Cathodic Polarization Measurements on La0.9Sr0.1MnO3 Electrode for Solid Oxide Fuel Cells

Lee HY; Oh SM

Journal of the Korean Industrial and Engineering Chemistry, Vol.4, No.1, 153-161, March, 1993

Export Citation

Cathodic Polarization Measurements on La0.9Sr0.1MnO3 Electrode for Solid Oxide Fuel Cells

Cathodic Polarization Measurements on La_0.9Sr_0.1,MnO₃ Electrode for Solid Oxide Fuel Cells

Lee HY, Oh SM

초록

700-900℃의 온도범위와 여러 산소분압 조건에서 고체전해질 연료전지의 양극인 La_0.9Sr_0.1,MnO₃에서 산소의 환원반응특성을 조사하였다. AC 임피던스법과 전류중단법에 의해 산소환원반응의 전하전달저항을 측정하였는데 두 방법으로 구한 간이 서로 잘 일치하였다. 전기화학적 산소환원반응의 활성화에너지는 대기압 조건에서 174kJ/mo1의 값을 보였고, 산소분압에 따른 전하전달저항의 측정결과로 부터 이 전극에서 전기화학적 산소환원반응의 율속단계는 전하전달과정임을 알 수 있었다.

Cathodic oxygen reduction kinetics on La_0.9Sr_0.1,MnO₃ electrode have been examined at 700-900℃ under various oxygen partial pressures. AC impedance and current interruption techniques were employed for the determination of charge transfer resistances for electrochemical oxygen reduction. The R_ct values obtained from two different methods were very close each other for La_0.9Sr_0.1,MnO₃ electrode. Activation energy for the electrochemical oxygen reduction was found to be 174kJ/mo1 under atmospheric oxygen pressure. R_ct measurements as a function of oxygen partial pressure indicate that the rate-determining step for the electrochemical oxygen reduction on La_0.9Sr_0.1,MnO₃ electrode is the charge transfer process.

[References]

Gopel W, Wiemhofer HD, Ber. Bunsenges. Phys. Chem., 94, 981 (1990)
Hammou A, Proc. Inter. Seminar on Solid State Ionic Devices, Singapore, pp. 243-263 (1988)
Yamamoto O, Takeda Y, Kanno R, Noda M, Solid State Ion., 22, 241 (1987)
Takeda Y, Kanno R, Noda M, Tomida Y, Yamamoto O, J. Electrochem. Soc., 134, 2656 (1987)
Steele BCH, Kelly IE, Middleton PH, Rudkin RA, Solid State Ion., 28-30, 1547 (1988)
Hammouche A, Siebert E, Hammou A, Mater. Res. Bull., 24, 367 (1989)
Kenjo T, Horiuchi Y, Osawa S, J. Electrochem. Soc., 137, 24243 (1990)
Hammouche A, Siebert E, Hammou A, Kleitz M, J. Electrochem. Soc., 138, 1212 (1991)
Mizusaki J, Tagawa H, Proc. Intern. Symp. on SOFCs, Nagoya (1989)
Mizausaki J, Tagawa H, Tsuneyoshi K, Sawata A, J. Electrochem. Soc., 138, 1867 (1991)
Fabry P, Kleitz M, J. Electroanal. Chem., 57, 165 (1974)
Wang DY, Nowick AS, J. Electrochem. Soc., 126, 1155 (1979)
Kuzin BL, Komarov MA, Solid State Ion., 39, 163 (1990)
Wang DY, Solid State Ion., 40-41, 849 (1990)
Inoue T, Seki N, Eguchi K, Arai H, J. Electrochem. Soc., 137, 2523 (1990)
Velle OJ, Norby T, Kofstad P, Solid State Ion., 47, 161 (1991)
Ohno Y, Nagata S, Sato H, Solid State Ion., 9-10, 1001 (1983)
Raistrick ID, MacDonald JR, Franceschetti DR, "Impedance Spectroscopy," ed. J.R. MacDonald, Wiley & Sons, New York, chap. 2 (1987)
Bauerle JE, J. Phys. Chem. Solids, 30, 2657 (1969)
Sasaki J, Mizusaki J, Yamauchi S, Fueki K, Bull. Chem. Soc. Jpn., 54, 1688 (1981)
Inoue T, Eguchi K, Setoguchi T, Arai H, Solid State Ion., 40-41, 407 (1990)
Hughes AE, Badwal SPS, Solid State Ion., 40-41, 312 (1990)

[1] Gopel W, Wiemhofer HD, Ber. Bunsenges. Phys. Chem., 94, 981 (1990)

[2] Hammou A, Proc. Inter. Seminar on Solid State Ionic Devices, Singapore, pp. 243-263 (1988)

[3] Yamamoto O, Takeda Y, Kanno R, Noda M, Solid State Ion., 22, 241 (1987)

[4] Takeda Y, Kanno R, Noda M, Tomida Y, Yamamoto O, J. Electrochem. Soc., 134, 2656 (1987)

[5] Steele BCH, Kelly IE, Middleton PH, Rudkin RA, Solid State Ion., 28-30, 1547 (1988)

[6] Hammouche A, Siebert E, Hammou A, Mater. Res. Bull., 24, 367 (1989)

[7] Kenjo T, Horiuchi Y, Osawa S, J. Electrochem. Soc., 137, 24243 (1990)

[8] Hammouche A, Siebert E, Hammou A, Kleitz M, J. Electrochem. Soc., 138, 1212 (1991)

[9] Mizusaki J, Tagawa H, Proc. Intern. Symp. on SOFCs, Nagoya (1989)

[10] Mizausaki J, Tagawa H, Tsuneyoshi K, Sawata A, J. Electrochem. Soc., 138, 1867 (1991)

[11] Fabry P, Kleitz M, J. Electroanal. Chem., 57, 165 (1974)

[12] Wang DY, Nowick AS, J. Electrochem. Soc., 126, 1155 (1979)

[13] Kuzin BL, Komarov MA, Solid State Ion., 39, 163 (1990)

[14] Wang DY, Solid State Ion., 40-41, 849 (1990)

[15] Inoue T, Seki N, Eguchi K, Arai H, J. Electrochem. Soc., 137, 2523 (1990)

[16] Velle OJ, Norby T, Kofstad P, Solid State Ion., 47, 161 (1991)

[17] Ohno Y, Nagata S, Sato H, Solid State Ion., 9-10, 1001 (1983)

[18] Raistrick ID, MacDonald JR, Franceschetti DR, "Impedance Spectroscopy," ed. J.R. MacDonald, Wiley & Sons, New York, chap. 2 (1987)

[19] Bauerle JE, J. Phys. Chem. Solids, 30, 2657 (1969)

[20] Sasaki J, Mizusaki J, Yamauchi S, Fueki K, Bull. Chem. Soc. Jpn., 54, 1688 (1981)

[21] Inoue T, Eguchi K, Setoguchi T, Arai H, Solid State Ion., 40-41, 407 (1990)

[22] Hughes AE, Badwal SPS, Solid State Ion., 40-41, 312 (1990)