TY - GEN
T1 - Current distribution analysis of a microtubular solid oxide fuel cell with surface temperature measurements
AU - Nakajima, Hironori
AU - Kitahara, Tatsumi
PY - 2011
Y1 - 2011
N2 - Current distribution of a practical solid oxide fuel cell (SOFC) has been analyzed from a thermal analysis combined with surface temperature measurements. Electrochemical impedance spectroscopy with two-electrode set-up is employed on an anode-supported microtubular SOFC. This cell is an intermediate temperature SOFC composed of Ni/(ZrO 2) 0.9(Y 2O 3) 0.1 cermet anode, La 0.8Sr 0.2Ga 0.8Mg 0.2O 2.8 electrolyte, and (La 0.6SrO 4)(Co 0.2Fe 0.8)O 3 cathode. The impedance spectra give the resistances at the anode and cathode and the cell ohmic resistance. By numerically integrating these resistances, overpotentials are evaluated. The overpotentials and the single electrode (electrochemical) Peltier heats at the anode and cathode provide individual heat production rates. Since the energy balance equations incorporating these heat production rates determined by current yield the surface temperatures of the cell, local current densities are obtained so that the calculated and measured temperatures by thermocouples at several positions in the anode and cathode surfaces coincide.
AB - Current distribution of a practical solid oxide fuel cell (SOFC) has been analyzed from a thermal analysis combined with surface temperature measurements. Electrochemical impedance spectroscopy with two-electrode set-up is employed on an anode-supported microtubular SOFC. This cell is an intermediate temperature SOFC composed of Ni/(ZrO 2) 0.9(Y 2O 3) 0.1 cermet anode, La 0.8Sr 0.2Ga 0.8Mg 0.2O 2.8 electrolyte, and (La 0.6SrO 4)(Co 0.2Fe 0.8)O 3 cathode. The impedance spectra give the resistances at the anode and cathode and the cell ohmic resistance. By numerically integrating these resistances, overpotentials are evaluated. The overpotentials and the single electrode (electrochemical) Peltier heats at the anode and cathode provide individual heat production rates. Since the energy balance equations incorporating these heat production rates determined by current yield the surface temperatures of the cell, local current densities are obtained so that the calculated and measured temperatures by thermocouples at several positions in the anode and cathode surfaces coincide.
UR - http://www.scopus.com/inward/record.url?scp=84856942288&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84856942288&partnerID=8YFLogxK
U2 - 10.1149/1.3570089
DO - 10.1149/1.3570089
M3 - Conference contribution
AN - SCOPUS:84856942288
SN - 9781607682363
T3 - ECS Transactions
SP - 1087
EP - 1096
BT - Solid Oxide Fuel Cells 12, SOFC XII
T2 - 12th International Symposium on Solid Oxide Fuel Cells, SOFC-XII - 219th ECS Meeting
Y2 - 1 May 2011 through 6 May 2011
ER -