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Generation of nanoflowers and nanoneedles on Co-based layered perovskite of IT-SOFC cathode affecting electrical conductivities

Research output: Contribution to Journal/Magazine › Journal article › peer-review

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Generation of nanoflowers and nanoneedles on Co-based layered perovskite of IT-SOFC cathode affecting electrical conductivities. / Im, Ji Min; Song, Kyeong Eun; Schlegl, Harald et al.
In: International Journal of Hydrogen Energy, Vol. 48, No. 90, 09.11.2023, p. 35229-35239.

Research output: Contribution to Journal/Magazine › Journal article › peer-review

Harvard

Im, JM, Song, KE, Schlegl, H, Kang, H, Choi, W, Baek, S-W, Park, J-Y, Kim, H-S & Kim, JH 2023, 'Generation of nanoflowers and nanoneedles on Co-based layered perovskite of IT-SOFC cathode affecting electrical conductivities', International Journal of Hydrogen Energy, vol. 48, no. 90, pp. 35229-35239. https://doi.org/10.1016/j.ijhydene.2023.05.327

APA

Im, J. M., Song, K. E., Schlegl, H., Kang, H., Choi, W., Baek, S-W., Park, J-Y., Kim, H-S., & Kim, J. H. (2023). Generation of nanoflowers and nanoneedles on Co-based layered perovskite of IT-SOFC cathode affecting electrical conductivities. International Journal of Hydrogen Energy, 48(90), 35229-35239. https://doi.org/10.1016/j.ijhydene.2023.05.327

Vancouver

Im JM, Song KE, Schlegl H, Kang H, Choi W, Baek S-W et al. Generation of nanoflowers and nanoneedles on Co-based layered perovskite of IT-SOFC cathode affecting electrical conductivities. International Journal of Hydrogen Energy. 2023 Nov 9;48(90):35229-35239. Epub 2023 Jun 12. doi: 10.1016/j.ijhydene.2023.05.327

Author

Im, Ji Min ; Song, Kyeong Eun ; Schlegl, Harald et al. / Generation of nanoflowers and nanoneedles on Co-based layered perovskite of IT-SOFC cathode affecting electrical conductivities. In: International Journal of Hydrogen Energy. 2023 ; Vol. 48, No. 90. pp. 35229-35239.

Bibtex

@article{e00f5e898ca84d0cb836e97448062506,
title = "Generation of nanoflowers and nanoneedles on Co-based layered perovskite of IT-SOFC cathode affecting electrical conductivities",
abstract = "In this study, the unusual microstructure and electrical properties of SmBa0.5Sr0.5Co2O5+d (SBSCO) layered perovskite cathodes with dense and porous microstructures were analyzed by changing the applied current. Unique nanostructure shapes were observed when a high current was applied to a cathode with both dense and porous microstructures of the same chemical composition for electrical conductivity measurement. Nanoflower and nanoneedles, which are types of nanoseeds, were discovered. The nanoneedles were found on the entire surface of the SBSCO cathode, whereas nanoflowers were only present on part of the cathode surface. Results from an Energy Dispersive Spectrometer (EDS) analysis revealed that the nanoneedles generated on the SBSCO matrix had a chemical composition of SmBaCo2O5+d (SBCO). The electrical conductivity of the porous cathode with SBCO nanoneedles (nanoneedle cathode) was 238 S/cm at 700 °C under decreasing temperature in an air atmosphere (Air Down) during the experiment. In comparison, the electrical conductivity of the porous cathode without nanoneedles (normal cathode) was 136 S/cm at the same experiment condition (700 °C, Air Down). This indicates that the electrical conductivity of the nanoneedle cathode was significantly higher than that of the normal cathode.",
author = "Im, {Ji Min} and Song, {Kyeong Eun} and Harald Schlegl and Hyunil Kang and Wonseok Choi and Seung-Wook Baek and Jun-Young Park and Hyun-Suk Kim and Kim, {Jung Hyun}",
year = "2023",
month = nov,
day = "9",
doi = "10.1016/j.ijhydene.2023.05.327",
language = "English",
volume = "48",
pages = "35229--35239",
journal = "International Journal of Hydrogen Energy",
issn = "0360-3199",
publisher = "Elsevier Limited",
number = "90",

}

RIS

TY - JOUR

T1 - Generation of nanoflowers and nanoneedles on Co-based layered perovskite of IT-SOFC cathode affecting electrical conductivities

AU - Im, Ji Min

AU - Song, Kyeong Eun

AU - Schlegl, Harald

AU - Kang, Hyunil

AU - Choi, Wonseok

AU - Baek, Seung-Wook

AU - Park, Jun-Young

AU - Kim, Hyun-Suk

AU - Kim, Jung Hyun

PY - 2023/11/9

Y1 - 2023/11/9

N2 - In this study, the unusual microstructure and electrical properties of SmBa0.5Sr0.5Co2O5+d (SBSCO) layered perovskite cathodes with dense and porous microstructures were analyzed by changing the applied current. Unique nanostructure shapes were observed when a high current was applied to a cathode with both dense and porous microstructures of the same chemical composition for electrical conductivity measurement. Nanoflower and nanoneedles, which are types of nanoseeds, were discovered. The nanoneedles were found on the entire surface of the SBSCO cathode, whereas nanoflowers were only present on part of the cathode surface. Results from an Energy Dispersive Spectrometer (EDS) analysis revealed that the nanoneedles generated on the SBSCO matrix had a chemical composition of SmBaCo2O5+d (SBCO). The electrical conductivity of the porous cathode with SBCO nanoneedles (nanoneedle cathode) was 238 S/cm at 700 °C under decreasing temperature in an air atmosphere (Air Down) during the experiment. In comparison, the electrical conductivity of the porous cathode without nanoneedles (normal cathode) was 136 S/cm at the same experiment condition (700 °C, Air Down). This indicates that the electrical conductivity of the nanoneedle cathode was significantly higher than that of the normal cathode.

AB - In this study, the unusual microstructure and electrical properties of SmBa0.5Sr0.5Co2O5+d (SBSCO) layered perovskite cathodes with dense and porous microstructures were analyzed by changing the applied current. Unique nanostructure shapes were observed when a high current was applied to a cathode with both dense and porous microstructures of the same chemical composition for electrical conductivity measurement. Nanoflower and nanoneedles, which are types of nanoseeds, were discovered. The nanoneedles were found on the entire surface of the SBSCO cathode, whereas nanoflowers were only present on part of the cathode surface. Results from an Energy Dispersive Spectrometer (EDS) analysis revealed that the nanoneedles generated on the SBSCO matrix had a chemical composition of SmBaCo2O5+d (SBCO). The electrical conductivity of the porous cathode with SBCO nanoneedles (nanoneedle cathode) was 238 S/cm at 700 °C under decreasing temperature in an air atmosphere (Air Down) during the experiment. In comparison, the electrical conductivity of the porous cathode without nanoneedles (normal cathode) was 136 S/cm at the same experiment condition (700 °C, Air Down). This indicates that the electrical conductivity of the nanoneedle cathode was significantly higher than that of the normal cathode.

U2 - 10.1016/j.ijhydene.2023.05.327

DO - 10.1016/j.ijhydene.2023.05.327

M3 - Journal article

VL - 48

SP - 35229

EP - 35239

JO - International Journal of Hydrogen Energy

JF - International Journal of Hydrogen Energy

SN - 0360-3199

IS - 90

ER -