Disclosed are a polymer electrolyte membrane for a fuel cell, a membrane-electrode assembly including the same, a fuel cell and a method of manufacturing the polymer electrolyte membrane for a fuel cell. Particularly, the polymer electrolyte membrane for a fuel cell may include ionomer layers including a voltage reversal tolerance-increasing additive including a water electrolysis catalyst and an electrical conductor and provided on a porous reinforced film.

Disclosed are a polymer electrolyte membrane for a fuel cell, a membrane-electrode assembly including the same, a fuel cell and a method of manufacturing the polymer electrolyte membrane for a fuel cell. Particularly, the polymer electrolyte membrane for a fuel cell may include ionomer layers including a voltage reversal tolerance-increasing additive including a water electrolysis catalyst and an electrical conductor and provided on a porous reinforced film.

Disclosed are a polymer electrolyte membrane for fuel cells which has improved handling properties and mechanical strength by employing symmetric-type laminated composite films and a method for manufacturing the same.

Disclosed are a polymer electrolyte membrane for fuel cells which has improved handling properties and mechanical strength by employing symmetric-type laminated composite films and a method for manufacturing the same.

A proton exchange membrane fuel cell includes an anode catalyst layer, a cathode catalyst layer, a proton exchange membrane separating the anode catalyst layer from the cathode catalyst layer, an oxygen inlet configured to supply oxygen to the cathode catalyst layer, and a hydrogen inlet separate from the oxygen inlet and configured to supply hydrogen to the anode catalyst layer. The fuel cell is operable to convert the hydrogen from the hydrogen inlet to hydrogen ions at the anode catalyst layer and to produce an H2O byproduct at the cathode catalyst layer where the oxygen reacts with the hydrogen ions. The fuel cell includes a water outlet for the H2O byproduct that is separate from the oxygen inlet.

An anion exchange polymer includes aryl ether linkage free polyarylenes having aromatic/polyaromatic rings in polymer backbone and a tethered alkyl quaternary ammonium hydroxide side groups. This anion exchange polymer may be utilized in an anion exchange process and may be made into a thin anion transfer membrane. An ion transfer membrane may be mechanically reinforced having one or more layers of functional polymer based on a terphenyl backbone with quaternary ammonium functional groups and an inert porous scaffold material for reinforcement. An anion exchange membrane may have multilayers of anion exchange polymers which each containing varying types of backbones, varying degrees of functionalization, or varying functional groups to reduce ammonia crossover through the membrane.

An anion exchange polymer includes aryl ether linkage free polyarylenes having aromatic/polyaromatic rings in polymer backbone and a tethered alkyl quaternary ammonium hydroxide side groups. This anion exchange polymer may be utilized in an anion exchange process and may be made into a thin anion transfer membrane. An ion transfer membrane may be mechanically reinforced having one or more layers of functional polymer based on a terphenyl backbone with quaternary ammonium functional groups and an inert porous scaffold material for reinforcement. An anion exchange membrane may have multilayers of anion exchange polymers which each containing varying types of backbones, varying degrees of functionalization, or varying functional groups to reduce ammonia crossover through the membrane.

Disclosed are: a polymer electrolyte membrane which can guarantee the production of a membrane-electrode assembly having excellent mechanical properties without a decrease in performance, such as in ionic conductivity, and thus having a high enough durability to achieve at least 30,000 wet/dry cycles as measured according to the NEDO protocol; a membrane-electrode assembly including the polymer electrolyte membrane; and a method for measuring the durability of the membrane-electrode assembly. The polymer electrolyte membrane according to the present invention comprises a composite layer including: a porous support having multiple pores; and ionomers filling the pores, and has an MD internal tearing strength of 150 N/mm or greater, a TD internal tearing strength of 150 N/mm or greater, a stab initial strain of 8% or less, and a stab final strain of 10% or less.

The present disclosure relates to a membrane-electrode assembly for fuel cells and a method of manufacturing the same, and more particularly to a membrane-electrode assembly to which an electrolyte membrane including a cerium oxide and phosphoric acid functionalized graphene oxide is applied, whereby chemical durability and proton conductivity of the membrane-electrode assembly are improved.

Systems, methods, and membranes involving ion exchange membranes are disclosed. In an embodiment of the present invention, an ultrathin laminar layer made of inorganic nanosheets may be coated on one side or both sides of a polymeric anion exchange membrane (AEM), forming a composite AEM. Oxidation stability measurements may indicate that composite AEM provide superior oxidation resistance to exemplary polymeric AEMs and to commercial polymeric AEMs.