摘要:
The present invention relates to proton-conducting polymer membranes which comprise polyazoles containing sulfonic acid groups and is obtainable by a process comprising the steps A) mixing of one or more aromatic and/or heteroaromatic tetraamino compounds with one or more aromatic and/or heteroaromatic carboxylic acids or derivatives thereof which contain at least two acid groups per carboxylic acid monomer, with at least part of the tetraamino compounds and/or the carboxylic acids comprising at least one sulfonic acid group, or mixing of one or more aromatic and/or heteroaromatic diaminocarboxylic acids, of which at least part comprises sulfonic acid groups, in polyphosphoric acid to form a solution and/or dispersion, B) heating of the solution and/or dispersion obtainable according to step A) under inert gas to temperatures of up to 350° C. to form polyazole polymers, C) application of a layer using the mixture from step A) and/or B) to a support, D) treatment of the membrane from the step C) until it is self-supporting.
摘要:
The present invention relates to a proton-conducting polymer membrane comprising polyazoles which is obtainable by a process comprising the steps A) preparation of a mixture comprising polyphosphoric acid, at least one polyazole and/or one or more compounds suitable for forming polyazoles under the action of heat in step B), B) heating of the mixture obtainable according to step A) to temperatures up to 400° C. under inert gas, C) application of a layer to a support using the mixture from step A) and/or B), D) treatment of the membrane formed in step C) until it is self-supporting, wherein the treatment of the membrane is carried out using a hydrolysis liquid comprising oxo acids of phosphorus and/or oxo acids of sulfur.
摘要:
The present invention relates to a proton-conducting multilayer electrolyte membrane with a barrier layer, a process for producing it and a fuel cell containing such a membrane. The novel multilayer electrolyte membranes equipped with a barrier layer prevent leaching of the mineral acid and reduce the overvoltage at the cathode.
摘要:
The present invention relates to a proton-conducting polymer electrolyte membrane based on polyvinylphosphonic acid/polyvinylsulfonic acid polymers, which owing to their excellent chemical and thermal properties, can be used for a variety of purposes and is particularly suitable as polymer electrolyte membrane (PEM) in PEM fuel cells.
摘要:
The present invention relates to a proton-conducting polymer membrane which is based on polyvinylsulphonic acid and is obtainable by a process comprising the steps A) mixing of a polymer with vinyl-containing sulphonic acid, B) formation of a flat structure using the mixture from step A) on a support, C) polymerization of the vinylsulphonic acid present in the flat structure from step B). Owing to its excellent chemical and thermal properties, a membrane according to the invention can be used in a wide variety of applications and is particularly useful as polymer electrolyte membrane (PEM) in PEM fuel cells.
摘要:
The present invention concerns a proton-conducting electrolyte membrane obtainable by a method comprising the following steps: A) expanding a polymer film with a liquid that contains a vinyl-containing phosphonic acid, and B) polymerisation of the vinyl-containing phosphonic acid present in the liquid introduced in step A). An inventive membrane, thanks to its exceptional chemical and thermal properties, is very versatile in its use and is particularly suitable as a polymer-electrolyte-membrane (PEM) in so-called PEM fuel cells.
摘要:
An acid-doped, single-layer or multilayer polymer membrane comprising at least one layer A of a polymer blend with contains:a) from 0.1 to 99.9% by weight of one or more polymers comprising recurring azole units of the formula 1A and/or 1B: wherein the radicals Ar, Ar1, and Ar2 are tetravalent, divalent or trivalent aromatic or heteroaromatic groups and the radicals X are each and oxygen atom, a sulfur atom or an amino group bearing a hydrogen atom, a 1-20 carbon group, in admixture with b) from 99.9 to 0.1% by weight of a polysulfone containing recurring unit having no sulfonic acid groups.