CATHODE FOR MOLTEN CARBONATE FUEL CELLS HAVING STRUCTURE PROVIDING NEW ELECTROCHEMICAL REACTION SITES, METHOD FOR PREPARING THE SAME, AND METHOD FOR IMPROVING CATHODE PERFORMANCE BY WETTABILITY CONTROL ON MOLTEN CARBONATE ELECTROLYTE FOR MOLTEN CARBONATE FUEL CELLS

摘要

By forming a structure wherein an oxygen ionic conductor or a mixed ionic-electronic conductor (MIEC) on a cathode surface is not covered by a molten carbonate electrolyte using an oxygen ionic conductor or a mixed ionic-electronic conductor having poor wettability on the molten carbonate electrolyte, a new electrochemical reaction site may be provided in addition to that provided by the molten carbonate electrolyte. As a result, cell performance, particularly cathode performance, can be improved even at low operation temperatures (e.g., 500-600° C.).

主权项

1. A cathode for a molten carbonate fuel cell,
wherein a first structure and a second structure are formed on the cathode, a surface of the second structure is exposed at least partly without being covered by a material of the first structure, the first structure comprises a molten carbonate electrolyte, the second structure comprises an oxygen ionic conductor, a mixed oxygen ionic-electronic conductor or a combination thereof, the first structure provides a first electrochemical reaction site, and the second structure whose surface is exposed at least partly without being covered by the first structure provides a second electrochemical reaction site which is different from the first electrochemical reaction site provided by the first structure.