TY - GEN
T1 - MODELLING ANALYSIS OF DEGRADATION IN LOW PLATINUM POLYMER ELECTROLYTE MEMBRANE FUEL CELLS
AU - Baricci, A.
AU - Yu, H.
AU - Guetaz, L.
AU - Casalegno, A.
AU - Marchesi, R.
AU - Maric, R.
N1 - Publisher Copyright:
© EFC 2017 - Proceedings of the 7th European Fuel Cell Piero Lunghi Conference.
PY - 2017
Y1 - 2017
N2 - Durability is a key issue of polymer electrolyte membrane fuel cells (PEMFC) with low Platinum loading, mainly because of the instability of Platinum catalyst nanoparticles in the cathode catalyst layer (CL). Degradation of catalyst is critical in consequence of several mechanisms, among which Platinum dissolution. As proposed in the literature, a possible strategy to mitigate Platinum dissolution consists in the development of CLs with gradient properties. In the present work, a theoretical analysis of Platinum dissolution is applied to the interpretation of degradation data recorded under accelerated stress tests (AST) on catalyst-coated membranes (CCMs) with 25 cm2 active area and low Pt loading. A transient model referenced to the literature has been calibrated and validated on a set of experimental data to get insight into the catalyst degradation. The model predicts the formation of a catalyst depleted zone near the interface with polymer membrane, in agreement with TEM observations and the effect of a gradient catalyst structure in the catalyst layer is analyzed.
AB - Durability is a key issue of polymer electrolyte membrane fuel cells (PEMFC) with low Platinum loading, mainly because of the instability of Platinum catalyst nanoparticles in the cathode catalyst layer (CL). Degradation of catalyst is critical in consequence of several mechanisms, among which Platinum dissolution. As proposed in the literature, a possible strategy to mitigate Platinum dissolution consists in the development of CLs with gradient properties. In the present work, a theoretical analysis of Platinum dissolution is applied to the interpretation of degradation data recorded under accelerated stress tests (AST) on catalyst-coated membranes (CCMs) with 25 cm2 active area and low Pt loading. A transient model referenced to the literature has been calibrated and validated on a set of experimental data to get insight into the catalyst degradation. The model predicts the formation of a catalyst depleted zone near the interface with polymer membrane, in agreement with TEM observations and the effect of a gradient catalyst structure in the catalyst layer is analyzed.
KW - PEMFC
KW - Platinum dissolution
KW - degradation modelling
KW - impedance spectroscopy
UR - http://www.scopus.com/inward/record.url?scp=85173564956&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:85173564956
T3 - EFC 2017 - Proceedings of the 7th European Fuel Cell Piero Lunghi Conference
SP - 107
EP - 108
BT - EFC 2017 - Proceedings of the 7th European Fuel Cell Piero Lunghi Conference
A2 - Cigolotti, Viviana
A2 - Barchiesi, Chiara
A2 - Chianella, Michela
PB - ENEA
T2 - 7th European Fuel Cell Piero Lunghi Conference, EFC 2017
Y2 - 12 December 2017 through 15 December 2017
ER -
