Abstract:
Provided are a molded article of a polymer electrolyte composition, which has an excellent proton conductivity even under low humidity and low temperature conditions, yet shows a high chemical stability, a good mechanical strength and a good fuel shutoff ability, and, when used in a solid polymer type fuel cell, can achieve a high output, a high energy density and a long-term durability, and a solid polymer type fuel cell using the same. The molded article of the polymer electrolyte composition, which comprises a block copolymer having one or more ionic group-containing hydrophilic segments (A1) and one or more ionic group-free hydrophobic segments (A2) together with an additive, is characterized in that the molded article forms a co-continuous or lamellar phase separation structure and the additive has a hydrophilic nature.
Abstract:
Provided are: a block copolymer that exhibits excellent proton conductivity even in low-humidification conditions, exhibits excellent mechanical strength and chemical stability, and when used in a solid-polymer fuel cell, allows high output and excellent physical durability; a polymer electrolyte material; and a molded polymer electrolyte and solid-polymer fuel cell using same. This block polymer contains at least one of each of the following: a segment (A1) containing an ionic group; a segment (A2) that does not contain an ionic group; and a linker moiety connecting said segments. This block polymer is characterized in that the segment (A1) containing an ionic group contains a constitutional unit represented by a specific structure. This polymer electrolyte material, molded polymer electrolyte, and solid-polymer fuel cell are characterized by the use of this block copolymer.
Abstract:
[Problem] To provide: a polymer electrolyte composition that has excellent chemical stability that makes it possible to withstand a strong oxidizing atmosphere during fuel cell operation, that makes it possible to achieve excellent protonic conductivity under low humidity conditions, excellent mechanical strength, and excellent physical durability, and that is highly practical; and a polymer electrolyte membrane, a membrane-electrode assembly, and a solid polymer fuel cell that use the polymer electrolyte composition. [Solution] A polymer electrolyte composition that comprises at least an ionic group-containing polymer (A), an organic phosphorus-based additive (C), and a nitrogen-containing heteroaromatic ring system additive (D) and that is characterized by the nitrogen-containing heteroaromatic ring system additive (D) comprising at least three nitrogen-containing heteroaromatic rings within a molecule thereof. In addition, the polymer electrolyte membrane, the catalyst layer-equipped electrolyte membrane, the membrane-electrode assembly, and the solid polymer fuel cell of the present invention are characterized by being configured using the polymer electrolyte composition.
Abstract:
Provided are: a practically excellent polymer electrolyte composition having excellent chemical stability of being resistant to strong oxidizing atmosphere during operation of fuel cell, and achieving excellent proton conductivity under low-humidification conditions, excellent mechanical strength and physical durability; a polymer electrolyte membrane, a membrane electrode assembly, and a polymer electrolyte fuel cell each using the same. The polymer electrolyte composition of the present invention comprises at least an ionic group-containing polymer (A) and a phosphorus-containing additive (B), the phosphorus-containing additive (B) being at least one of a phosphine compound and a phosphinite compound. The polymer electrolyte membrane, the membrane electrode assembly, and the polymer electrolyte fuel cell of the present invention are structured by the polymer electrolyte composition.
Title translation:POLYMERELEKTROLYTZUAMMENSETZUNG,POLYMERELEKTROLYTMEMBRAN DAMIT,MIT KATALYSATORSCHICHT BESCHICHTETE ELEKTROLYTMEMBRAN,MEMBRANELEKTRODENANORDNUNG UND FESTSTOFFPOLYMERBRENNSTOFFZELLE
Abstract:
he present invention provides: a polymer electrolyte composition which can achieve excellent proton conductivity under slightly humidified conditions, excellent mechanical strength and excellent physical durability, has excellent practicality, and can be produced using a nitrogen-containing additive, wherein the nitrogen-containing additive can prevent the elution of the additive under a strongly acidic atmosphere during the operation of a fuel cell, has excellent chemical stability so as to tolerate a strongly acidic atmosphere, can be dissolved in various general-purpose organic solvents, has superior processability, can be mixed with an ionic-group-containing polymer, can prevent the occurrence of phase separation during the formation of a film, and can prevent the formation of an island-in-sea-like phase separation structure or the occurrence of bleeding out during the formation of a film; and a polymer electrolyte membrane, a membrane electrode assembly and a polymer electrolyte fuel cell, each of which is produced using the polymer electrolyte composition. The polymer electrolyte composition according to the present invention comprises at least an ionic-group-containing polymer (A) and a nitrogen-containing additive (B), said polymer electrolyte composition being characterized in that the nitrogen-containing additive (B) is represented by a specific structural formula.
Abstract:
[Summary] To provide a formed article of polymer electrolyte composition which exhibits excellent proton conductivity even under low-humidification conditions and under low-temperature conditions, which is excellent in chemical stability, mechanical strength, fuel shutoff properties, and which can achieve high output, high energy density, and excellent long-term durability when used in a polymer electrolyte fuel cell; and also to provide a polymer electrolyte fuel cell using thereof. The formed article of polymer electrolyte composition includes: a block copolymer having one or more of each of a hydrophilic segment (A1) containing an ionic group and a hydrophobic segment (A2) not containing an ionic group; and an additive, wherein the formed article forms co-continuous or lamellar phase separation structure, and the additive is hydrophilic.