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MEA Segmentation using LASER Ablation
Author(s) -
Schmitz A.,
Wagner S.,
Hahn R.,
Weil A.,
Schneiderlöchner E.,
Tranitz M.,
Hebling C.
Publication year - 2004
Publication title -
fuel cells
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.485
H-Index - 69
eISSN - 1615-6854
pISSN - 1615-6846
DOI - 10.1002/fuce.200400024
Subject(s) - laser ablation , materials science , planar , laser , ablation , electrode , electrical impedance , coating , segmentation , point (geometry) , computer science , optics , nanotechnology , artificial intelligence , electrical engineering , chemistry , geometry , mathematics , physics , computer graphics (images) , engineering , aerospace engineering
Abstract In a flat design, several serial connected single cells are arranged side by side in a plane. Sealing problems can be reduced by using one single MEA for all cells. This MEA must consist of segments of catalyst coated area. In order to avoid short circuits between serial interconnected cells their catalyst segments have to be electrically insulated. The distance between the segments has to be minimised in order to make the most efficient use of the MEA area. By the use of conventional coating technology the distances between electrode areas are in the range of some millimetres. With LASER ablation the distance between the segments can be reduced to less than 200 μm. Results of removing the catalyst by LASER ablation are analysed by SEM and light microscopy. The electrical resistance between segmented areas is determined with 4‐point probe impedance measurements. The influence of segmentation on cell performance is characterised in a planar serial connected test cell.