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7615300 |
Development of novel proton-conductive polymers for proton exchange membrane fuel cell (PEMFC) technology
New thermally and chemically stable sulfonic acid-containing polymers are synthesized via post-sulfonation of aromatic polymers. These new polymers provide unique benefits to proton exchange...
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7601785 |
Sulphonated multiblock copolymer and electrolyte membrane using the same
Disclosed is a sulfonated multiblock copolymer, which comprises a hydrophilic block (X) having a repeating unit represented by the following formula 1a, and a hydrophobic block (Y) having a...
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7601759 |
Water insoluble additive for improving conductivity of an ion exchange membrane
A water insoluble additive for improving the performance of an ion-exchange membrane, such as in the context of the high temperature operation of electrochemical fuel cells. The insoluble additive...
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7598296 |
Preparation method of polyamide thin film composite reverse osmosis membrane and polyamide thin film composite reverse osmosis membrane prepared therefrom
A preparation method of a polyamide thin film composite reverse osmosis membrane and a polyamide thin film composite reverse osmosis membrane prepared using the preparation method are provided. The...
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7597980 |
Sulfonic acid group-containing, proton-conducting polymer composition, a solid electrolyte membrane and a solid polymer fuel cell
A solid electrolyte membrane for solid polymer fuel cells, or the like is provided that is chemically stable in a strong acid atmosphere, and has low methanol cross-over as well as high proton...
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7592375 |
Ion conductive polymers and imide monomers
Disclosed herein is an ion conductive polymer comprising a unit represented by Formula (1) below:
—SO 2 [N − SO 2 (M + )] X1 - ...
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7588850 |
Polymer membrane for a fuel cell, a method of preparing the same, and a membrane-electrode assembly fuel cell system comprising the same
A polymer electrolyte membrane for a fuel cell, a method of preparing the same, and a fuel cell system comprising the same. The polymer electrolyte membrane includes a metal-bound inorganic...
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7582713 |
Ion exchange polymer dispersion, process for its production and its use
A thickened ion exchange polymer dispersion is obtained by applying ultrasonic vibration or a shearing force to an ion exchange polymer dispersion having a fluorinated polymer having sulfonic acid...
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7582683 |
Anion-conducting polymer, composition, and membrane
Anion-conducing polymers and membranes with enhanced stability to aqueous alkali include a polymer backbone with attached sulfonium, phosphazenium, phosphazene, and guanidinium residues....
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7582210 |
Proton-conducting membrane and use thereof
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...
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7569616 |
Electrolyte membrane, process for its production and membrane-electrode assembly for polymer electrolyte fuel cells
Provided is an electrolyte membrane and a process of producing the same, wherein the electrolyte membrane predominantly comprises an unreinforced outer layer on one or each side of a reinforced...
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7563532 |
Trifluorostyrene containing compounds, and their use in polymer electrolyte membranes
A fluorinated ion exchange polymer is prepared by grafting a monomer onto a base polymer, wherein the grafting monomer is selected from the group consisting of structure 1a, 1b and mixture thereof;...
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7560497 |
Perfluorocarbon ionomer membrane with high proton conductivity and preparation thereof
The present invention provides a perfluorocarbon ionomer membrane with aligned fibril-like nanostructures and its preparation method.
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7560185 |
Solid polymer electrolyte, a membrane using thereof, a solution for coating electrode catalyst, a membrane/electrode assembly, and a fuel cell
A solid polymer electrolyte is made up of a polymer compound having a hydrocarbon aromatic group in the backbone thereof and including a side chain expressed by FORMULA 1:
wherein “n” is 1,...
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7556876 |
Polybenzimidazole-benzamide copolymer, process for preparing the same, electrolyte membrane prepared therefrom and process for preparing the same
The present invention relates to a novel polybenzimidazole-benzamide copolymer composed of the repeating units represented by formula 1 which is applicable to the electrolyte membrane of fuel cell...
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7547733 |
Composite proton exchange membrane
An organic/inorganic composite proton exchange membrane (PEM) is disclosed. The PEM includes a proton exchange membrane and a particulate inorganic conductor filler material provided in the proton...
