Method for manufacturing electrode, electrode manufactured by same, electrode structure including electrode, fuel cell or metal-air secondary battery, battery module including cell or battery, and composition for manufacturing electrode

A method for manufacturing a battery or a fuel cell electrode, the method comprising:

• forming a film by applying a composition comprising a precursor of a composite metal oxide onto a base material,
• wherein the precursor of the composite metal oxide comprises:
• a first precursor comprising one to three first metals selected among lanthanum (La), strontium (St), gadolinium (Gd), samarium (Sm), barium (Ba), and bismuth (Bi);
• and
• a second precursor comprising one to three second metals selected among manganese (Mn), cobalt (CO), iron (Fe), nicel (Ni), and calcium (Ca);
• wherein the base material is an electrolyte membrane;
• and
• manufacturing an electrode by firing the film,
• wherein in the firing, the film is sintered while the precursor of the composite metal oxide undergoes a chemical transformation to form a composite metal oxide.