Ionic Resistance of a Cathode Catalyst Layer with Various Thicknesses by Electrochemical Impedance Spectroscopy for PEMFC

2012 ◽  
Vol 159 (4) ◽  
pp. B378-B384 ◽  
Author(s):  
Ju Wan Lim ◽  
Yong-Hun Cho ◽  
Minjeh Ahn ◽  
Dong Young Chung ◽  
Yoon-Hwan Cho ◽  
...  
Keyword(s):  
Electrochemical Impedance Spectroscopy ◽  
Impedance Spectroscopy ◽  
Electrochemical Impedance ◽  
Catalyst Layer ◽  
Cathode Catalyst ◽  
Cathode Catalyst Layer

Study of Cathode Catalyst Layer Parameters for HT-PEMFC Using Electrochemical Impedance Spectroscopy

2017 ◽  
Vol 80 (8) ◽  
pp. 27-36 ◽  
Author(s):  
Shuai Liu ◽  
Yasser Rahim ◽  
Klaus Wippermann ◽  
Holger Janßen ◽  
Werner Lehnert ◽  
...  
Keyword(s):  
Electrochemical Impedance Spectroscopy ◽  
Impedance Spectroscopy ◽  
Electrochemical Impedance ◽  
Catalyst Layer ◽  
Cathode Catalyst ◽  
Cathode Catalyst Layer

scholarly journals Analysis of MEA’s durability under Accelerated Stress Tests that mimic realistic automotive operations

2022 ◽  
Vol 334 ◽  
pp. 06010
Author(s):  
Elena Colombo ◽  
Andrea Baricci ◽  
Andrea Casalegno
Keyword(s):  
Electrochemical Impedance ◽  
Catalyst Layer ◽  
Cathode Catalyst ◽  
Impedance Spectra ◽  
Operational Mode ◽  
Stress Tests ◽  
Electrochemical Impedance Spectra ◽  
Voltage Loss ◽  
Cathode Catalyst Layer

This work aims at studying MEA’s ageing under single operational “mode” accelerated stress tests (AST), that were specifically designed to replicate under hydrogen/air feeding the main stressors of realistic operations in the automotive sector. A methodology for developing AST is here presented and preliminary results about the activity included. In particular, low power and high power functioning have been mimicked in a Zero-Gradient hardware, which allows a reliable materials comparison. Quantities, measurable in-situ and operando, have been tracked during ageing, like cell power, polarization curves, Pt active area, oxygen mass transport resistance, Electrochemical Impedance Spectra. The final objective is to clarify the underlying ageing mechanisms and assess the contribution of each specific operation to the MEA lifetime, focusing in particular on the cathode catalyst layer durability. Moreover, the rate of voltage loss for the new ASTs has been successfully correlated to the degradation observed under a complete driving cycle protocol.

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