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Probing and Mapping Electrode Surfaces in Solid Oxide Fuel Cells

Probing and Mapping Electrode Surfaces in Solid Oxide Fuel Cells

Published on: September 20, 2012

LaCrO₃-CeO₂-Based Nanocomposite Electrodes for Efficient Symmetrical Solid Oxide Fuel Cells.

Javier Zamudio-García¹, José M Porras-Vázquez¹, Enrique R Losilla¹

¹Departamento de Química Inorgánica, Universidad de Málaga, Campus de Teatinos s/n, 29071 Málaga, Spain.

ACS Applied Energy Materials

|October 3, 2022

Summary

Highly conductive nanocomposite electrodes for solid oxide fuel cells (SOFCs) were developed using a single-step spray-pyrolysis method. The optimized La_0.98Cr_0.75Mn_0.25O_3-δ-Ce_0.9Gd_0.1O_1.95 (LCM-CGO) material exhibits excellent performance as both air and fuel electrodes.

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Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications

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Last Updated: Aug 26, 2025

Probing and Mapping Electrode Surfaces in Solid Oxide Fuel Cells

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Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications

Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications

Published on: August 12, 2013

Area of Science:

Materials Science
Electrochemistry
Energy Conversion

Background:

Solid oxide fuel cells (SOFCs) require efficient and durable electrode materials for optimal performance.
Developing symmetrical electrodes that function effectively as both air and fuel electrodes is crucial for SOFC technology advancement.

Purpose of the Study:

To synthesize and evaluate La_0.98Cr_0.75Mn_0.25O_3-δ-Ce_0.9Gd_0.1O_1.95 (LCM-CGO) nanocomposite layers as symmetrical electrodes for SOFCs.
To investigate the effect of LCM content on the microstructure and electrochemical properties of the LCM-CGO nanocomposite.

Main Methods:

Single-step spray-pyrolysis deposition to prepare LCM-CGO nanocomposite layers with varying LCM content (40-60 wt %).
Structural and microstructural characterization using various techniques to confirm phase formation and analyze grain size.
Electrochemical performance evaluation, including polarization resistance measurements in air and H₂ at 750 °C.

Main Results:

The formation of both fluorite (CGO) and perovskite (LCM) phases was confirmed, with an intimate mixture that inhibited grain growth.
The LCM-CGO nanocomposite retained a nanoscale microstructure (grain size < 50 nm) even after annealing at 1000 °C.
The 50 wt % LCM-CGO electrode demonstrated superior electrochemical properties, with significantly lower polarization resistance (0.29 Ω cm² in air, 0.09 Ω cm² in H₂) compared to screen-printed electrodes.

Conclusions:

The synergetic effect of nanosized LCM (electronic conductivity) and CGO (ionic conductivity) creates highly efficient and durable symmetrical electrodes.
The spray-pyrolysis method enables the direct formation of a nanoscale electrode microstructure on the electrolyte, leading to outstanding electrochemical performance.
Combining immiscible phases with distinct properties is a promising strategy for designing advanced SOFC electrodes.