2005 Volume 71 Issue 712 Pages 3025-3030
Over voltages and internal leak current density in PEFC were analyzed by FFT impedance method. Results showed that the conventional coefficient of Butler·Volmer's equation was twice as theoretical one. The coefficient measured by FFT impedance method was corresponding to the theoretical one. Measured internal leak current density in PEFC is 7.5 mA/cm2, and it reduces output voltage from 3 to 13 mV. Sum of the over voltages by the leak current and the known is 20-30%lower than Nernstian theoretical potential. Analysis and improvement of the unknown over voltages such as mixed potential and so on, will make big performance increase in PEFC.
Transactions of the Society of Mechanical Engineers
Transactions of the Japan Society of Mechanical Engineers
Transactions of the Japan Society of Mechanical Engineers Series A
TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series C
TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series B
TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series A
Transactions of the Japan Society of Mechanical Engineers Series C
