Abstract
The Ni-yttria-stabilized zirconia (YSZ) anode functional layer in solid oxide fuel cells produced by pulsed laser-deposition was studied using three-dimensional tomography. Anode feature sizes of ∼130 nm were quite small relative to typical anodes, but errors arising in imaging and segmentation were shown using a sensitivity analysis to be acceptable. Electrochemical characterization showed that these cells achieved a relatively high maximum power density of 1.4 W cm-2 with low cell resistance at an operating temperature of 600°C. The tomographic data showed anode three-phase boundary density of ∼56 μm-2, more than 10 times the value observed in conventional Ni-YSZ anodes. Anode polarization resistance values, predicted by combining the structural data and literature values of three-phase boundary resistance in an electrochemical model, were consistent with measured electrochemical impedance spectra, explaining the excellent intermediate- temperature performance of these cells. This journal is
| Original language | English |
|---|---|
| Pages (from-to) | 15249-15255 |
| Number of pages | 7 |
| Journal | Physical Chemistry Chemical Physics |
| Volume | 16 |
| Issue number | 29 |
| DOIs | |
| Publication status | Published - 2014 Aug 7 |
All Science Journal Classification (ASJC) codes
- Physics and Astronomy(all)
- Physical and Theoretical Chemistry