Method of recovering materials forming fuel cell stack

A method of recovering, from a fuel cell stack (100) having a stack structure including a plurality of fuel cells (10) stacked, materials forming the fuel cell stack (100),

• the fuel cells (10) each including a membrane electrode assembly (14) and two separators (15) holding the membrane electrode assembly (14) therebetween, the separators (15) each being provided with a gas flow channel (25) configured to supply a raw material gas to the membrane electrode assembly (14),
• the method comprising:
• a first step of supplying an aprotic solvent to the fuel cell stack (100) through the gas flow channel (25), collecting the aprotic solvent which contains a material, and recovering the material from the collected solvent, wherein the first step includes:
• supplying an oxidant and a reductant as reagents and an electrolytic solution as the aprotic solvent to the gas flow channel (25), collecting the electrolytic solution which contains a first portion of the material, and recovering the first portion of the material from the collected electrolytic solution;
• and
• supplying an alcohol solution as the solvent to the gas flow channel (25), collecting the alcohol solution which contains a second portion of the material, and recovering the second portion of the material from the collected alcohol solution;
• and
• a second step of subjecting the fuel cell stack (100) after the first step to a heat treatment to obtain a molten liquid and recovering a third portion of the material from the molten liquid,
• the materials recovered including materials forming the membrane electrode assembly (14) and the separators (15),
• the materials recovered further including an organic compound including a fluororesin forming the membrane electrode assembly (14).