Patents Assigned to PEMEAS GmbH
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Publication number: 20110318671Abstract: The present invention relates to a novel proton-conducting polymer membrane based on polyazoles which can, owing to its excellent chemical and thermal properties, be used for a variety of purposes and is particularly suitable as a polymer-electrolyte membrane (PEM) for the production of membrane electrode units for so-called PEM fuel cells.Type: ApplicationFiled: December 30, 2004Publication date: December 29, 2011Applicant: PEMEAS GmbHInventors: Oemer Uensal, Ursula Leister, Melanie Schlegel
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Patent number: 7846982Abstract: The present invention relates to a proton-conducting electrolyte membrane obtainable by a process comprising the steps: A) swelling a polymer film with a liquid comprising a vinyl-containing sulphonic acid and B) polymerising the vinyl-containing sulphonic acid present in liquid introduced in step A). A membrane according to the invention is very versatile on account of its excellent chemical and thermal properties and may be used, in particular, as a polymer electrolyte membrane (PEM) in what are known as PEM fuel cells.Type: GrantFiled: March 4, 2003Date of Patent: December 7, 2010Assignee: Pemeas GmbHInventors: Joachim Kiefer, Oemer Uensal, Gordon Calundann, James Crivello
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Publication number: 20100024957Abstract: Fixtures and methods of using fixtures to facilitate the fabrication of devices having thin films, for example, gasketed components of fuel-cell membrane electrode assemblies, are disclosed. In one aspect, the fixture comprises a plate having an aperture and means for mounting a thin film to the plate wherein the thin film at least partially obstructs the aperture and wherein the thin film provides a surface for mounting at least one component of a device. Another aspect is a fixture for facilitating the fabrication of a fuel-cell membrane electrode assembly which includes a plate having an aperture and means for mounting a gasket to the plate wherein the gasket at least partially obstructs the aperture and wherein the gasket provides a surface for mounting at least one electrode for a fuel-cell membrane electrode assembly.Type: ApplicationFiled: October 9, 2009Publication date: February 4, 2010Applicant: PEMEAS GmbHInventors: Raymond Puffer, Stephen Derby, Glenn Saunders, Glen Hoppes, Louise Courtois, Jürgen Pawlik, Werner Kraus
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Publication number: 20090214920Abstract: The present invention relates to a novel proton-conducting polymer membrane based on polyazoles which can, owing to its excellent chemical and thermal properties, be used for a variety of purposes and is particularly suitable as a polymer-electrolyte membrane (PEM) for the production of membrane electrode units for so-called PEM fuel cells.Type: ApplicationFiled: December 30, 2004Publication date: August 27, 2009Applicant: PEMEAS GmbHInventors: Oemer Uensal, Gunter Christ, Kathrin Wirth
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Publication number: 20090214921Abstract: The present invention relates to a novel proton-conducting polymer membrane based on polyazoles which can, owing to its excellent chemical and thermal properties, be used for a variety of purposes and is particularly suitable as a polymer-electrolyte membrane (PEM) for the production of membrane electrode units for so-called PEM fuel cells.Type: ApplicationFiled: December 30, 2004Publication date: August 27, 2009Applicant: PEMEAS GmbHInventors: Oemer Uensal, Kilian Brehl, Edmund Thiemer
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Publication number: 20080305946Abstract: The instant invention relates to a platinum alloy supported electrocatalyst for gas diffusion electrode and/or in catalyst-coated membrane.Type: ApplicationFiled: November 28, 2005Publication date: December 11, 2008Applicant: PEMEAS GMBHInventors: Lixin Cao, Yu-Min Tsou, Emory De Castro
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Publication number: 20080254342Abstract: A method for forming a patterned noble metal coating on a gas diffusion medium substantially free of ionomeric components comprising subjecting an electrically conductive web with a patterned mask overlaid thereto to a first ion beam having an energy not higher than 500 eV, and to a second beam having an energy of at least 500 eV, containing the ions of at least one noble metal and a gas diffusion electrode.Type: ApplicationFiled: April 13, 2006Publication date: October 16, 2008Applicant: PEMEAS GmbHInventors: Andrea Gulla, Robert Allen
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Publication number: 20080038623Abstract: The present invention relates to a membrane electrode unit comprising a polymer membrane doped with a mineral acid as well as two electrodes, characterized in that the polymer membrane comprises at least one polymer with at least one nitrogen atom and at least one electrode comprises a catalyst which is formed from at least one precious metal and at least one metal less precious according to the electrochemical series.Type: ApplicationFiled: February 20, 2005Publication date: February 14, 2008Applicant: Pemeas GmbHInventors: Thomas Schmidt, Oemer Uensal, Mathias Weber, Isabel Kundler, Gordon Calundann, Jochen Baurmeister
