Abstract
We synthesized Ba 0.5 Sr 0.5 Co 0.8 Fe 0.2 O 3-δ (BSCF) powders with a primary particle size of 20 nm using a Pechini type method. By using nanocrystalline BSCF powders, we were able to fabricate a ceria interlayer-free nanoporous cathode on a scandia stabilized zirconia (ScSZ) electrolyte at low temperatures. Cathodes sintered below 750 C lacked sufficient mechanical adhesion to the electrolyte, while electrode was well adhered to the electrolyte when fired at 800 C. The symmetrical BSCF-ScSZ|yttria stabilized zirconia (YSZ)|BSCF-ScSZ half-cell that we generated had an exceptionally low polarization resistance of 0.06 Ω·cm 2 at 700 C. The maximum power density of the BSCF-ScSZ|ScSZ|Ni-ScSZ unit cell was over 1 W cm -2 at 700 C. We investigated the durability of the BSCF-ScSZ composite cathode by 30 thermo-cycles performed by varying the temperature from 200 to 700 C. The polarization resistance after the test remained low at less than 0.08 Ω·cm 2 .
| Original language | English |
|---|---|
| Pages (from-to) | 9320-9329 |
| Number of pages | 10 |
| Journal | International Journal of Hydrogen Energy |
| Volume | 38 |
| Issue number | 22 |
| DOIs | |
| Publication status | Published - 2013 Jul 26 |
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All Science Journal Classification (ASJC) codes
- Renewable Energy, Sustainability and the Environment
- Fuel Technology
- Condensed Matter Physics
- Energy Engineering and Power Technology
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Ceria interlayer-free Ba 0.5 Sr 0.5 Co 0.8 Fe 0.2 O 3-δ -Sc 0.1 Zr 0.9 O 1.95 composite cathode on zirconia based electrolyte for intermediate temperature solid oxide fuel cells . / Lee, Seong Oh; Lee, Daehee; Jung, Inyong; Kim, Dongha; Hyun, Sang Hoon; Kim, Joosun; Moon, Joo Ho.
In: International Journal of Hydrogen Energy, Vol. 38, No. 22, 26.07.2013, p. 9320-9329.Research output: Contribution to journal › Article
TY - JOUR
T1 - Ceria interlayer-free Ba 0.5 Sr 0.5 Co 0.8 Fe 0.2 O 3-δ -Sc 0.1 Zr 0.9 O 1.95 composite cathode on zirconia based electrolyte for intermediate temperature solid oxide fuel cells
AU - Lee, Seong Oh
AU - Lee, Daehee
AU - Jung, Inyong
AU - Kim, Dongha
AU - Hyun, Sang Hoon
AU - Kim, Joosun
AU - Moon, Joo Ho
PY - 2013/7/26
Y1 - 2013/7/26
N2 - We synthesized Ba 0.5 Sr 0.5 Co 0.8 Fe 0.2 O 3-δ (BSCF) powders with a primary particle size of 20 nm using a Pechini type method. By using nanocrystalline BSCF powders, we were able to fabricate a ceria interlayer-free nanoporous cathode on a scandia stabilized zirconia (ScSZ) electrolyte at low temperatures. Cathodes sintered below 750 C lacked sufficient mechanical adhesion to the electrolyte, while electrode was well adhered to the electrolyte when fired at 800 C. The symmetrical BSCF-ScSZ|yttria stabilized zirconia (YSZ)|BSCF-ScSZ half-cell that we generated had an exceptionally low polarization resistance of 0.06 Ω·cm 2 at 700 C. The maximum power density of the BSCF-ScSZ|ScSZ|Ni-ScSZ unit cell was over 1 W cm -2 at 700 C. We investigated the durability of the BSCF-ScSZ composite cathode by 30 thermo-cycles performed by varying the temperature from 200 to 700 C. The polarization resistance after the test remained low at less than 0.08 Ω·cm 2 .
AB - We synthesized Ba 0.5 Sr 0.5 Co 0.8 Fe 0.2 O 3-δ (BSCF) powders with a primary particle size of 20 nm using a Pechini type method. By using nanocrystalline BSCF powders, we were able to fabricate a ceria interlayer-free nanoporous cathode on a scandia stabilized zirconia (ScSZ) electrolyte at low temperatures. Cathodes sintered below 750 C lacked sufficient mechanical adhesion to the electrolyte, while electrode was well adhered to the electrolyte when fired at 800 C. The symmetrical BSCF-ScSZ|yttria stabilized zirconia (YSZ)|BSCF-ScSZ half-cell that we generated had an exceptionally low polarization resistance of 0.06 Ω·cm 2 at 700 C. The maximum power density of the BSCF-ScSZ|ScSZ|Ni-ScSZ unit cell was over 1 W cm -2 at 700 C. We investigated the durability of the BSCF-ScSZ composite cathode by 30 thermo-cycles performed by varying the temperature from 200 to 700 C. The polarization resistance after the test remained low at less than 0.08 Ω·cm 2 .
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U2 - 10.1016/j.ijhydene.2013.05.048
DO - 10.1016/j.ijhydene.2013.05.048
M3 - Article
VL - 38
SP - 9320
EP - 9329
JO - International Journal of Hydrogen Energy
JF - International Journal of Hydrogen Energy
SN - 0360-3199
IS - 22
ER -