a negative electrode electrolytic film, and a positive electrode layer configured to use oxygen as an active material, wherein the negative electrode electrolytic film is between the negative electrode metal layer and the positive electrode layer;
• bending the negative electrode metal layer, the negative electrode electrolytic film, and the positive electrode layer around three surfaces of a first gas diffusion layer;
• reversely bending the negative electrode metal layer, the negative electrode electrolytic film, and the positive electrode layer by 180 degrees;
• disposing a second gas diffusion layer on the positive electrode layer;
• secondly bending the negative electrode metal layer, the negative electrode electrolytic film, and the positive electrode layer so that the positive electrode layer contacts a top surface of the second gas diffusion layer to form a first cell;
• repeating the providing, the bending, the reversely bending, the disposing and the secondly bending to form a second cell;
• and
• contacting a surface of the first cell and a surface of the second cell to manufacture the metal-air battery,
• wherein each of the first cell and the second cell has an open surface through which at least a portion of the gas diffusion layer is in fluid communication with outside air, and
• wherein a direction of the open surface of the first cell is different from a direction of the open surface of the second cell.