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Observation of Preferential Pathways for Oxygen Removal through Porous Transport Layers of Polymer Electrolyte Water Electrolyzers.
Satjaritanun, Pongsarun; O'Brien, Maeve; Kulkarni, Devashish; Shimpalee, Sirivatch; Capuano, Cristopher; Ayers, Katherine E; Danilovic, Nemanja; Parkinson, Dilworth Y; Zenyuk, Iryna V.
Afiliación
  • Satjaritanun P; Department of Chemical and Biomolecular Engineering, National Fuel Cell Research Center, University of California Irvine, Irvine, CA, USA.
  • O'Brien M; Department of Material Science and Engineering, University of California Irvine, Irvine, CA, USA.
  • Kulkarni D; Department of Material Science and Engineering, University of California Irvine, Irvine, CA, USA.
  • Shimpalee S; Department of Chemical Engineering, University of South Carolina, Columbia, SC, USA.
  • Capuano C; Nel Hydrogen, Wallingford, CT, USA.
  • Ayers KE; Nel Hydrogen, Wallingford, CT, USA.
  • Danilovic N; Lawrence Berkeley National Laboratory, Berkeley, CA, USA.
  • Parkinson DY; Lawrence Berkeley National Laboratory, Berkeley, CA, USA.
  • Zenyuk IV; Department of Chemical and Biomolecular Engineering, National Fuel Cell Research Center, University of California Irvine, Irvine, CA, USA.
iScience ; 23(12): 101783, 2020 Dec 18.
Article en En | MEDLINE | ID: mdl-33294791
ABSTRACT
Understanding the relationships between porous transport layer (PTL) morphology and oxygen removal is essential to improve the polymer electrolyte water electrolyzer (PEWE) performance. Operando X-ray computed tomography and machine learning were performed on a model electrolyzer at different water flow rates and current densities to determine how these operating conditions alter oxygen transport in the PTLs. We report a direct observation of oxygen taking preferential pathways through the PTL, regardless of the water flow rate or current density (1-4 A/cm2). Oxygen distribution in the PTL had a periodic behavior with period of 400 µm. A computational fluid dynamics model was used to predict oxygen distribution in the PTL showing periodic oxygen front. Observed oxygen distribution is due to low in-plane PTL tortuosity and high porosity enabling merging of oxygen bubbles in the middle of the PTL and also due to aerophobicity of the layer.
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Texto completo: 1 Colección: 01-internacional Banco de datos: MEDLINE Tipo de estudio: Prognostic_studies Idioma: En Revista: IScience Año: 2020 Tipo del documento: Article País de afiliación: Estados Unidos
Texto completo
Imprimir
XML
PubMed Links
Buscar en Google

Texto completo: 1 Colección: 01-internacional Banco de datos: MEDLINE Tipo de estudio: Prognostic_studies Idioma: En Revista: IScience Año: 2020 Tipo del documento: Article País de afiliación: Estados Unidos