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Effect of Contact between Electrode and Interconnect on Performance of SOFC Stacks
Author(s) -
Guan W. B.,
Zhai H. J.,
Jin L.,
Li T. S.,
Wang W. G.
Publication year - 2011
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.201000176
Subject(s) - stack (abstract data type) , cathode , materials science , anode , interconnection , electrode , layer (electronics) , current density , optoelectronics , solid oxide fuel cell , current collector , current (fluid) , power density , analytical chemistry (journal) , composite material , electrical engineering , electrolyte , power (physics) , computer science , chemistry , telecommunications , physics , quantum mechanics , programming language , engineering , chromatography
This work investigates the effect of contact between electrodes and alloy interconnects on output performance of solid oxide fuel cell (SOFC) stacks. The measured maximum output power density ( p max ) of the unit cell increases from 0.07 to 0.1 W cm –2 by increasing the tip area of the interconnect from 40 to 60 cm 2 . The p max increases from 0.07 to 0.15 W cm –2 upon the addition of nickel foam and Ag mesh on the anode and cathode side, respectively. An additional (La 0.75 Sr 0.25 ) 0.95 MO 3–σ cathode current collecting layer is re‐printed on the original cathode current collecting layer, which aims to further improve the performance of the stack and individual cell. The performance of a 3‐cell short stack assembled by the cells with a new cathode current collecting layer is evaluated by measuring the current–voltage curve. The results indicate that the p max values of the stack and individual cells are enhanced from 0.07 to 0.37 W cm –2 and 0.15 to 0.5 W cm –2 at 850 °C, respectively. The performance of the whole stack and individual cells is greatly improved due to the interconnect embedded in the re‐printed new cathode current collecting layer.