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Publication number: 20070248889Abstract: The invention relates to a membrane-electrode unit comprising two gas diffusion layers, each layer being in contact with a catalyst layer and said gas diffusion layers being separated by a polymer electrolyte membrane. A polymer frame is provided on at least one of the two surfaces of the polymer electrolyte membrane that are in contact with the catalyst layer. Said polymer frame comprises an inner region that lies on at least one surface of the polymer electrolyte membrane and an outer region that lies outside the gas diffusion layer. The thickness of all components of the outer region is between 50 and 100% of the thickness of all components of the inner region. The thickness of the outer region is reduced by a maximum 2% at a temperature of 80° C. and a pressure of 10 N/mm2 over a period of 5 hours, said reduction in thickness being determined after a first compression process, which is carried out at a pressure of 10 N/mm2 for 1 minute.Type: ApplicationFiled: July 21, 2005Publication date: October 25, 2007Applicant: PEMEAS GMBHInventors: Thomas Schmidt, Christoph Padberg, Glen Hoppes, Detlef Ott, Francis Rat, Marc Jantos
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Publication number: 20070202415Abstract: The present invention relates to a proton-conducting polymer membrane comprising polymers comprising at least one porous carrier material and polymers comprising phosphonic acid groups, obtainable by polymerizing monomers comprising phosphonic acid groups.Type: ApplicationFiled: September 4, 2004Publication date: August 30, 2007Applicant: PEMEAS GMBHInventors: Joachim Kiefer, Oemer Uensal
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Patent number: 7244811Abstract: The present invention relates to a process for the treatment of polyazole films, in which a film is passed at least twice through a trough filled with a liquid, with the film being unrolled from a spool and rolled up on a further spool and the direction of travel of the film is changed during the treatment by altering the direction of rotation of the spools.Type: GrantFiled: July 25, 2003Date of Patent: July 17, 2007Assignee: PEMEAS GmbHInventor: Joachim Petersen
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Patent number: 7235320Abstract: The present invention relates to a novel proton-conducting polymer membrane based on polyazoles which can, because of its excellent chemical and thermal properties, be used in a variety of ways and is particularly useful as polymer electrolyte membrane (PEM) to produce membrane electrode units for PEM fuel cells.Type: GrantFiled: April 9, 2002Date of Patent: June 26, 2007Assignee: PEMEAS GmbHInventors: Gordon Calundann, Michael J. Sansone, Oemer Uensal, Joachim Kiefer
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Patent number: 7229553Abstract: Method for producing a membrane made of bridged polymer and a fuel cell. The present invention relates to a membrane comprising a bridged polymer which is produced by a selected process. The membrane of the invention displays a significantly improved fracture toughness (elongation at break/tensile strength) with virtually unchanged swelling behavior. The membranes of the invention are suitable for producing membrane-electrode units for fuel cells.Type: GrantFiled: March 1, 2002Date of Patent: June 12, 2007Assignee: PEMEAS GmbHInventors: Oemer Uensal, Joachim Kiefer
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Publication number: 20070055045Abstract: Proton-conducting polymer membrane containing polymers with sulfonic acid groups that are covalently bonded to aromatic groups, membrane-electrode unit, and use thereof in fuel cells The present invention relates to a proton-conducting polymer membrane comprising polymers with sulfonic acid groups bonded covalently to aromatic groups and polymers comprising phosphonic acid groups, obtainable by polymerizing monomers comprising phosphonic acid groups.Type: ApplicationFiled: September 4, 2004Publication date: March 8, 2007Applicant: PEMEAS GMBHInventors: Joachi Kiefer, Oemer Uensal
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Publication number: 20060079392Abstract: The present invention relates to a proton-conducting polymer membrane which comprises polyazoles and is coated with a catalyst layer and is obtainable by a process comprising the steps A) preparation of a mixture comprising polyphosphoric acid, at least one polyazole (polymer A) and/or one or more compounds which are suitable for forming polyazoles under the action of heat according to step B), B) heating of the mixture obtainable according to step A) under inert gas to temperatures of up to 400° C., C) application of a layer using the mixture obtained according to step A) and/or B) to a support, D) treatment of the membrane formed in step C) until it is self-supporting, E) application of at least one catalyst-containing coating to the membrane formed in step C) and/or in step D).Type: ApplicationFiled: October 2, 2003Publication date: April 13, 2006Applicant: PEMEAS GMBHInventors: Jochen Baurmeister, Isabel Kundler, Christoph Padberg, Oemer Uensal, Joachim Kiefer, Gordon Calundann, Brian Benicewicz, Mathias Weber
