Abstract
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.
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Cho, HJ, Jang, H, Lim, S, Cho, E, Lim, TH, Oh, IH, Kim, HJ, Jang, JH, “Development of a Novel Decal Transfer Process for Fabrication of High-Performance and Reliable Membrane Electrode Assemblies for PEMFCs.” Int. J. Hydrog. Energy, 36 (19) 12465–12473 (2011). https://doi.org/10.1016/j.ijhydene.2011.06.113.
Carmo, M, Fritz, DL, Mergel, J, Stolten, D, “A Comprehensive Review on PEM Water Electrolysis.” Int. J. Hydrog. Energy, 38 (12) 4901–4934 (2013). https://doi.org/10.1016/j.ijhydene.2013.01.151.
Jung, CY, Kim, WJ, Yi, SC “Optimization of Catalyst Ink Composition for the Preparation of a Membrane Electrode Assembly in a Proton Exchange Membrane Fuel Cell Using the Decal Transfer.” Int. J. Hydrog. Energy, 37 (23) 18446–18454 (2012). https://doi.org/10.1016/j.ijhydene.2012.09.013.
Mehmood, A, Ha, HY “Parametric Investigation of a High-Yield Decal Technique to Fabricate Membrane Electrode Assemblies for Direct Methanol Fuel Cells.” Int. J. Hydrog. Energy, 38 (28) 12427–12437 (2013). https://doi.org/10.1016/j.ijhydene.2013.07.043.
Mehmood, A, Ha, HY “An Efficient Decal Transfer Method Using a Roll-Press to Fabricate Membrane Electrode Assemblies for Direct Methanol Fuel Cells.” Int. J. Hydrog. Energy, 37 (23) 18463–18470 (2012). https://doi.org/10.1016/j.ijhydene.2012.09.045.
Galagan, Y, de Vries, IG, Langen, AP, Andriessen, R, Verhees, WJ, Veenstra, SC, Kroon, JM, “Technology Development for Roll-to-Roll Production of Organic Photovoltaics.” Chem. Eng. Process. Process Intensif., 50 (5) 454–461 (2011). https://doi.org/10.1016/j.cep.2010.07.012.
Wengeler, L, Schmidt-Hansberg, B, Peters, K, Scharfer, P, Schabel, W “Investigations on Knife and Slot Die Coating and Processing of Polymer Nanoparticle Films for Hybrid Polymer Solar Cells.” Chem. Eng. Process. Process Intensif., 50 (5) 478–482 (2011). https://doi.org/10.1016/j.cep.2010.11.002.
Stocker, M, Stanfield, E, “Metrology for Fuel Cell Manufacturing” (2015). https://doi.org/10.2172/1210884. URL http://www.osti.gov/scitech/servlets/purl/1210884
Stocker, MT, Barnes, BM, Sohn, M, Stanfield, E, Silver, RM, “Development of Large Aperture Projection Scatterometry for Catalyst Loading Evaluation in Proton Exchange Membrane Fuel Cells.” J. Power Sources, 364 130–137 (2017). https://doi.org/10.1016/j.jpowsour.2017.07.092.
Stähler, M, Friedrich, I, “Statistical Investigations of Basis Weight and Thickness Distribution of Continuously Produced Fuel Cell Electrodes.” J. Power Sources, 242 425–437 (2013). https://doi.org/10.1016/j.jpowsour.2013.05.073.
Gutoff, EB, Cohen, ED, Kheboian, GI (eds.), “Coating and drying defects: Troubleshooting Operating Problems”, 2nd Edition, Ch. 8, pp. 157–168. Wiley, Hoboken (2006)
Good, RJ, “Contact Angle, Wetting, and Adhesion: A Critical Review.” J. Adhes. Sci. Technol., 6 (12) 1269–1302 (1992). https://doi.org/10.1163/156856192X00629.
Owens, DK, Wendt, RC, “Estimation of the Surface Free Energy of Polymers.” J. Appl. Polym. Sci., 13 (8) 1741–1747 (1969). https://doi.org/10.1002/app.1969.070130815.
Ström, G, Fredriksson, M, Stenius, P, “Contact Angles, Work of Adhesion, and Interfacial Tensions at a Dissolving Hydrocarbon Surface.” J. Colloid Interface Sci., 119 (2) 352–361 (1987). https://doi.org/10.1016/0021-9797(87)90280-3.
Burdzik, A, Stähler, M, Carmo, M, Stolten, D, “Impact of Reference Values Used for Surface Free Energy Determination: An Uncertainty Analysis.” Int. J. Adhes. Adhes., 82 1–7 (2018). https://doi.org/10.1016/j.ijadhadh.2017.12.002.
Chhabra, R, Richardson, J (eds.), “Chapter 1: Non-Newtonian Fluid Behaviour.” In: Non-Newtonian Flow and Applied Rheology (Second Edition), pp. 1–55. Butterworth-Heinemann, Oxford (2008). https://doi.org/10.1016/B978-0-7506-8532-0.00001-9.
Wilhelmy, L, “Ueber Die Abhängigkeit der Capillaritäts-Constanten des Alkohols von Substanz und Gestalt des benetzten festen Körpers.” Ann. Phys., 195 (6) 177–217 (1863). https://doi.org/10.1002/andp.18631950602.
Brandt, S, Data Analysis Statistical and Computational Methods for Scientists and Engineers. North-Holland Publishing Company, Amsterdam, Ch. 4, pp. 32–34 (1976)
Schmitt, M, Scharfer, P, Schabel, W, “Slot Die Coating of Lithium-Ion Battery Electrodes: Investigations on Edge Effect Issues for Stripe and Pattern Coatings.” J. Coat. Technol. Res., 11 (1) 57–63 (2014). https://doi.org/10.1007/s11998-013-9498-y.
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Burdzik, A., Stähler, M., Friedrich, I. et al. Homogeneity analysis of square meter-sized electrodes for PEM electrolysis and PEM fuel cells. J Coat Technol Res 15, 1423–1432 (2018). https://doi.org/10.1007/s11998-018-0074-3
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DOI: https://doi.org/10.1007/s11998-018-0074-3