Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7738080 | Journal of Power Sources | 2014 | 6 Pages |
Abstract
The redox behaviors of Ni-gadolinia doped ceria (GDC) anodes with different compositions and microstructures were investigated. When the NiO-GDC composite particles prepared by spray pyrolysis were used for an anode (SP-cells), the decrease of the cell voltage during the redox cycles was smaller than that of the cell with anode using the mixed powder of NiO and GDC (Mix-cells). Current interruption and AC impedance measurements were examined before redox cycle, after 1st redox cycle, and after 10th redox cycles. The ohmic and polarization losses after 10th cycles for SP-cells were smaller than those for Mix cells. The morphology changes of the Ni-GDC anodes between before-redox cycle and after-10th redox cycles were observed by scanning electron microscopy (SEM). These results indicate that the use of NiO-GDC composite particles suppressed the excessive agglomerations of nickel grains during the redox cycles.
Related Topics
Physical Sciences and Engineering
Chemistry
Electrochemistry
Authors
Satoshi Hashigami, Hiroyuki Yoshida, Daisuke Ueno, Mitsunobu Kawano, Toru Inagaki,