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Proton-conducting polymer membrane containing polyazole blends and application thereof in fuel cells
Publication number: 20060078774Abstract: The present invention relates to a proton-conducting polymer membrane which comprises polyazole blends and is obtainable by a process comprising the steps A) preparation of a mixture comprising polyphosphoric acid, at least one polyazole (polymer A) and/or one or more compounds which are suitable for forming polyazoles under the action of heat according to step B), B) heating of the mixture obtainable according to step A) under inert gas to temperatures of up to 400° C., C) application of a layer using the mixture from step A) and/or B) to a support, D) treatment of the membrane formed in step C) until it is self-supporting, wherein at least one further polymer (polymer B) which is not a polyazole is added to the composition obtainable according to step A) and/or step B) and the weight ratio of polyazole to polymer B is in the range from 0.1 to 50.Type: ApplicationFiled: October 2, 2003Publication date: April 13, 2006Applicant: PEMEAS GMBHInventors: Oemer Uensal, Joachim Kiefer, Gordon Calundann, Michael Sansone, Brian Benicewicz, Eui Choe -
Publication number: 20060035095Abstract: The present invention relates to novel polyazoles, a proton-conducting polymer membrane based on these polyazoles and its use as polymer electrolyte membrane (PEM) for producing membrane-electrode units for PEM-fuel cells, and also other shaped bodies comprising such polyazoles.Type: ApplicationFiled: August 20, 2003Publication date: February 16, 2006Applicant: PEMEAS GMBHInventors: Gordon Calundann, Brian Benicewicz, Jochen Baurmeister
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Patent number: 6998464Abstract: The present invention relates to a method of preparing a solution of a polymer comprising recurring azole units, which comprises dissolving a sufficiently dried polymer comprising recurring azole units of the formula where the radicals Ar, Ar1 and Ar2 are tetravalent, divalent or trivalent aromatic or heteroaromatic groups and the radicals X, which are identical within a repeating unit, are each an oxygen atom, a sulfur atom or an amino group bearing a hydrogen atom, a group having 1–20 carbon atoms, preferably a branched or unbranched alkyl or alkoxy group, or an aryl group as further radical, in N,N-dimethylacetamide having a sufficiently low water content at a temperature above room temperature under an inert gas atmosphere, wherein a sufficiently dried polymer comprising recurring azole units of the formula (1) or (2) of which 90% by weight based on the total weight of the polymer comprising recurring azole units has a particle size of less than 1 mm is used.Type: GrantFiled: October 20, 2001Date of Patent: February 14, 2006Assignee: PEMEAS GmbHInventors: Thomas Guth, Jürgen Pawlik, Reiner Tiefenstädter, Peter Brendel, Frauke Jordt
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Patent number: 6994788Abstract: A sulfonated aromatic polymer comprising the repeating structural unit of the formula I —O—Ar1(SO3R)n—C(CF3)2—Ar1(SO3R)n—O—Ar2—(X—Ar2)m—, ??(I) in which Ar1 and Ar2 are, independently of one another, divalent aromatic or heteroaromatic radicals which are optionally substituted by one or more monovalent organic groups which are inert under the conditions of use, R is hydrogen, an alkali metal or alkaline earth metal ion or an ammonium ion, n is an integer from 0 to 3, m is 0, 1 or 2 and X is a —CO—, —O—, —CpH2p—, —CpF2p— or —S— group, in which p is an integer from 1 to 10, is described. Membranes with high proton conductivities can be produced from this polymer and are preferably used in fuel cells.Type: GrantFiled: March 1, 2000Date of Patent: February 7, 2006Assignee: PEMEAS GmbHInventors: Alexander Dyck, Thomas Soczka-Guth
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Publication number: 20060022081Abstract: A cartridge and a method for handling thin film membranes using a cartridge are disclosed. The cartridge may be used to handle any thin-film material, but is particularly useful in handling the thin membrane materials used in fabricating Membrane Electrode Assemblies (MEA) for fuel cells. In one aspect, the cartridge includes cavities positioned at opposite ends of a frame. The cavities and associated mounting arrangements are adapted to accept spools for dispensing membrane material and drawing it across the frame. The cartridge also includes a removable cover having an aperture through which the membrane material may be accessed and, for example, cut to a desired shape. Aspects also include methods and apparatus for advancing the membrane in the cartridge. Aspects of the present invention provide improved methods and devices that facilitate the handling and assembly of thin film membranes into membrane-containing devices, such as, fuel cells.Type: ApplicationFiled: July 30, 2004Publication date: February 2, 2006Applicant: Pemeas GmbHInventor: Raymond Puffer