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Long Term Testing in Continuous Mode of HT‐PEMFC Based H 3 PO 4 /PBI Celtec‐P MEAs for μ‐CHP Applications
Author(s) -
Moçotéguy Ph.,
Ludwig B.,
Scholta J.,
Barrera R.,
Ginocchio S.
Publication year - 2009
Publication title -
fuel cells
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.485
H-Index - 69
eISSN - 1615-6854
pISSN - 1615-6846
DOI - 10.1002/fuce.200800134
Subject(s) - stack (abstract data type) , anode , ohmic contact , cathodic protection , materials science , electrochemistry , proton exchange membrane fuel cell , platinum , electrical resistivity and conductivity , analytical chemistry (journal) , fuel cells , chemical engineering , chemistry , electrode , composite material , chromatography , electrical engineering , layer (electronics) , computer science , catalysis , biochemistry , programming language , engineering
Single cell and 500 We stack integrating Celtec P1000 MEAs were operated in continuous mode at 0.4 A cm –2 and 160 °C, under simulated reformate and air. Single cell's ohmic resistivity was almost unaffected by 1,100 h of ageing but the cell progressively switched from a cathodic to an anodic mass transfer limited operation. The stack was operated for 658 h, exhibiting the same behaviour and an additional increase in cell voltage distribution heterogeneity. CO 2 proved to have negligible effect on performances but performance losses induced by ageing are doubled in the presence of CO. Post‐testing experiments revealed that anode electrochemical active area was dramatically decreased and that platinum content was also decreased. Finally, results showed that a convenient shut‐down procedure could prevent or limit degradations associated with storage.