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7544764 |
Sulfonated polymer composition for forming fuel cell electrodes
A membrane electrode assembly for a fuel cell is described. The materials for the membrane electrode assembly are formed from sulfonated polymers. A polymer dispersion ink containing the sulfonated...
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7544278 |
Ion exchange membranes, methods and processes for production thereof and uses in specific applications
The invention includes novel anion exchange membranes formed by in situ polymerization of at least one monomer, polymer or copolymer on a woven support membrane and their methods of formation. The...
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7541107 |
Solid polyelectrolyte, assembly of membrane and electrodes, amd fuel cell
An object of the present invention is to provide a highly durable solid polymer electrolyte that has a deterioration resistance equal to or higher than that of the fluorine-containing solid polymer...
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7540991 |
Ion conductive polymer electrolyte membrane and production method for the same
The present invention provides an electrolyte membrane formed of an ion conductive composition. Said composition contains a liquid crystalline polymer having an ionic dissociative group. Molecular...
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7540984 |
Proton-conducting membrane and the use thereof
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...
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7527887 |
Structures of the proton exchange membranes with different molecular permeabilities
The invention relates to the structures of proton exchange membranes with different molecular permeabilities, especially to the proton exchange membranes suitable for the applications in Direct...
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7521141 |
Innovative method for the preparation of proton conducting nanopolymeric membranes for use in fuel cells or in catalytic membrane reactors
The invention is based on the preparation of an organic solution of preferably phosphonic acids and tetravalent metals salts, preferably of Zr, Ti, Sn and Ce, in organic solvents, which behaves as...
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7517604 |
Fuel cell electrolyte membrane with acidic polymer
An electrolyte membrane is formed by an acidic polymer and a low-volatility acid that is fluorinated, substantially free of basic groups, and is either oligomeric or non-polymeric.
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7507771 |
Ion conductive copolymers containing one or more hydrophobic oligomers
In one aspect, the invention provides ion conductive copolymers comprising (1) a plurality of first oligomers, (2) a plurality of second oligomers, (3) ion conductive monomers and (4) linking...
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7497968 |
Dilute solutions of lyotropic liquid crystalline polymers, methods of making same and compositions prepared from same
The invention features dilute solutions of rigid rod or extended rod lyotropic liquid crystalline polymers prepared from high concentration polymerization mixtures. The invention also features...
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7488549 |
Proton conducting polymer, polymer membrane comprising the same, method of manufacturing the polymer membrane, and fuel cell using the polymer membrane
A proton conducting polymer having a repeating unit given by formula (1) below is provided.
A proton conducting polymer membrane manufactured using the proton conducting polymer can be more...
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7485227 |
Polyazole-based polymer films
The present invention relates to polymer films and a polymer membrane having an improved mechanical property profile produced therefrom, to a process for producing them and to their use. The...
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7482388 |
Polymer electrolyte membrane having excellent durability
A polymer electrolyte membrane for a polymer electrolyte fuel cell, that overcomes disadvantages of the conventional polymer ion-exchange membranes including fluorine-based polymer electrolyte...
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7473714 |
Materials for use as proton conducting membranes for fuel cells
A family of polymers having pendent sulfonate moieties connected to polymeric main chain phenyl groups are described. These polymers are prepared by the steps of polymerization (using a monomer...
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7462681 |
Polycyanurate compositions
A polycyanurate composition (I), wherein “n” is a positive integer of about 1 to about 10, and wherein R, R′, and R″ comprising at least one of C, H, N, O, F, Si, P, S, Cl, Br, I, and any...
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7462223 |
Method for producing a membrane from a crosslinked polymer blend, and corresponding fuel cell
The present invention relates to a polymer blend membrane comprising a bridged polymer which is produced by a selected process. The membrane of the invention displays a significantly improved...
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7459505 |
Block copolymers with acidic groups
Block copolymer that can be formed into an ion-conductive membrane are provided. The block copolymer of the invention includes a first polymer block and a second polymer block attached to the first...
