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Related Experiment Video

Updated: Dec 27, 2025

Elaborate Control of Inkjet Printer for Fabrication of Chip-based Supercapacitors
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Performance optimization of LSCF/Gd:CeO2 composite cathodes via single-step inkjet printing infiltration.

R I Tomov1, Tom Mitchell-Williams1, Chenlong Gao1

  • 11Department of Materials Science and Metallurgy, University of Cambridge, 27 Charles Babbage Road, Cambridge, CB3 0FS UK.

Journal of Applied Electrochemistry
|February 28, 2020
PubMed
Summary

Inkjet printing infiltration enhances solid oxide fuel cell (SOFC) cathode performance by nano-decorating with gadolinium doped ceria. This modification improves electrochemical activity and stability, offering a cost-effective route for SOFC commercialization.

Keywords:
Doped ceriaInfiltrationInkjet printingLanthanum strontium cobaltite ferriteSolid oxide fuel cells

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Chemical Engineering

Background:

  • Solid oxide fuel cells (SOFCs) are promising clean energy conversion devices.
  • Cathode microstructure significantly impacts SOFC electrochemical performance and durability.
  • Current methods for cathode modification can be complex and costly.

Purpose of the Study:

  • To investigate the effect of nano-decoration on SOFC cathode microstructure and electrochemical activity.
  • To explore inkjet printing infiltration as a method for cathode modification.
  • To assess the stability of modified SOFC cathodes.

Main Methods:

  • Fabrication of La0.6Sr0.4Co0.2Fe0.8O3-δ:Ce0.9Gd0.1O1.9 composite cathodes with varying ratios (60:40 and 40:60 vol%) using inkjet printing.
  • Single-step inkjet printing infiltration of Ce0.9Gd0.1O1.9 ink onto cathode scaffolds.
  • Heat treatment at 550 °C in air.
  • Electrochemical impedance spectroscopy (EIS) on symmetrical cells.
  • Long-term ageing tests (up to 60 h) in air.

Main Results:

  • Nano-decoration of cathode surfaces with Ce0.9Gd0.1O1.9 particles (20-120 nm) was achieved.
  • Enhanced active triple phase boundary and oxygen surface exchange kinetics were observed.
  • Polarization resistance was reduced by 1.3 to 2.9 times, particularly in 60:40 vol% cathodes.
  • Infiltrated electrodes showed enhanced stability, suppressing SrO surface segregation during ageing.

Conclusions:

  • Single-step inkjet printing infiltration is an effective method for nano-engineering SOFC cathode microstructures.
  • This approach leads to significant improvements in electrochemical activity and operational stability.
  • The technique offers a reproducible and cost-effective route for commercial SOFC manufacturing.