Manufacturing of Direct Methanol Fuel Cell Electrodes by Spraying

Autor:	Sam Solomon, Jeremy P. Meyers, Babar M. Koraishy, Brian McDonald, Douglas Morter, Kris Wood
Rok vydání:	2010
Předmět:	Direct methanol fuel cell Materials science Coating Drop (liquid) Nozzle Electrode engineering Proton exchange membrane fuel cell Composite material engineering.material Porosity Spray nozzle
Zdroj:	ECS Transactions. 33:1997-2010
ISSN:	1938-6737 1938-5862
DOI:	10.1149/1.3484691
Popis:	Spraying is a well-established coating process used to fabricate electrodes for both PEMFC and DMFC fuel cells, and also for the fabrication of gas-diffusion media (GDM) used in fuel cells (1-7). Despite its popularity as a process there is little basic research on how spray parameters and nozzle characteristics affect the drop sizes of catalyst inks, and how those droplet sizes, affect the electrode structure, porosity, conductance and eventually the overall MEA performance. We present results from an experimental study to systematically answer these questions, characterizing the spray nozzle and measuring drop diameters, and then investigating the microstructural effects on electrode performance. For this purpose, first a spraying apparatus was developed and calibrated, and MEA's were fabricated with fixed electrode loadings but with different droplet sizes. Droplet sizes were controlled by characterizing the spray nozzle and measuring the spray by two methods, optically by utilizing high-speed photography and by the hot wire method (8-12).
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::0e809b69e00b99f85b2edeecb0aba270 https://doi.org/10.1149/1.3484691 Zobrazit plný text záznamu