Patent application number | Description | Published |
20090088539 | ELECTROLYTE POLYMER FOR POLYMER ELECTROLYTE FUEL CELLS, PROCESS FOR ITS PRODUCTION AND MEMBRANE-ELECTRODE ASSEMBLY - To provide an electrolyte polymer for polymer electrolyte fuel cells, made of a perfluorinated polymer having sulfonic groups, characterized in that in a test of immersing 0.1 g of the polymer in 50 g of a fenton reagent solution containing 3% of an aqueous hydrogen peroxide solution and 200 ppm of bivalent iron ions at 40° C. for 16 hours, the amount of eluted fluorine ions detected in the solution is not more than 0.002% of the total amount of fluorine in the polymer immersed. The electrolyte polymer of the present invention has very few unstable terminal groups and has an excellent durability, and therefore, is suitable as a polymer constituting an electrolyte membrane for polymer electrolyte fuel cells and a polymer contained in a catalyst layer. | 04-02-2009 |
20090215938 | PROCESS FOR PRODUCING ELECTROLYTE MATERIAL FOR POLYMER ELECTROLYTE FUEL CELLS, AND MEMBRANE-ELECTRODE ASSEMBLY FOR POLYMER ELECTROLYTE FUEL CELLS - A membrane-electrode assembly for polymer electrolyte fuel cells which is excellent in water repellency and gas diffusivity and which exhibits a high output power density, can be obtained by using, as an electrolyte material for polymer electrolyte fuel cells, a fluoropolymer obtained by contacting a fluoropolymer which is excellent in gas diffusivity and which has alicyclic structures in its main chain and further has sulfonic acid groups, with fluorine gas for fluorination to increase water repellency and stabilize the molecule ends. The above fluoropolymer is preferably made of a copolymer comprising repeating units based on the following monomer A and repeating units based on the following monomer B (wherein Y is a fluorine atom or a trifluoromethyl group, m is an integer of from 0 to 3, p is 0 or 1, and n is an integer of from 1 to 12):
| 08-27-2009 |
20090288290 | POLYMER ELECTROLYTE FUEL CELL, ELECTROLYTE MATERIAL THEREFORE AND METHOD FOR ITS PRODUCTION - An electrolyte material for a polymer electrolyte fuel cell, which is made of a copolymer comprising repeating units based on CF | 11-26-2009 |
20110091791 | ELECTROLYTE POLYMER FOR POLYMER ELECTROLYTE FUEL CELLS, PROCESS FOR ITS PRODUCTION AND MEMBRANE-ELECTRODE ASSEMBLY - To provide an electrolyte polymer for polymer electrolyte fuel cells, made of a perfluorinated polymer having sulfonic groups, characterized in that in a test of immersing 0.1 g of the polymer in 50 g of a fenton reagent solution containing 3% of an aqueous hydrogen peroxide solution and 200 ppm of bivalent iron ions at 40° C. for 16 hours, the amount of eluted fluorine ions detected in the solution is not more than 0.002% of the total amount of fluorine in the polymer immersed. The electrolyte polymer of the present invention has very few unstable terminal groups and has an excellent durability, and therefore, is suitable as a polymer constituting an electrolyte membrane for polymer electrolyte fuel cells and a polymer contained in a catalyst layer. | 04-21-2011 |
Patent application number | Description | Published |
20110008710 | MATERIAL FOR CATALYST LAYER FOR POLYMER ELECTROLYTE FUEL CELL - To improve the utilization efficiency of a noble metal catalyst in a catalyst layer of an electrode for a polymer electrolyte fuel cell. | 01-13-2011 |
20110071272 | FLUOROSULFONYL GROUP-CONTAINING MONOMER AND ITS POLYMER, AND SULFONIC ACID GROUP-CONTAINING POLYMER - A fluorosulfonyl group-containing monomer having a high polymerization reactivity and plural fluorosulfonyl groups, a fluorosulfonyl group-containing polymer and a sulfonic acid group-containing polymer, obtained by using the monomer. | 03-24-2011 |
20130345443 | FLUOROSULFONYL GROUP-CONTAINING MONOMER AND ITS POLYMER, AND SULFONIC ACID GROUP-CONTAINING POLYMER - A fluorosulfonyl group-containing monomer having a high polymerization reactivity and plural fluorosulfonyl groups, a fluorosulfonyl group-containing polymer and a sulfonic acid group-containing polymer, obtained by using the monomer. | 12-26-2013 |
