Cobalt-doped BaZrO 3: A single phase air electrode material for reversible solid oxide cells

Yuanyuan Rao; Shenghong Zhong; Fei He; Zhenbin Wang; Ranran Peng; Yalin Lu

doi:10.1016/j.ijhydene.2012.05.022

Cobalt-doped BaZrO ₃: A single phase air electrode material for reversible solid oxide cells

Yuanyuan Rao, Shenghong Zhong, Fei He, Zhenbin Wang, Ranran Peng, Yalin Lu

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

89 Citations (Scopus)

Abstract

BaZr _1-xCo _xO _3-δ (BZC-x, x = 0.1, 0.2, 0.3, 0.4, 0.5) are prepared and identified as single phase air electrode materials for reversible solid oxide cells. BZC-x shows a typical perovskite structure with x ≤ 0.4, and slight BaCoO ₃ second phase is observed with x = 0.5. Conductivity measurements suggest that BZC-x is an oxygen ion and electron mixed conductor in dry oxygen atmosphere. The electronic conductivity of BZC-x increases when increasing Co content in BZC-x specimen, while the ionic conductivity reduces. For BaZr _0.6Co _0.4O _3-δ, the electronic and ionic conductivity are 5.24 S cm ^-1 and 1.20 × 10 ^-3 S cm ^-1, respectively, measured at 700°C in dry oxygen. With BZC-0.4 as a single phase air electrode, the discharging and electrolysis current densities of a single cell are 299 mA cm ^-2 (at 0.7 V) and -935 mA cm ^-2 (at 1.5 V), respectively, measured at 700°C. The polarization resistance of cells using this new air electrode is only 0.19 Ω cm ², approximately 65% lower than that using a traditional Sm _0.5Sr _0.5CoO _3-δ/BaCe _0.5Zr _0.3Y _0.2O _3-δ composite air electrode. © 2012 Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.

Original language	English
Pages (from-to)	12522-12527
Journal	International Journal of Hydrogen Energy
Volume	37
Issue number	17
DOIs	https://doi.org/10.1016/j.ijhydene.2012.05.022
Publication status	Published - Sept 2012
Externally published	Yes

Bibliographical note

Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].

Funding

This work was financially supported by the Natural Science Foundation of China (51072193), National Basic Research Program of China (973 Program, 2012CB922001), and by the Fundamental Research Funds for the Central Universities.

Research Keywords

Air electrodes
Proton conducting electrolytes
Proton-electron mixed conductor
Reversible solid oxide cells
Solid oxide electrolysis cells
Solid oxide fuel cells

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@article{19ab5aacc6e049e68526e49fff5369a7,

title = "Cobalt-doped BaZrO 3: A single phase air electrode material for reversible solid oxide cells",

abstract = "BaZr 1-xCo xO 3-δ (BZC-x, x = 0.1, 0.2, 0.3, 0.4, 0.5) are prepared and identified as single phase air electrode materials for reversible solid oxide cells. BZC-x shows a typical perovskite structure with x ≤ 0.4, and slight BaCoO 3 second phase is observed with x = 0.5. Conductivity measurements suggest that BZC-x is an oxygen ion and electron mixed conductor in dry oxygen atmosphere. The electronic conductivity of BZC-x increases when increasing Co content in BZC-x specimen, while the ionic conductivity reduces. For BaZr 0.6Co 0.4O 3-δ, the electronic and ionic conductivity are 5.24 S cm -1 and 1.20 × 10 -3 S cm -1, respectively, measured at 700°C in dry oxygen. With BZC-0.4 as a single phase air electrode, the discharging and electrolysis current densities of a single cell are 299 mA cm -2 (at 0.7 V) and -935 mA cm -2 (at 1.5 V), respectively, measured at 700°C. The polarization resistance of cells using this new air electrode is only 0.19 Ω cm 2, approximately 65% lower than that using a traditional Sm 0.5Sr 0.5CoO 3-δ/BaCe 0.5Zr 0.3Y 0.2O 3-δ composite air electrode. {\textcopyright} 2012 Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.",

