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A battery is a galvanic cell that is used as a source of electrical power for specific applications. Modern batteries exist in a multitude of forms to accommodate various applications, from tiny button batteries such as those that power wristwatches to the very large batteries used to supply backup energy to municipal power grids. Some batteries are designed for single-use applications and cannot be recharged (primary cells), while others are based on conveniently reversible cell reactions that...
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Related Experiment Video

Updated: Feb 10, 2026

Probing and Mapping Electrode Surfaces in Solid Oxide Fuel Cells
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High-Performance Solid Oxide Fuel Cell with an Electrochemically Surface-Tailored Oxygen Electrode.

Beom-Kyeong Park1,2, Seung-Bok Lee1, Tak-Hyoung Lim1

  • 1Fuel Cell Laboratory, Korea Institute of Energy Research, 152 Gajeong-ro, Yuseong-gu, Daejeon, 34129, Republic of Korea.

Chemsuschem
|May 30, 2018
PubMed
Summary

Researchers enhanced solid oxide fuel cell (SOFC) cathodes by electrochemically depositing lanthanum cobalt hydroxide (LaCo(OH)x) and converting it to lanthanum cobaltate (LaCoO3) nanoparticles. This surface modification significantly boosts SOFC performance at intermediate temperatures.

Keywords:
electrodepositionenergy conversionperovskite phasessolid oxide fuel cellsurface tailoring

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Energy Conversion

Background:

  • State-of-the-art solid oxide fuel cell (SOFC) cathodes like LSM-YSZ exhibit sluggish oxygen reduction reaction (ORR) kinetics at reduced temperatures, limiting overall performance.
  • Improving ORR kinetics is crucial for enhancing SOFC efficiency and enabling operation at intermediate temperatures.

Purpose of the Study:

  • To develop a novel surface modification strategy for SOFC cathodes to enhance ORR activity at intermediate temperatures.
  • To investigate the effectiveness of chemically assisted electrodeposition (CAED) for creating tailored cathode surfaces.

Main Methods:

  • Chemically assisted electrodeposition (CAED) of lanthanum cobalt hydroxide (LaCo(OH)x) onto LSM-YSZ cathode surfaces.
  • In situ thermal conversion of deposited LaCo(OH)x to perovskite-type LaCoO3 (LCO) nanoparticles during SOFC startup.
  • Fabrication and testing of anode-supported SOFCs with modified and pristine LSM-YSZ cathodes.

Main Results:

  • The LCO-tailored LSM-YSZ cathode demonstrated significantly enhanced ORR activity.
  • SOFCs with the LCO-modified cathode achieved a 180% increase in power density at 700°C compared to pristine cathodes.
  • The modified SOFCs exhibited excellent long-term operational stability.

Conclusions:

  • Surface tailoring of SOFC cathodes using CAED-derived LCO nanoparticles is an effective strategy to improve performance at intermediate temperatures.
  • The enhanced performance is attributed to enlarged active areas for ORR and improved oxygen adsorption/diffusion kinetics.
  • This approach offers a simple and controllable method for optimizing SOFC cathode materials.