Ulrich P. Muecke, Kojiro Akiba
Nickel oxide/Ce0.8Gd0.2O1.9 −x (NiO/CGO) films were deposited by spray pyrolysis and pulsed laser deposition on polished CGO electrolyte pellets to analyze their electrochemical performance as anodes in solid oxide fuel cells (SOFCs). The objective was to evaluate the relationship between microstructure and performance of Ni/CGO thin film anodes. The thickness of the as-deposited films ranged from 500 to 800 nm. After annealing in air, the sprayed films exhibited a homogeneously distributed nano-grain sized microstructure, while the PLD films showed elongated columnar grains. Measurements were conducted in a symmetrical anode/electrolyte/anode configuration using impedance spectroscopy under a single gas atmosphere. The results indicated a significant decrease in polarization resistance for the 60/40 vol.% Ni/CGO spray pyrolysis films with decreasing grain size, reaching values as low as 0.34Ω·cm² at 600 °C. The activation energies were determined to be 1.45 eV and 1.44 eV for different grain sizes. The performance of the 49/51 vol.% Ni/CGO PLD cermet film was comparable, demonstrating potential for use in micro SOFCs as effective electrodes.
@article{fed9d56f-ca25-469e-84b9-b31d94b039ed,
title={Electrochemical performance of nanocrystalline nickel/gadolinia-doped ceria thin film anodes for solid oxide fuel cells},
author={Ulrich P. Muecke and Kojiro Akiba},
year={2007},
language={en}
}TY - JOUR TI - Electrochemical performance of nanocrystalline nickel/gadolinia-doped ceria thin film anodes for solid oxide fuel cells AU - Ulrich P. Muecke AU - Kojiro Akiba PY - 2007 LA - en ER -
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