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7459487 |
Polymer composite membrane and method of making the same
The present invention provides a polymer composite membrane having a polymer membrane and a poly(furfuryl alcohol) filling internal pores of the polymer membrane. The polymer composite membrane can...
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7452621 |
Polymer membrane for fuel cell and method for preparing the same
A polymer electrolyte membrane for a fuel cell includes a porous membrane formed with fine pores, hygroscopic polymer layers coated inside the fine pores of the porous membrane, and proton...
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7445867 |
Electrode structure for solid-polymer type fuel cell
An electrode structure for a polymer electrolyte fuel cell comprises a pair of electrode catalyst layers and a polymer electrolyte membrane held between the electrode catalyst layers. The polymer...
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7439275 |
Anion-conducting polymer, composition, and membrane
Anion-conducing polymers and membranes with enhanced stability to aqueous alkali include a polymer backbone with attached sulfonium, phosphazenium, phosphazene, and guanidinium residues....
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7435498 |
Polymer electrolyte membranes crosslinked by nitrile trimerization
A method is provided for making a crosslinked polymer electrolyte, typically in the form of a membrane for use as a polymer electrolyte membrane in an electrolytic cell such as a fuel cell, by...
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7435496 |
Anhydrous proton conductor based on heterocycle attached to a polymer backbone
The invention relates to proton-conducting polymers, including tetrazole-containing polymers. Proton-conducting membranes useful for fuel cell applications are formed from mixtures of a polymer...
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7411022 |
Reinforced polymer electrolyte membrane
A method is provided for making a reinforced polymer electrolyte membrane, such as may be used in electrolytic cells such as fuel cells, by mixing a sulfonate- or sulfonyl halide-functional polymer...
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7402361 |
Ion conductor structural body and process for producing ion conductor structural body
An ion conductor structural body having a high ion conductivity and excellent mechanical strength, principally comprising is provided. This ion conductor structural body includes (a) a polymer...
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7399791 |
Fluorinated membranes
Ionomeric membranes comprising (per)fluorinated, se-micrystalline or amorphous, ionomeric polymers, having equivalent weight (EW) from 380 g/eq to 1,800 g/eq, which used in fuel cells, under the...
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7388035 |
Method for preparing poly(2,5-benzimidazole)
A method for preparing poly(2,5-benzimidazole) whereby 3,4-diaminobenzoic acid is polymerized using a dehydrating reagent containing P 2 O 5 and CX 3 SO 3 H where X is H or F. The...
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7368505 |
Graft copolymers
This invention relates to methods of making graft copolymers, and articles having such graft copolymers. The methods may provide better control than in radicalization or photoinitiated...
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7368200 |
Composite polymer electrolyte membranes and electrode assemblies for reducing fuel crossover in direct liquid feed fuel cells
A composite proton exchange membrane includes first and second outer proton exchange membrane layers each having an exterior peripheral portion. An inner proton exchange membrane layer is...
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7368198 |
Polymer nanocomposite membrane and fuel cell using the same
A hydrogen ionic conductive inorganic material having a layered structure, wherein a moiety containing a functional group with hydrogen ionic conductivity is introduced between layers of an...
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7361729 |
Ion-conducting sulfonated polymeric materials
Sulfonated polymers are made by the direct polymerization of a sulfonated monomer to form the sulfonated polymers. The types of sulfonated polymers may include polysulfones or polyimides. The...
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7357999 |
Nanocomposite electrolyte membrane and fuel cell employing the same
A nanocomposite electrolyte membrane capable of suppressing cross-over of a polar organic fuel and a fuel cell using the nanocomposite electrolyte membrane are provided. The nanocomposite...
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7348089 |
Membrane-electrode assembly for direct methanol type fuel cell and proton conductive membrane
A membrane-electrode assembly for direct methanol type fuel cell and a proton conductive membrane for direct methanol type fuel cell are disclosed. The membrane-electrode assembly comprises a...
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7348088 |
Polymer electrolyte membrane
A polymer electrolyte membrane is provided having a thickness of 90 microns or less and comprising a polymer, said polymer comprising a highly fluorinated backbone and recurring pendant groups...
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