keywords = "Air electrodes, Proton conducting electrolytes, Proton-electron mixed conductor, Reversible solid oxide cells, Solid oxide electrolysis cells, Solid oxide fuel cells",

author = "Yuanyuan Rao and Shenghong Zhong and Fei He and Zhenbin Wang and Ranran Peng and Yalin Lu",

note = "Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected]. ",

year = "2012",

month = sep,

doi = "10.1016/j.ijhydene.2012.05.022",

language = "English",

volume = "37",

pages = "12522--12527",

journal = "International Journal of Hydrogen Energy",

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TY - JOUR

T1 - Cobalt-doped BaZrO 3

T2 - A single phase air electrode material for reversible solid oxide cells

AU - Rao, Yuanyuan

AU - Zhong, Shenghong

AU - He, Fei

AU - Wang, Zhenbin

AU - Peng, Ranran

AU - Lu, Yalin

N1 - Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].

PY - 2012/9

Y1 - 2012/9

N2 - BaZr 1-xCo xO 3-δ (BZC-x, x = 0.1, 0.2, 0.3, 0.4, 0.5) are prepared and identified as single phase air electrode materials for reversible solid oxide cells. BZC-x shows a typical perovskite structure with x ≤ 0.4, and slight BaCoO 3 second phase is observed with x = 0.5. Conductivity measurements suggest that BZC-x is an oxygen ion and electron mixed conductor in dry oxygen atmosphere. The electronic conductivity of BZC-x increases when increasing Co content in BZC-x specimen, while the ionic conductivity reduces. For BaZr 0.6Co 0.4O 3-δ, the electronic and ionic conductivity are 5.24 S cm -1 and 1.20 × 10 -3 S cm -1, respectively, measured at 700°C in dry oxygen. With BZC-0.4 as a single phase air electrode, the discharging and electrolysis current densities of a single cell are 299 mA cm -2 (at 0.7 V) and -935 mA cm -2 (at 1.5 V), respectively, measured at 700°C. The polarization resistance of cells using this new air electrode is only 0.19 Ω cm 2, approximately 65% lower than that using a traditional Sm 0.5Sr 0.5CoO 3-δ/BaCe 0.5Zr 0.3Y 0.2O 3-δ composite air electrode. © 2012 Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.

AB - BaZr 1-xCo xO 3-δ (BZC-x, x = 0.1, 0.2, 0.3, 0.4, 0.5) are prepared and identified as single phase air electrode materials for reversible solid oxide cells. BZC-x shows a typical perovskite structure with x ≤ 0.4, and slight BaCoO 3 second phase is observed with x = 0.5. Conductivity measurements suggest that BZC-x is an oxygen ion and electron mixed conductor in dry oxygen atmosphere. The electronic conductivity of BZC-x increases when increasing Co content in BZC-x specimen, while the ionic conductivity reduces. For BaZr 0.6Co 0.4O 3-δ, the electronic and ionic conductivity are 5.24 S cm -1 and 1.20 × 10 -3 S cm -1, respectively, measured at 700°C in dry oxygen. With BZC-0.4 as a single phase air electrode, the discharging and electrolysis current densities of a single cell are 299 mA cm -2 (at 0.7 V) and -935 mA cm -2 (at 1.5 V), respectively, measured at 700°C. The polarization resistance of cells using this new air electrode is only 0.19 Ω cm 2, approximately 65% lower than that using a traditional Sm 0.5Sr 0.5CoO 3-δ/BaCe 0.5Zr 0.3Y 0.2O 3-δ composite air electrode. © 2012 Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.

KW - Air electrodes

KW - Proton conducting electrolytes

KW - Proton-electron mixed conductor

KW - Reversible solid oxide cells

KW - Solid oxide electrolysis cells

KW - Solid oxide fuel cells

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U2 - 10.1016/j.ijhydene.2012.05.022

DO - 10.1016/j.ijhydene.2012.05.022

M3 - RGC 21 - Publication in refereed journal

SN - 0360-3199

VL - 37

SP - 12522

EP - 12527

JO - International Journal of Hydrogen Energy

JF - International Journal of Hydrogen Energy

IS - 17

ER -