Electrolyte: A substance, in this case, high-temperature molten carbonate salts, that conducts electricity when dissolved or melted. It allows ions to move between the anode and cathode in a fuel cell.
Anode: The electrode where oxidation occurs in a fuel cell or battery. In molten carbonate fuel cells, it is typically made of porous nickel material and serves as the site for the electrochemical reaction with the fuel.
Cathode:The electrode where reduction occurs in a fuel cell or battery. In molten carbonate fuel cells, it is usually made of porous ceramic material and facilitates the electrochemical reaction with oxygen or air.