Work

Electrochemical Performance and Time Stability of the Solid Oxide Cells with a (La,Sr)(Ga,Fe,Mg)O3−δ Electrolyte and (La,Sr)(Fe,Ga,Mg)O3−δ Electrodes

Year: 2025

Type: article

Abstract: Electrochemical devices on solid electrolytes are closely considered from the point of view of efficient utilization of environmental resources in order to obtain a variety of products, including those with high added cost. This study provides insight into the functionality of electrochemical cells that have been designed with a specific configuration. These cells have the same ionic composition of the anode, cathode, and electrolyte. This was achieved by iron doping of highly conductive (La,Sr)(Ga,Mg)O3−δ electrolyte, and gallium and magnesium doping of the electrode material based on (La,Sr)FeO3−δ. The main focus in this study is on the electrochemical behavior of such cells depending on the oxygen partial pressure in the gas phase, as well as the stability of the electrochemical performance over time for more than 950 h of testing. According to the obtained results, the electrochemical cell with a completely identical ionic composition of electrodes La0.6Sr0.4Fe0.85Ga0.1Mg0.05O3−δ and electrolyte (La0.8Sr0.2)0.98Ga0.7Fe0.1Mg0.2O3−δ demonstrated the best set of optimal performances. This consists of excellent chemical compatibility, high electrochemical activity (0.08 Ω cm2 in air at 800 °C), and a minor degradation rate.

Source: Nanomaterials

DOI: 10.3390/nano15120935

Authors: Egor Gordeev, Ekaterina Antonova, Denis Osinkin

Institutions: Ural Federal University, Ural Branch of the Russian Academy of Sciences, Institute of High Temperature Electrochemistry

Language: English

Topic: Advancements in Solid Oxide Fuel Cells

Subfield: Materials Chemistry

Field: Materials Science

Domain: Physical Sciences

SDG: Affordable and clean energy

Open Access status: gold

Estimated APC paid: $2,896