Patent application number | Description | Published |
20090202883 | Catalyst-Polymer Liquid Dispersion For Fuel Cell Applications - Catalyst-polymer liquid dispersion (LD) comprising (i) catalyst particles, (ii) polymer particles consisting of at least one (per)fluoro sulfonyl fluoride polymer in the —SO | 08-13-2009 |
20090258273 | ASSEMBLIES FOR ELECTROCHEMICAL DEVICES - MEA 7-layer assemblies with gasket, comprising:
| 10-15-2009 |
20100040912 | Process for operating a fuel cell in dry conditions - The invention pertains to a process for operating a polymer electrolyte membrane fuel cell (PEMFC), said PEMFC comprising:
| 02-18-2010 |
20100087553 | Process for stabilizing fluoropolymer having ion exchange groups - The invention pertains to a process for stabilizing a semi-crystalline fluoropolymer comprising ion exchange groups, said process comprising:
| 04-08-2010 |
20100297523 | Fluoroionomer liquid composition - A liquid composition comprising:
| 11-25-2010 |
20110052798 | CCM COMPOSITE - CCM formed of a membrane having on one of the two surfaces a first electrocatalytic layer containing a catalyst and on the other one a second electrocatalytic layer containing a catalyst, said electrocatalytic layers and said membrane containing (per)fluorinated ionomers, said CCM having the following characteristics:
| 03-03-2011 |
20110240559 | Purification of fluoroionomer compositions - A process for the purification from ionic impurities of a fluoroionomer liquid composition, comprising: providing a liquid composition comprising at least one fluoroionomer (I-1) in a liquid medium, the liquid composition comprising ionic impurities; contacting the liquid composition with a solid particulate comprising at least one fluoroionomer (I-2) having ion exchange groups, wherein H | 10-06-2011 |
20120076990 | Fluoroionomers dispersions having a low surface tension, low liquid viscosity and high solid content - The invention pertains to a process for manufacturing certain (per)fluoroionomer liquid compositions, comprising, inter alia, at least one of fluorination and treatment with a polar solvent, to the liquid compositions therefrom having an improved solids content/surface tension/liquid viscosity compromise, to the use of the same for manufacturing composite membranes and to composite membranes obtainable therefrom. | 03-29-2012 |
20120289616 | PROCESS FOR STABILIZING FLUOROPOLYMER HAVING ION EXCHANGE GROUPS - The invention pertains to a process for stabilizing a semi-crystalline fluoropolymer comprising ion exchange groups, said process comprising: suspending at least one semi-crystalline fluoropolymer having ion exchange groups [polymer (I)] in at least one fluorinated organic dispersing medium [medium (M)] so as to obtain a dispersion (D) of polymer (I) in a dispersing medium (M); contacting said dispersion (D) with fluorine under irradiation with U. V. radiation so as to obtain a stabilized polymer. Still objects of the invention are a stable semi-crystalline fluoropolymer as above defined having a low amount of unstable ends groups of —COF type, the use of the stabilized fluoropolymer obtained by the process or of the stable fluoropolymer in fuel cells devices, a membrane and a membrane-electrode assembly comprising said fluoropolymers. | 11-15-2012 |
20130211026 | Process for the treatment of sulfonyl fluoride polymers - A process for reducing the amount of soluble polymeric fractions in a sulfonyl fluoride polymer. The process comprises contacting the sulfonyl fluoride polymer with a fluorinated fluid followed by separation of the polymer from the fluid. The fluorinated fluid is selected from hydrofluoroethers and hydrofluoropolyethers. The invention further relates to sulfonyl fluoride polymers obtainable by the process and having a heat of fusion not exceeding 4 J/g and containing less than 15% by weight of polymeric fractions having an average content of monomeric units comprising a sulfonyl functional group exceeding 24 mole %. | 08-15-2013 |
20130244138 | Liquid compositions of fluorinated ion exchange polymers - A liquid composition comprising at least one aprotic organic solvent and at least one fluorinated ion exchange polymer which consists of recurring units derived from a chlorofluoroolefin of formula CF | 09-19-2013 |
20140017599 | PROCESS FOR THE PREPARATION OF CROSS-LINKED FLUORINATED POLYMERS - A process for the preparation of cross-linked fluorinated polymers comprising sulfonic acid functional groups comprising the steps of: a) providing at least one fluorinated polymer (P) comprising at least one —SO | 01-16-2014 |
20140315121 | METHOD FOR THE PREPARATION OF CATALYST-COATED MEMBRANES METHOD FOR THE PREPARATION OF CATALYST-COATED MEMBRANES - The present invention is directed to a method for preparing an integral 3-layer catalyst-coated membrane (CCM) for use in electrochemical cells, e.g. PEM (polymer-electrolyte membrane) fuel cells. The process comprising the steps of preparing a first catalyst layer on a supporting substrate, subsequently coating the first catalyst layer with an ionomer dispersion to form an ionomer layer (membrane), and applying a second catalyst layer on top of the ionomer layer. The ionomer dispersion applied in the membrane coating step has low viscosity in the range of 10 to 400 centipoises (cP) and an ionomer concentration in the range of 15 to 35 weight-%. With this method, CCMs with improved electrochemical performance and reduced cathode resistance are manufactured. | 10-23-2014 |