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Protonenleitende Polymermembran sowie Verfahren zu deren Herstellung

Polymer membrane with segmented catalyst coating, used in planar micro-fuel cell array for mobile electrical or electronic equipment, is made by applying uniform catalyst coating and partial removal to leave segments.
 
: Hahn, R.; Wagner, S.; Schmitz, A.

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Frontpage ()

DE 2002-10224452 A: 20020529
DE 2002-10224452 A: 20020529
WO 2003-EP5304 A: 20030520
EP 2003-732431 AW: 20030520
DE 10224452 C1: 20031120
EP 1508181 A1: 20050223
B01D0071
H01M0001
H01M0008
German
Patent, Electronic Publication
Fraunhofer ISE ()

Abstract
Die vorliegende Erfindung betrifft eine protonenleitende Polymermembran sowie ein Verfahren zu deren Herstellung. Hierbei wird, ausgehend von einer Katalysatorschicht, welche homogen auf der Polymermembran (3) aufgebracht ist, durch Mikrostrukturierung die Katalysatorschicht in mehrere Katalysatorsegmente (1a, 1b) unterteilt, so dass auf kleinstmoeglichem Raum benachbarte Brennstoffzelleneinheiten einer planaren Brennstoffzellenanordnung realisierbar sind.

 

DE 10224452 C UPAB: 20031216 NOVELTY - In the production of a polymer membrane (3) provided with a catalyst layer in regions on at least one side, a homogeneous catalyst is applied to the membrane and removed in places to produce separate catalyst segments (1a, 1b; 2a, 2b). DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included the following: (1) proton-conducting polymer membrane with a catalyst layer divided into not less than 2 segments on at least one side, in which the distance between these catalyst segments is less than 0.5 mm; (2) planar micro-fuel cell array containing this membrane or a coated membrane made as described above. USE - The proton-conducting membrane or polymer membrane with segmented catalyst coating is used in planar micro-fuel cell arrays (claimed), which are useful in mobile electrical and electronic equipment. ADVANTAGE - The membrane with catalyst segments makes very efficient use of the entire area of the polymer membrane and hence increases the degree of efficiency of small planar fuel cell arrays. The process is very cost-effective, as all the usual process for making membrane electrode units are suitable, whereas existing methods of segmenting the catalyst layer entail significant capital costs.

: http://publica.fraunhofer.de/documents/PP-1448.html