PEFCにおける内部漏洩電流が出力電圧に与える影響
開路及び閉路小電流域の内部漏洩電流
2005 年 71 巻 712 号 p. 3025-3030
詳細
2005 年 71 巻 712 号 p. 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.
