Abstract
Improvement in long-term stability and cathodic activity of La 0.4Ba0.6CoO3 (BLC) was studied by mixing with La0.6Sr0.4Co0.2Fe0.8O3 (LSCF). LSCF exhibits good long-term stability; however, surface activity is not high like Co-based perovskite. On the other hand, the cathodic activity of BLC is high; however, long-term stability was not so good and large degradation at initial period is observed. Combination of the two oxides shows small overpotential as well as improved long-term stability. Effects of BLC/LSCF ratio on stability and overpotential were studied and it was found that BLC-LSCF (7:3) showed the most stable and small cathodic overpotential among the examined compositions. Although the power density was still slightly decreased over 24 h at 0.5 V terminal voltage, the maximum powder density of the cell using BLC-LSCF composite oxides for cathode shows 2.5 times larger than that of the cell using LSCF cathode and 1.06 times larger than that of BLC. Degradation rate is smaller than 4 % from 5 to 24 h on this BLC-LSCF cathode at current density as high as 682 mA/cm2 after 24 h operation.
| Original language | English |
|---|---|
| Pages (from-to) | 2251-2258 |
| Number of pages | 8 |
| Journal | Journal of Solid State Electrochemistry |
| Volume | 17 |
| Issue number | 8 |
| DOIs | |
| Publication status | Published - Aug 1 2013 |
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All Science Journal Classification (ASJC) codes
- Materials Science(all)
- Condensed Matter Physics
- Electrochemistry
- Electrical and Electronic Engineering
Cite this
Improvement in stability of La0.4Ba0.6CoO3 cathode by combination with La0.6Sr0.4Co 0.2Fe0.8O3 for intermediate temperature-solid oxide fuel cells. / Xie, Jing; Ju, Young Wan; Sakai, Takaaki; Ishihara, Tatsumi.
In: Journal of Solid State Electrochemistry, Vol. 17, No. 8, 01.08.2013, p. 2251-2258.Research output: Contribution to journal › Article
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TY - JOUR
T1 - Improvement in stability of La0.4Ba0.6CoO3 cathode by combination with La0.6Sr0.4Co 0.2Fe0.8O3 for intermediate temperature-solid oxide fuel cells
AU - Xie, Jing
AU - Ju, Young Wan
AU - Sakai, Takaaki
AU - Ishihara, Tatsumi
PY - 2013/8/1
Y1 - 2013/8/1
N2 - Improvement in long-term stability and cathodic activity of La 0.4Ba0.6CoO3 (BLC) was studied by mixing with La0.6Sr0.4Co0.2Fe0.8O3 (LSCF). LSCF exhibits good long-term stability; however, surface activity is not high like Co-based perovskite. On the other hand, the cathodic activity of BLC is high; however, long-term stability was not so good and large degradation at initial period is observed. Combination of the two oxides shows small overpotential as well as improved long-term stability. Effects of BLC/LSCF ratio on stability and overpotential were studied and it was found that BLC-LSCF (7:3) showed the most stable and small cathodic overpotential among the examined compositions. Although the power density was still slightly decreased over 24 h at 0.5 V terminal voltage, the maximum powder density of the cell using BLC-LSCF composite oxides for cathode shows 2.5 times larger than that of the cell using LSCF cathode and 1.06 times larger than that of BLC. Degradation rate is smaller than 4 % from 5 to 24 h on this BLC-LSCF cathode at current density as high as 682 mA/cm2 after 24 h operation.
AB - Improvement in long-term stability and cathodic activity of La 0.4Ba0.6CoO3 (BLC) was studied by mixing with La0.6Sr0.4Co0.2Fe0.8O3 (LSCF). LSCF exhibits good long-term stability; however, surface activity is not high like Co-based perovskite. On the other hand, the cathodic activity of BLC is high; however, long-term stability was not so good and large degradation at initial period is observed. Combination of the two oxides shows small overpotential as well as improved long-term stability. Effects of BLC/LSCF ratio on stability and overpotential were studied and it was found that BLC-LSCF (7:3) showed the most stable and small cathodic overpotential among the examined compositions. Although the power density was still slightly decreased over 24 h at 0.5 V terminal voltage, the maximum powder density of the cell using BLC-LSCF composite oxides for cathode shows 2.5 times larger than that of the cell using LSCF cathode and 1.06 times larger than that of BLC. Degradation rate is smaller than 4 % from 5 to 24 h on this BLC-LSCF cathode at current density as high as 682 mA/cm2 after 24 h operation.
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U2 - 10.1007/s10008-013-2087-2
DO - 10.1007/s10008-013-2087-2
M3 - Article
AN - SCOPUS:84881096574
VL - 17
SP - 2251
EP - 2258
JO - Journal of Solid State Electrochemistry
JF - Journal of Solid State Electrochemistry
SN - 1432-8488
IS - 8
ER -