20140179948 | METHOD FOR PRODUCING ORGANIC COMPOUND HAVING SULFO GROUP, METHOD FOR PRODUCING LIQUID COMPOSITION, AND METHOD FOR HYDROLYZING ORGANIC COMPOUND HAVING FLUOROSULFONYL GROUP - To provide a method for producing an organic compound having a sulfo group by efficiently hydrolyzing an organic compound having a fluorosulfonyl group with a small number of steps with a small quantity of waste liquid. | 06-26-2014 |
20150030962 | ELECTROLYTE MATERIAL, LIQUID COMPOSITION AND MEMBRANE/ELECTRODE ASSEMBLY FOR POLYMER ELECTROLYTE FUEL CELL - To provide a membrane/electrode assembly excellent in the power generation characteristics even under low or no humidity conditions or under high humidity conditions, and an electrolyte material suitable for a catalyst layer of the membrane/electrode assembly. | 01-29-2015 |
Patent application number | Description | Published |
20090048424 | FLUOROSULFONYL GROUP-CONTAINING MONOMER AND ITS POLYMER, AND SULFONIC ACID GROUP-CONTAINING POLYMER - To provide a fluorosulfonyl group-containing monomer having a high polymerization reactivity and plural fluorosulfonyl groups. Further, to provide a fluorosulfonyl group-containing polymer and a sulfonic acid group-containing polymer, obtained by using the monomer. | 02-19-2009 |
20090110967 | ELECTROLYTE MEMBRANE FOR POLYMER ELECTROLYTE FUEL CELL, PROCESS FOR ITS PRODUCTION, MEMBRANE/ELECTRODE ASSEMBLY FOR POLYMER ELECTROLYTE FUEL CELL AND METHOD OF OPERATING POLYMER ELECTROLYTE FUEL CELL - An electrolyte membrane for a polymer electrolyte fuel cell, which comprises an ion exchange membrane made of a fluoropolymer having a softening temperature of at least 90° C. and having acidic groups, and contains cerium atoms. | 04-30-2009 |
20090187044 | FLUOROSULFONYL GROUP-CONTAINING COMPOUND, METHOD FOR ITS PRODUCTION AND POLYMER THEREOF - A compound containing two fluorosulfonyl groups which are groups convertible to sulfonic acid groups, an intermediate therefor, and methods for their production with high productivity, are provided. Also provided are a fluorosulfonyl group-containing polymer obtained by polymerizing such a compound, and a sulfonic acid group-containing polymer obtained from such a polymer. | 07-23-2009 |
20100304271 | ELECTROLYTE MATERIAL, LIQUID COMPOSITION AND MEMBRANE/ELECTRODE ASSEMBLY FOR POLYMER ELECTROLYTE FUEL CELL - It is to provide an electrolyte material with which an increase in the water content can be suppressed even when the ion exchange capacity of a polymer having repeating units based on a monomer having a dioxolane ring is high; and a membrane/electrode assembly excellent in the power generation characteristics under low or no humidity conditions and under high humidity conditions. | 12-02-2010 |
20110027677 | FUEL CELL SYSTEM - To provide a fuel cell system provided with a polymer electrolyte fuel cell which is excellent in the power generation characteristics under high temperature and low or no humidity conditions. | 02-03-2011 |
20110027687 | ELECTROLYTE MATERIAL, LIQUID COMPOSITION AND MEMBRANE/ELECTRODE ASSEMBLY FOR POLYMER ELECTROLYTE FUEL CELL - It is to provide a membrane/electrode assembly excellent in the power generation characteristics under low or no humidity conditions and under high humidity conditions; and an electrolyte material having a low water content, suitable for a catalyst layer of a membrane/electrode assembly. | 02-03-2011 |
20110027688 | ELECTROLYTE MATERIAL, LIQUID COMPOSITION AND MEMBRANE/ELECTRODE ASSEMBLY FOR POLYMER ELECTROLYTE FUEL CELL - It is to provide a membrane/electrode assembly excellent in the power generation characteristics under low or no humidity conditions and under high humidity conditions, and an electrolyte material suitable for a catalyst layer of the membrane/electrode assembly. | 02-03-2011 |