Abstract
The electrical conductivity and electrochemical performance of a La0.6Sr0.4CoO3-δ (LSC) cathode produced by a modified citrate-EDTA sol-gel method assisted with activated carbon are characterized for a proton-conducting solid oxide fuel cell (H+ −SOFC) application at intermediate temperature. Thermogravimetric analysis revealed that the decomposition of the unrequired intermediate compounds in the precalcined powder was completed at 800 °C. A single LSC perovskite phase was formed at a calcination temperature of 900 °C, as confirmed by X-ray diffraction analysis. The particle size, crystallite size, and BET-specific surface area of the powder are 219–221 nm, 18 nm, and 9.87 m2 g−1, respectively. The high index value of the extent of agglomeration (5.53) showed that the powder was barely agglomerated. Bulk LSC sintered at 1200 °C for 2 h showed the highest direct-current electrical conductivity (σd.c) compared to that of bulk LSC sintered at 1000 °C and 1100 °C. The value of σd.c was affected by the density and porosity of the sintered samples. The area specific resistance (ASR) of screen-printed LSC working on a proton conductor of BaCe0.54Zr0.36Y0.1O2.95 (BCZY) decreased from 5.0 Ω cm2–0.06 Ω cm2 as the temperature increased from 500 °C to 800 °C with an activation energy of 1.079 eV. Overall, in this work, the LSC material produced with the aid of activated carbon meet the requirements for the application as a cathode in an intermediate temperature H+-SOFC. [Figure not available: see fulltext.].
| Original language | English |
|---|---|
| Pages (from-to) | 617-630 |
| Number of pages | 14 |
| Journal | Journal of Sol-Gel Science and Technology |
| Volume | 86 |
| Issue number | 3 |
| DOIs | |
| Publication status | Published - 1 Jun 2018 |
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Keywords
- Activated carbon
- Electrical properties
- LSC cathode
- Sol-gel
- Solid oxide fuel cell
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Ceramics and Composites
- Chemistry(all)
- Biomaterials
- Condensed Matter Physics
- Materials Chemistry
Cite this
Electrical and electrochemical characteristics of La0.6Sr0.4CoO3-δ cathode materials synthesized by a modified citrate-EDTA sol-gel method assisted with activated carbon for proton-conducting solid oxide fuel cell application. / Samat, Abdullah Abdul; Jais, Abdul Azim; Somalu, Mahendra Rao; Osman, Nafisah; Muchtar, Andanastuti; Lim, Kean Long.
In: Journal of Sol-Gel Science and Technology, Vol. 86, No. 3, 01.06.2018, p. 617-630.Research output: Contribution to journal › Article
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TY - JOUR
T1 - Electrical and electrochemical characteristics of La0.6Sr0.4CoO3-δ cathode materials synthesized by a modified citrate-EDTA sol-gel method assisted with activated carbon for proton-conducting solid oxide fuel cell application
AU - Samat, Abdullah Abdul
AU - Jais, Abdul Azim
AU - Somalu, Mahendra Rao
AU - Osman, Nafisah
AU - Muchtar, Andanastuti
AU - Lim, Kean Long
PY - 2018/6/1
Y1 - 2018/6/1
N2 - The electrical conductivity and electrochemical performance of a La0.6Sr0.4CoO3-δ (LSC) cathode produced by a modified citrate-EDTA sol-gel method assisted with activated carbon are characterized for a proton-conducting solid oxide fuel cell (H+ −SOFC) application at intermediate temperature. Thermogravimetric analysis revealed that the decomposition of the unrequired intermediate compounds in the precalcined powder was completed at 800 °C. A single LSC perovskite phase was formed at a calcination temperature of 900 °C, as confirmed by X-ray diffraction analysis. The particle size, crystallite size, and BET-specific surface area of the powder are 219–221 nm, 18 nm, and 9.87 m2 g−1, respectively. The high index value of the extent of agglomeration (5.53) showed that the powder was barely agglomerated. Bulk LSC sintered at 1200 °C for 2 h showed the highest direct-current electrical conductivity (σd.c) compared to that of bulk LSC sintered at 1000 °C and 1100 °C. The value of σd.c was affected by the density and porosity of the sintered samples. The area specific resistance (ASR) of screen-printed LSC working on a proton conductor of BaCe0.54Zr0.36Y0.1O2.95 (BCZY) decreased from 5.0 Ω cm2–0.06 Ω cm2 as the temperature increased from 500 °C to 800 °C with an activation energy of 1.079 eV. Overall, in this work, the LSC material produced with the aid of activated carbon meet the requirements for the application as a cathode in an intermediate temperature H+-SOFC. [Figure not available: see fulltext.].
AB - The electrical conductivity and electrochemical performance of a La0.6Sr0.4CoO3-δ (LSC) cathode produced by a modified citrate-EDTA sol-gel method assisted with activated carbon are characterized for a proton-conducting solid oxide fuel cell (H+ −SOFC) application at intermediate temperature. Thermogravimetric analysis revealed that the decomposition of the unrequired intermediate compounds in the precalcined powder was completed at 800 °C. A single LSC perovskite phase was formed at a calcination temperature of 900 °C, as confirmed by X-ray diffraction analysis. The particle size, crystallite size, and BET-specific surface area of the powder are 219–221 nm, 18 nm, and 9.87 m2 g−1, respectively. The high index value of the extent of agglomeration (5.53) showed that the powder was barely agglomerated. Bulk LSC sintered at 1200 °C for 2 h showed the highest direct-current electrical conductivity (σd.c) compared to that of bulk LSC sintered at 1000 °C and 1100 °C. The value of σd.c was affected by the density and porosity of the sintered samples. The area specific resistance (ASR) of screen-printed LSC working on a proton conductor of BaCe0.54Zr0.36Y0.1O2.95 (BCZY) decreased from 5.0 Ω cm2–0.06 Ω cm2 as the temperature increased from 500 °C to 800 °C with an activation energy of 1.079 eV. Overall, in this work, the LSC material produced with the aid of activated carbon meet the requirements for the application as a cathode in an intermediate temperature H+-SOFC. [Figure not available: see fulltext.].
KW - Activated carbon
KW - Electrical properties
KW - LSC cathode
KW - Sol-gel
KW - Solid oxide fuel cell
UR - http://www.scopus.com/inward/record.url?scp=85047146214&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85047146214&partnerID=8YFLogxK
U2 - 10.1007/s10971-018-4675-1
DO - 10.1007/s10971-018-4675-1
M3 - Article
AN - SCOPUS:85047146214
VL - 86
SP - 617
EP - 630
JO - Journal of Sol-Gel Science and Technology
JF - Journal of Sol-Gel Science and Technology
SN - 0928-0707
IS - 3
ER -