Patent application number | Description | Published |
20090278083 | POLYELECTROLYTE MEMBRANES COMPRISED OF BLENDS OF PFSA AND SULFONATED PFCB POLYMERS - A polymer blend useful as an ion conductor in fuel cells includes a first polymer having a cyclobutyl moiety and a second polymer include a sulfonic acid group. | 11-12-2009 |
20090280383 | BLENDED PEM'S WITH ELASTOMERS FOR IMPROVED MECHANICAL DURABILITY - A blend composition comprises a fluorine-containing polymer electrolyte and a fluoro-rubber. An electrolyte membrane may be prepared from the blend composition. The electrolyte membrane may be used in electrochemical cells such as electrolyzers, batteries and fuel cells. | 11-12-2009 |
20090281245 | NOVEL PROTON EXCHANGE MEMBRANES FOR FUEL CELL APPLICATIONS - A proton conductive graft polymer comprises at least a structure unit of a sulfonated polymer side chain covalently attached to a hydrophobic perfluorocyclobutane polymer main chain. The sulfonated condensation polymer side chain has a high local ion exchange capacity while the main polymer chain is substantially free of sulfonic acid group. A membrane made from the graft polymer can provide good mechanical properties and high proton conductivity at wide range of humidity and temperatures. | 11-12-2009 |
20090281270 | SULFONATED-POLYPERFLUORO-CYCLOBUTANE-POLYPHENLENE POLYMERS FOR PEM FUEL CELL APPLICATIONS - A polymer for ion conductor applications includes a polymer segment having a perfluorocyclobutyl moiety and a polymer segment not having such a moiety. One of these polymer segments is sulfonated to improve ionic conductivity. Fuel cells incorporating the ion conducting polymers are provided. | 11-12-2009 |
20100044616 | BLENDS OF LOW EQUIVALENT MOLECULAR WEIGHT PFSA IONOMERS WITH KYNAR 2751 - A polymer blend useful as an ion conductor in fuel cells includes a first polymer that includes a non-ionic segment and a second polymer that includes a sulfonic acid group. | 02-25-2010 |
20100047657 | GRADIENT REINFORCED PROTON EXCHANGE MEMBRANE - An ion conducting polymeric structure suitable for fuel cell applications is provided. The polymeric structure comprises a non-homogenous polymeric layer. The non-homogeneous layer is a blend of a first polymer comprising cyclobutyl moiety; and a second polymer having a non-ionic polymer segment. The weight ratio of the first polymer to the second polymer varies as a function of position within the non-homogenous layer. The blend composition may be cast into an electrolyte membrane that can be used to prepare electrochemical cells such as batteries and fuel cells. | 02-25-2010 |
20110053035 | Sodium Stannate Additive to Improve the Durability of PEMS for H2/Air Fuel Cells - An ion conducting membrane for fuel cell applications includes an ion conducting polymer and a tin-containing compound at least partially dispersed within the ion conducting polymer. The ion conducting membranes exhibit improved performance over membranes not incorporating such tin-containing compounds. | 03-03-2011 |
20110053036 | Polyelectrolyte Membranes Made Of Poly(Perfluorocyclobutanes) With Pendant Perfluorosulfonic Acid Groups and Blends With Poly(Vinylidene Fluoride) - A polymer useful as an ion conductor in fuel cells includes a perfluorocyclobutyl moiety and pendant PFSA side groups. The polymer is made by a variation of the Ullmann reaction. Ion conducting membranes incorporating the polymer are provided. | 03-03-2011 |
20110053038 | CO(II)TETRAMETHOXYPHENYLPORPHYRIN ADDITIVE TO PFSA PEMS FOR IMPROVED FUEL CELL DURABILITY - An ion conducting membrane for fuel cell applications includes an ion conducting polymer and a porphyrin-containing compound at least partially dispersed within the ion conducting polymer. The ion conducting membranes exhibit improved performance over membranes not incorporating such porphyrin-containing compounds. | 03-03-2011 |
20110054050 | ION EXCHANGE MEMBRANE HAVING LAMELLAR MORPHOLOGY AND PROCESS OF MAKING THE SAME - An ion exchange membrane is prepared from a block copolymer comprising a hydrophobic polymer segment and a polar polymer segment. The ion exchange membrane is formed by placing a film layer in steam, water or an electric field at a temperature greater than about 40° C. for sufficient amount of time to develop a bicontinuous morphology. The ion exchange membrane is also formed from a film layer comprising a block copolymer and a solvent. The film layer is placed in an electric field at an elevated temperature and dried therein. The film layer is thereby converted into an ion exchange membrane with bicontinuous morphology. The ion exchange membrane prepared according to these processes exhibits improved mechanical and electrochemical properties. | 03-03-2011 |
20110159404 | Polyolefin Support to Prevent Dielectric Breakdown in PEMS - A fuel cell includes a first catalyst layer and a second catalyst layer. An ion conducting membrane is interposed between the first and second catalyst layers. The ion conducting layer includes a polyolefin support structure and an ion conducting polymer at least partially penetrating the polyolefin support structure. A set of electrically conducting flow field plates are in communication with the first and second catalyst layers. | 06-30-2011 |
20110159405 | Hydrophilic Polyelectrolyte Membranes Containing Poly(Vinyl Acetate) and Poly(Vinyl Alcohol) - An ion conducting membrane for fuel cell applications includes a combination of a polyvinyl polymer and an ion conducting polymer that is different than the polyvinyl polymer. The ion conducting membrane of this embodiment is able to operate in fuel cells at elevated temperatures with minimal external humidification. A fuel cell incorporating the ion conducting membrane between a first and second catalyst layer is also provided. | 06-30-2011 |