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Polymer electrolyte membrane comprising coordination polymer

A technology of coordination polymer and electrolyte membrane, applied in solid electrolyte fuel cells, fuel cell additives, fuel cell components, etc., can solve problems such as blocking anode catalysts and power reduction

Inactive Publication Date: 2008-11-26
GKSS FORSCHUNGSZENTRUM GEESTHACHT GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This gas blocks the anode catalyst, resulting in a loss of power

Method used

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  • Polymer electrolyte membrane comprising coordination polymer
  • Polymer electrolyte membrane comprising coordination polymer
  • Polymer electrolyte membrane comprising coordination polymer

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Experimental program
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Effect test

Embodiment 1

[0050] polymer synthesis

[0051] Sulfonated poly(ether ether ketone) (SPEEK) with a sulfonation degree of 51% (ion exchange capacity 1.57meq / g) was prepared using Wijers M.C., Supported liquid membranes for removal of heavy metals: permeability, selectivity and stability.Dissertation, University of Twente, The Netherlands, 1996 described the method. The poly(ether ether ketone) supplied as Victrex granules was dried under vacuum overnight at 90°C. 20 g of polymer were then dissolved in 1 liter of concentrated sulfuric acid (95% to 98%) and stirred at room temperature for 45 hours. followed by K 2 CO 3 The above polymer solution was precipitated under mechanical stirring in ice water until the pH was neutral. The precipitated polymer was left overnight. The precipitated polymer was then filtered and washed several times with distilled water and dried at 80° C. for 12 hours. The degree of sulfonation is determined by elemental analysis, e.g. Nolte R., Ledjeff K., Bauer M....

Embodiment 2

[0057] Synthesis of MOFs

[0058] Synthetic MOF(Cu 3 (BTC) 2 (H 2 O) 3 .xH 2 O), such as Schlichte K., Kratzke T., Kaskel S., Improved synthesis, thermal stability and catalytic properties of the metal-organic framework compound Cu 3 (BTC) 2 , Microporous and Mesoporous Materials 73 (2004), 81-88 described. 0.857g (3.6mmol) Cu(NO 3 ) 2 .3H 2 O was dissolved in 12 ml deionized water and mixed with 0.42 g (2.0 mmol) trimesic acid dissolved in 12 ml methanol. The solution was added to a 40 ml Teflon container placed in an autoclave and heated at 120° C. for 12 hours. The synthesis temperature (120°C) makes Cu 2 The formation of O is suppressed because Cu is avoided 2+ reduction of ions. The MOFs were characterized by nitrogen physisorption and X-ray diffractometer. Nitrogen physisorption measurements were performed at 77K using a microcrystallography ASAP 2000 instrument. X-ray powder diffraction patterns were taken with a STOE diffractometer equipped with a positi...

Embodiment 3

[0060] Composite membrane preparation

[0061] 2.3 g of polymer were dissolved in 33 g of dimethylsulfoxide (7% by weight). Then 0.12 g of MOF (5% by weight, expressed as weight of MOF / (weight of polymer and MOF) x 100%) was added to the polymer solution. The solution was stirred for 6 hours and poured on a glass plate at 60°C to remove the solvent. The glass plates were previously hydrophobized with octadecyltrichlorosilane. After casting, the SPEEK film containing 5% MOF was dried in a vacuum oven at 80 °C for 10 hours. The final thickness of the film was 96 microns. The sulfonated composite membrane was converted to its acid form by immersing the cast membrane in 2N sulfuric acid at room temperature for 24 hours, followed by two dips in water for 24 hours to ensure complete washing of residual sulfuric acid .

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Abstract

The invention relates to a polymer electrolyte membrane, especially of a fuel cell, and to the use of a polymer electrolyte membrane. The invention further relates to a process for producing a polymer electrolyte membrane, especially a proton-conductive polymer electrolyte membrane, preferably of a fuel cell. The polymer electrolyte membrane is developed further by virtue of the polymer electrolyte membrane comprising coordination polymers (metal organic frameworks).

Description

technical field [0001] The invention relates to a polymer electrolyte membrane, especially a polymer electrolyte membrane in a fuel cell, and uses of the polymer electrolyte membrane. The invention furthermore relates to a process for producing, in particular, a proton-conducting polymer electrolyte membrane, preferably a polymer electrolyte membrane in a fuel cell. Background technique [0002] Fuel cells are considered to be an innovative alternative to conventional energy harvesting methods with low emissions. Polymer electrolyte membrane-fuel cells (PEM) are of particular interest for mobile applications. The proton-conducting polymer membrane is the central element of this type of fuel cell. Perfluorinated polymers containing pendant sulfonic acid groups made by DuPont, and similar products from Asahi, remain the market-dominating membrane materials for this application. [0003] Much research has been done on the use of other polymers as membrane materials in fuel ...

Claims

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Application Information

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IPC IPC(8): C08J5/22
CPCC08J5/2275Y02E60/523C08J2381/02Y02E60/50H01M8/10H01M8/04H01M8/02
Inventor 多米尼克·德·菲格雷多·戈梅斯苏珊娜·努内斯克劳斯-维克托·派内曼斯特凡·卡斯克尔沃尔克·阿贝茨
Owner GKSS FORSCHUNGSZENTRUM GEESTHACHT GMBH
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