摘要:
The present invention relates to a proton-conducting polymer membrane coated with a catalyst layer, said polymer membrane comprising polymers which comprise phosphonic acid groups and are obtainable by polymerizing monomers comprising phosphonic acid groups, characterized in that the catalyst layer comprises ionomers which comprise phosphonic acid groups and are obtainable by polymerizing monomers comprising phosphonic acid groups.
摘要:
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 polymer films, polymer membranes and separation membranes of the invention are produced from selected polymer raw materials and have excellent chemical, thermal. and mechanical properties as are required for use as polymer electrolyte membranes (PEMs) in PEM fuel cells or in apparatuses for the filtration and/or separation of gases and/or liquids or for reverse osmosis.
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:
Catalyst ink comprising one or more catalyst materials, a liquid medium and polymer particles comprising one or more proton-conducting polymers, an electrode comprising at least one catalyst ink according to the present invention, a membrane-electrode assembly comprising at least one electrode according to the invention or comprising at least one catalyst ink according to the present invention, a fuel cell comprising at least one membrane-electrode assembly according to the invention and also a process for producing a membrane-electrode assembly according to the present invention.
摘要:
A membrane electrode assembly, comprising at least one phosphoric acid-containing polymer electrolyte membrane and at least one gas diffusion electrode, said gas diffusion electrode comprising: i. at least one catalyst layer and ii. at least one gas diffusion medium having at least two gas diffusion layers, the first gas diffusion layer comprising an electrically conductive macroporous layer in which the pores have a mean pore diameter in the range from 10 μm to 30 μm, the second gas diffusion layer comprising an electrically conductive macroporous layer in which the pores have a mean pore diameter in the range from 10 μm to 30 μm, the gas diffusion medium comprising polytetrafluoroethylene, the first gas diffusion layer having a higher polytetrafluoroethylene concentration than the second gas diffusion layer.
摘要:
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.
摘要:
The invention relates to a membrane electrode assembly which comprises two gas diffusion layers, each contacted with a catalyst layer, which are separated by a polymer-electrolyte membrane. Said polymer electrolyte membrane has an inner area which is contacted with a catalyst layer, and an outer area which is not provided on the surface of a gas diffusion layer. The inventive assembly is characterized in that the thickness of all components of the outer area is 50 to 100%, based on the thickness of all components of the inner area. The thickness of the outer area decreases over a period of 5 hours by not more than 5% at a temperature of 80° C. and a pressure of 5 N/mm2. The decrease in thickness is determined after a first compression step which takes place over a period of 1 minute at a pressure of 5 N/mm2.
摘要翻译:本发明涉及一种膜电极组件,其包括两个气体扩散层,每个气体扩散层与催化剂层接触,所述催化剂层由聚合物 - 电解质膜分离。 所述聚合物电解质膜具有与催化剂层接触的内部区域和不设置在气体扩散层的表面上的外部区域。 本发明的组件的特征在于,基于内部区域的所有部件的厚度,外部区域的所有部件的厚度为50至100%。 在80℃的温度和5N / mm 2的压力下,外部区域的厚度在5小时内减少不超过5%。 在第一压缩步骤之后,在5N / mm 2的压力下经过1分钟的时间段确定厚度的减小。