Polymer electrolyte and proton-conducting membrane
AssigneesHonda Motor Co., Ltd., Jsr Corporation
InventorsNagayuki Kanaoka, Masaru Iguchi, Naoki Mitsuta, Hiroshi Sohma, Toshihiro Ohtsuki
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Abstract
To provide a sulfonic acid group-containing polymer having improved hot water resistance and radical resistance (durability), a solid polymer electrolyte including the polymer, and a proton-conducting membrane including the electrolyte, the polymer electrolyte includes a sulfonated product of a polymer shown by the following general formula (I): wherein X, Y, and Z are bonded randomly, alternately, or in blocks, y represents an integer of two or more, and each of x and z represents an integer of zero or more, where x+z>2.
Claims11
A polymer electrolyte comprising a sulfonated product of a polymer shown by the following general formula (I):
- wherein X represents at least one structure selected from structures shown by the following formulas (X-1), (X-2), and (X-3), Y represents at least one structure selected from structures shown by the following formulas (Y-1) to (Y-12), Z represents at least one structure selected from structures shown by the following formulas (Z-1) and (Z-2), X, Y, and Z being bonded randomly, alternately, or in blocks, y represents an integer of two or more, and each of x and z represents an integer of zero or more, where x+z>2,
- wherein A represents an electron-withdrawing group, and B represents an electron-donating group,
- wherein A represents an electron-withdrawing group, Ar represents a divalent group including an aromatic ring, Ar′ represents a tetravalent group including an aromatic ring, R represents a hydrogen atom or a hydrocarbon group, W represents an electron-withdrawing group or an electron-donating group, p represents an integer of 0 to 4, and q represents an integer of 1 to 1000,
- wherein A represents an electron-withdrawing group, B represents an electron-donating group, and m represents an integer of 0 to 200.
A membrane electrode assembly comprising a pair of electrodes and an electrolyte membrane held between the electrodes, the electrodes and the electrolyte membrane being integrally bonded,
- wherein the electrolyte membrane comprises a polymer shown by the following general formula (I):
- wherein X represents at least one structure selected from structures shown by the following formulas (X-1), (X-2), and (X-3), Y represents at least one structure selected from structures shown by the following formulas (Y-1) to (Y-12), Z represents at least one structure selected from structures shown by the following formulas (Z-1) and (Z-2), X, Y, and Z being bonded randomly, alternately, or in blocks, y represents an integer of two or more, and each of x and z represents an integer of zero or more, where x+z>2,
- wherein A represents an electron-withdrawing group, and B represents an electron-donating group,
- wherein A represents an electron-withdrawing group, Ar represents a divalent group including an aromatic ring, Ar′ represents a tetravalent group including an aromatic ring, R represents a hydrogen atom or a hydrocarbon group, W represents an electron-withdrawing group or an electron-donating group, p represents an integer of 0 to 4, and q represents an integer of 1 to 1000,
- wherein A represents an electron-withdrawing group, B represents an electron-donating group, and m represents an integer of 0 to 200.
Dependencies are inferred from the claim text.