Homogeneity analysis of square meter-sized electrodes for PEM electrolysis and PEM fuel cells / Andrea Burdzik in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 15, N° 6 (11/2018)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 15, N° 6 (11/2018) . - p. 1423-1432 Titre : Homogeneity analysis of square meter-sized electrodes for PEM electrolysis and PEM fuel cells Type de document : texte imprimé Auteurs : Andrea Burdzik, Auteur ; Markus Stähler, Auteur ; Irene Friedrich ; Marcelo Carmo ; Detlef Stolten Année de publication : 2018 Article en page(s) : p. 1423-1432 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Electrolyse Enduction par filière Membranes (technologie) Piles à combustible Poids Polyélectrolytes Revêtements Supports de catalyseurs Index. décimale : 667.9 Revêtements et enduits Résumé : Electrodes for polymer electrolyte membrane electrolyzers and fuel cells are manufactured by coating a catalyst dispersion, consisting of precious metal, ionomer and solvents, onto a substrate that is subsequently dried. One target of current research is to produce square meter-sized electrodes, but so far the homogeneity that can be achieved in this scaling is unclear. To quantify the achievable homogeneity of an electrode, manufactured by means of slot die coating in a roll-to-roll pilot plant, this study focuses first on the selection of an appropriate substrate by investigating thickness, basis weight and surface free energy distribution at the square meter scale. Afterward, a dispersion is coated on the selected substrate, dried and investigated with respect to thickness and basis weight distribution. Among the investigated substrates, Kapton has the smallest scatter in terms of thickness and basis weight. The subsequent coating results in a precious metal loading of 1.10 mg cm−2, with a scattering of 5.5% that can be further reduced to 4.5% when edge effects can be prevented. These results are now available for further research in which it is necessary to investigate whether or not these fluctuations affect the achievable electrochemical efficiencies of electrodes. Note de contenu : - EXPERIMENTAL : Thickness and basis weight distribution - Surface free energy distribution - Substrate coating - Catalyst basis weight distribution - RESULTS AND DISCUSSION : Catalyst dispersion analysis - Laboratory-scale coating - Thickness and basis weight distribution of decal substrates - SFE distribution of decal substrate - Thickness and basis weight distribution of the coated substrate DOI : 10.1007/s11998-018-0074-3 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-018-0074-3.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31363 [article]

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