Effect of Micro Porous Layer (MPL) on Water Management Investigated by Electrochemical Impedance Spectroscopy (EIS) on a Running PEM-FC

Autor:	Paola Gallo Stampino, Davide Brivio, Giovanni Dotelli, Luca Omati, Paolo Grassini
Jazyk:	angličtina
Rok vydání:	2010
Předmět:	Materials science law Analytical chemistry Coated membrane Relative humidity Microporous material Porosity Polarization (electrochemistry) Cathode Anode Dielectric spectroscopy law.invention
Popis:	Gas diffusion media (GDM) based on carbon cloth material (SAATI S.p.A.) and coated with Micro Porous Layers (MPL) containing 12% or 40% PTFE were investigated. The GDMs were tested in a cell using a catalyst coated membrane (CCM) made from Nafion® 212 and with a Pt load of 0.3/0.6 mg cm-2. The test conditions were: 60 °C, flow rates of 0.2 Nl min-1 at the anode and 1.0 Nl min-1 at the cathode; relative humidity (RH) equal to 60 % or 100 % at cathode side and fixed at 80 % at the anode; the GDMs were compressed to 50 % of their initial thickness. The cell performances were assessed by analysis of the polarization curves, and the influence of PTFE loading of the MPLs on water management ability was investigated at different air RH conditions by AC impedance spectroscopy.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e2e8c877b4ecbaa4a58c3418322e553d http://hdl.handle.net/11311/574800 Zobrazit plný text záznamu