摘要:
The invention relates to a sulfonated, aromatic polymer comprising the recurring structural unit of formula (I): -O-Ar1(SO3R)n-C(CF3)2-Ar1(SO3R)n-O-Ar?2-(X-Ar2)¿m-, wherein Ar?1 and Ar2¿ represent independently of each other bivalent aromatic or heteroaromatic substituted radicals that may contain one or several monovalent organic groups which are inert under actual operating conditions, R represents hydrogen, an alkaline or alkaline earth ion or an ammonium ion, n is a whole number from 0 to 3, m is 0, 1 or 2 and X represents a group -CO-, -O-, -C¿p?H2p-, -CpF2p- or -S-, wherein p is a whole number from 1 to 10. These polymers can be processed into membranes with a high proton conductability. Preferably, said membranes are used in fuel cells.
摘要:
The invention relates to membranes containing 30-99.5 wt. % of a sulphonated, strictly alternating polyetherketone with repeating units of formula (I) -AR-O-Ar'-CO-, wherein Ar and Ar' are, independently from each other, bivalent aromatic radicals, with an ion exchanger capacity of 1.3-4.0 meg (-SO3H/g) (polymer) and 0.5-70 wt. % of a partially fluorinated, non perfluorinated or perfluorinated polymer (B). The membranes can be used in fuel cells.
摘要:
Disclosed is a composition containing 30-95 wt.% sulphonated aromatic polyether ketone with an ion exchanger capacity of 1.3-4.0. meq (-SO3H)/g polymer, and 0.5-70 wt.% polybenzimidazol. The inventive composition can be processed into membranes like the PEK-type of sulphonated polyether ketone. Preferably, said membranes are used in fuel cells.
摘要:
The invention relates to an electrochromic glass component, particularly for motor vehicle mirrors, which contains a doped ion-conducting basic polymer (4) as the ion-conducting layer. The electrochromic glass component consists, for example of a glass substrate (1) as well as a layer system having an electrochromic layer (2), a mirror layer (3), a doped polymer membrane (4), for example of polybenzimidazole polymer, a proton store (5), a rear electrode (6) and a polyester film (7). The layer system is sealed by a seal (8) which closes the coating system towards the glass substrate (1).
摘要:
A membrane used in polymer electrolyte-fuel cells, containing sulfonated aromatic polyetherketone (sPEEK) of general formula (I), characterized in that the ion exchange equivalent (IEC) of said sulfonated polyetherketone is 1.35-1.95 nmol (-SO3H)/g (polymer) and in that the membrane has a long-term stability of at least 1,000 hours at an operating voltage of 0.4-1.1V.
摘要:
The invention relates to an electrochromic glass component, particularly for motor vehicle mirrors, which contains a doped ion-conducting basic polymer (4) as the ion-conducting layer. The electrochromic glass component consists, for example of a glass substrate (1) as well as a layer system having an electrochromic layer (2), a mirror layer (3), a doped polymer membrane (4), for example of polybenzimidazole polymer, a proton store (5), a rear electrode (6) and a polyester film (7). The layer system is sealed by a seal (8) which closes the coating system towards the glass substrate (1).
摘要:
The invention relates to a method for producing aqueous, hydrous and non-aqueous solutions of polymers that are functionalized by acid groups. The method is characterized in that the heat needed to produce the solution is supplied by microwave radiation. These solutions can be used as a starting material for the production of gas diffusion electrodes, fuel cells and platinum nanoparticles stabilized by polymer-electrolytes.
摘要:
The invention relates to soluble nanoparticles having a diameter of 0.5 to 3 nm, preferably of 1 to 2 nm, containing the platinum alone or platinum and other metals of the platinum group. The nanoparticles are embedded in a protective colloid containing polymeric betaine which can be degraded by hydrolysis. The betaine is preferably a carbobetaine of formula -N?+R1R2-(-CH¿2-)n-CO2-, a phosphobetaine of formula -N+R1R2-(-CH2-)n-PO3- or, preferably a sulfobetaine of formula -N+R1R2-(-CH2-)n-SO3-, whereby R?1 and R2¿, independent of one another, can be the same or different, and represent alkyl radicals of 1 to 6 carbon atoms, and n represents 1, 2, or 3. In addition, the invention relates to a method for producing the nanoparticles and catalysts produced therefrom as well as to their utilization for fuel cells.
摘要:
The invention relates to a single or multi-layered plastic membrane doped with acid and comprising at least one layer A of a polymer mixture consisting of a) between 0.1 and 99.9 wt. % of at least one polymer comprising recurrent azole units of general formulae (1A) and/or (1B) - wherein radicals Ar, Ar?1 and Ar2¿ represent tetravalent, divalent or trivalent aromatic or heteroaromatic groups, and radicals X, which are the same inside a recurrent unit, represent an oxygen atom, a sulphur atom, or an amino group having a hydrogen atom and a group comprising 1 to 20 carbon atoms, preferably a branched or unbranched alkyl or alkoxy group, or an aryl group as a further radical - mixed with b) between 99.9 and 0.1 wt. % of a polysulfone comprising no sulfonic acid groups but comprising recurrent units of general formulae (2A, 2B, 2C, 2D, 2E, 2F) and/or (2G) wherein radicals R, the same or different, independently represent 1,2-phenylene, 1,3-phenylene, 1,4-phenylene, 4,4'-biphenylene, a divalent radical of a heteroaromatic compound, a divalent radical of a C¿10?-aromatic compound and/or a divalent radical of a C14-aromatic compound. The invention also relates to a method for producing said doped plastic membrane, the use thereof in fuel cells, during electrolysis, in capacitors, in battery systems and in electrochromic applications, in addition to membrane electrode units comprising at least one inventive plastic membrane.