Measurements of proton conductivity in the active layer of PEM fuel cell gas diffusion electrodes

Autor:	C. Boyer, O. Velev, A. J. Appleby, Sergei Gamburzev, Supramaniam Srinivasan
Rok vydání:	1998
Předmět:	General Chemical Engineering Analytical chemistry Proton exchange membrane fuel cell Electrolyte Conductivity Cathode law.invention Anode chemistry.chemical_compound chemistry law Nafion Electrochemistry Ionic conductivity Layer (electronics)
Zdroj:	Electrochimica Acta. 43:3703-3709
ISSN:	0013-4686
DOI:	10.1016/s0013-4686(98)00128-5
Popis:	This paper reports further studies to understand and optimize the Membrane and Electrode Assembly (MEA) structure in Polymer Electrolyte Membrane Fuel Cells (PEMFCs). The effective proton conductivity in the active catalyst layer was measured as a function of its composition, which consisted of platinum catalyst on carbon support (E-Tek) and Nafion® polymer electrolyte (DuPont de Nemours). The conductivity was calculated from the resistance added to a standard MEA by the addition of an inactive composite layer in the electrolyte path between the anode and cathode. The specific conductivity of the active layer was found to be proportional to the volume fraction of Nafion® in the composite mixture, following the relationship κeffH+≈0.078eNafion+0.004 S cm−1. Modeling studies showed that this ionic conductivity limits the utilized active layer thickness to 20–25 μm.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::55637a7c9f9e290ba2732e50f9f176d9 https://doi.org/10.1016/s0013-4686(98)00128-5 Zobrazit plný text záznamu Full Text from ScienceDirect