Improved Carbon Corrosion and Platinum Dissolution Durability in Automotive Fuel Cell Startup and Shutdown Operation | Zendy

Chunmei Wang | Zendy; Mark Ricketts | Zendy; Amir Peyman Soleymani | Zendy; Jasna Janković | Zendy; James Waldecker | Zendy; Jixin Chen | Zendy; Chunchuan Xu | Zendy

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Improved Carbon Corrosion and Platinum Dissolution Durability in Automotive Fuel Cell Startup and Shutdown Operation

Author(s) -

Chunmei Wang,

Mark Ricketts,

Amir Peyman Soleymani,

Jasna Janković,

James Waldecker,

Jixin Chen,

Chunchuan Xu

Publication year - 2021

Publication title -

journal of the electrochemical society

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.258

H-Index - 271

eISSN - 1945-7111

pISSN - 0013-4651

DOI - 10.1149/1945-7111/abe6ea

Subject(s) - shutdown , durability , hydrogen , materials science , degradation (telecommunications) , anode , corrosion , electrochemistry , catalysis , environmental science , chemical engineering , waste management , nuclear engineering , nuclear chemistry , composite material , chemistry , engineering , electrical engineering , electrode , biochemistry , organic chemistry

Three protocols of accelerated startup and shutdown (SU/SD) test were investigated: startup and shutdown with air supply and soak to both anode and cathode (air-SU/SD), hydrogen protected startup and shutdown (H 2 -SU/SD), and hydrogen protected startup and shutdown with a load (H 2 -SU/SD with a load). The performance losses, electrochemical surface area (ECSA) reduction, and catalyst layer degradation were characterized and compared for these SU/SD protocols. Air-SU/SD protocol showed much more severe performance loss and catalyst layer degradation than hydrogen protected ones, which confirmed the benefits of hydrogen protection. The temperature effect on air-SU/SD was significant in a broad range from 20 °C to 70 °C, with low temperature greatly reducing the degradation. The mechanism of H 2 protection and load drawn in alleviating carbon corrosion was explained based on reactions and charge conservation during SU/SD. This paper provides comprehensive test data and failure analysis to quantify the benefits of H 2 protection and load drawn and to facilitate future enhancement of system strategies on SU/SD durability.

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