Catalytic activity of LaLi0.1Co0.1Fe0.8O3-d cathode in (Li0.62K0.38)2CO3 melt. Part I. Experimental results and equivalent circuit for oxide – melt boundary

The results of the study of kinetics of oxygen reduction on the dense LaLi_0.1Co_0.1Fe_0.8O_3-d electrode in (Li_0.62K_0.38)₂CO₃ eutectic melt using coulostatic technique are reported. It was found, that the equivalent circuit that includes heterogeneous charge transfer step in series with heterogeneous chemical reaction most closely fits the kinetics of electrode processes.

Authors:

Vecherskii Sergei Ivanovich, Institute of high-temperature Electrochemistry UB of RAS, 20, Akademicheskaya St., Yekaterinburg, 620990, vecherskii@ihte.uran.ru

Konopel'ko Maksim Alekseevich, Institute of high-temperature Electrochemistry UB of RAS, 20, Akademicheskaya St., Yekaterinburg, 620990, konopelko@ihte.uran.ru

Batalov Nikolai Nikolaevich, Institute of high-temperature Electrochemistry UB of RAS, 20, Akademicheskaya St., Yekaterinburg, 620990, batalov@ihim.uran.ru

Key words:

MCFC, carbonate melt, oxygen electrode, perovskite, equivalent circuit, catalytic activity

Literature

1. Makkus R.C., Hemmes K., de Wit J.H.W. J. Electrochem. Soc. 1994, vol. 141, no. 12, pp. 3429–3438.
2. Fontes E., Lagergren C., Simonsson D. Journal of Electroanalytical Chemistry, 1997, vol. 432, pp. 121–128.
3. Baumgartner C. E., Arendt R. H., Iacovangelo C. D., Karas B. R. J. Electrochem. Soc., 1984, vol. 131, no. 10, pp. 2217–2221.
4. Bychin V. P., Konopel'ko M. A., Molchanova N. G. Russian J. Electrochem, 1997, vol. 33, no. 12, pp. 1320–1323.
5. Vecherskii S. I., Batalov N. N., Konopel'ko M. A., Aleksanlrov K. A., Esina N. O. Toplivnye jelementy i jenergoustanovki na ih osnove: Tez. dokl. III Vserossijskogo seminara s mezhdunarodnym uchasti-em.-Ekaterinburg: Izd-vo Ural. un-ta, 2006, s. 104–106.
6. Vecherskii S. I., Batalov N. N., Konopel'ko M. A., Esina N. O. Toplivnye jelementy i jenergoustanovki na ih osnove: Tez. dokl. III Vserossijskogo seminara s mezhdunarodnym uchasti-em.-Ekaterinburg: Izd-vo Ural. un-ta, 2006, s. 49–52.
7. Vecherskii S. I., Batalov N. N., Esina N. O., Shekhtman G. Sh. Physics of the Solid State, 2003, vol. 45, no. 9, pp. 1648–1654.
8. Vecherskii S. I., Tabatchikova S. N., Antonov B. D., Biryukov V. A. Jelektrohimicheskaja jenergetika. 2010. vol. 10, no. 4, s. 161–169 (in Russian).
9. Vecherskii S. I., Tabatchikova S. N., Antonov B. D., Biryukov V. A. Inorganic Materials, 2011, vol. 47, no. 12, pp. 1356–1360.
10. Damaskin B. B., Petrij O. A. Vvedenie v jelektrohimicheskuju kinetiku. M., Vyssh. shkola, 1983, 400 s.
11. Vecherskii S. I., Konopel'ko M. A., Batalov N. N. Jelektrohimicheskaja jenergetika. 2011, vol. 11, no. 3, s. 120–127.
12. Delahay P. J. Phys. Chem., 1962, vol. 66, pp. 2204–2207.
13. Damaskin B. B. Principy sovremennyh metodov izuchenija jelektrohimicheskih reakcij, M., izd-vo. Mosk. un-ta, 1965, 104 s.
14. Lavrent'ev M. A., Shabat B. V. Metody teorii funkcij kom-pleksnogo peremennogo, M, Nauka, 1973, 736 s.
15. Uchida I., Nishina T., Mugikura Y., Itaya K. J. Electroanal. Chem., 1986, vol. 209, pp. 125–133.
16. Wilemski G. J. Electrochem. Soc., 1983, vol. 130, no. 1, pp. 117–121.
17. Bychin V. P., Chupakhin E. O., Batalov N. N. Russian J. Electrochem., 1996, vol. 32, no. 3, pp. 365–369.
18. Electroanalytical Methods. Guide to Experiments and Applications / edited by F. Scholz. – Berlin, Heidelberg: Springer-Verlag, 2002, M, BINOM. Laboratorija znanij, 2006, 326 s.
19. Prins-Jansen J. A., Hemmes K., de Wit J. H. W. Electrochimica Acta, 1997, vol. 42, no. 23–24, pp. 3585–3600.

Journal issue:

2014. Т. 14, № 1,

Heading:

Fuel cells

DOI:

https://doi.org/10.18500/1608-4039-2014-14-1-11-18

Full Text (PDF):

download

(downloads: 55)