Electrochemical properties of doped lantanum–nickelate-based electrodes
- Authors: Kol’chugin A.A.1,2, Pikalova E.Y.1,2, Bogdanovich N.M.1, Bronin D.I.1,2, Filonova E.A.2
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Affiliations:
- Institute of High-Temperature Electrochemistry, Ural Branch
- Ural Federal University
- Issue: Vol 53, No 8 (2017)
- Pages: 826-833
- Section: Article
- URL: https://journals.rcsi.science/1023-1935/article/view/188957
- DOI: https://doi.org/10.1134/S1023193517080110
- ID: 188957
Cite item
Abstract
This work is devoted to the studying of effects of La2NiO4 doping with alkaline-earth elements: Ca, Sr, and Ba (at an amount of 15 mol %) on its structural, electrical, and electrochemical properties. The effects of the alkaline-earth element nature, introduction of the Ce0.8Sm0.2O1.9-electrolyte (SDC) component to the functional layer, and the presence of collecting film onto electrochemical activity of the electrodes contacting the Ce0.8Sm0.2O1.9-electrolyte are examined. The doping was found to increase the La2NiO4 full conductivity due to increase in the hole conductivity. The maximal conductivity (at the sample density of 86–89%) was obtained for the Ca-doped composition: 85 S/сm at 700°C, as compared with 65 S/сm for undoped La2NiO4. at the same time, the doping was found to deteriorate the electrodes’ electrochemical activity which is likely to be due to loss of interstitial oxygen as a result of the doping. The using of composite electrodes allows increasing polarization conductivity markedly. For instance, at 700°С the conductivity of La2NiO4 is 0.25 S/сm2; of its based composite, 0.67 S/сm2.
About the authors
A. A. Kol’chugin
Institute of High-Temperature Electrochemistry, Ural Branch; Ural Federal University
Author for correspondence.
Email: laba50@mail.ru
Russian Federation, ul. Akademicheskaya 20, Yekaterinburg, 620137; ul. Mira 19, Yekaterinburg, 620002
E. Yu. Pikalova
Institute of High-Temperature Electrochemistry, Ural Branch; Ural Federal University
Email: laba50@mail.ru
Russian Federation, ul. Akademicheskaya 20, Yekaterinburg, 620137; ul. Mira 19, Yekaterinburg, 620002
N. M. Bogdanovich
Institute of High-Temperature Electrochemistry, Ural Branch
Email: laba50@mail.ru
Russian Federation, ul. Akademicheskaya 20, Yekaterinburg, 620137
D. I. Bronin
Institute of High-Temperature Electrochemistry, Ural Branch; Ural Federal University
Email: laba50@mail.ru
Russian Federation, ul. Akademicheskaya 20, Yekaterinburg, 620137; ul. Mira 19, Yekaterinburg, 620002
E. A. Filonova
Ural Federal University
Email: laba50@mail.ru
Russian Federation, ul. Mira 19, Yekaterinburg, 620002