A novel electronic current-blocked stable mixed ionic conductor for solid oxide fuel cells

Wenping Sun, Yinzhu Jiang, Yanfei Wang, Shumin Fang, Zhiwen Zhu, Wei Liu

Research output: Contribution to journalArticleAcademicpeer-review

63 Citations (Scopus)

Abstract

A novel ionic conductor, BaCe0.8Sm0.2O3¿¿¿Ce0.8Sm0.2O2¿¿ (BCS¿SDC, weight ratio 1:1), is reported as an electrolyte material for solid oxide fuel cells (SOFCs). Homogeneous BCS¿SDC composite powders are synthesized via a one-step gel combustion method. The BCS and SDC crystalline grains play a role as matrix for each other in the composite electrolyte. The composite avoids the typical drawbacks of BCS and SDC, showing not only a better chemical stability than the single phase of BCS but much higher open circuit voltages (OCVs) than the single phase of SDC under the fuel cell conditions. Moreover, BCS¿SDC exhibits mixed oxygen ionic and protonic conduction. A total conductivity of 0.0204 S cm¿1 at 700 °C is achieved in wet hydrogen (3% H2O), the value of which is comparable with the state-of-the-art proton conductor BaZr0.1Ce0.7Y0.2O3¿¿ (BZCY). The peak power density achieves 505 mW cm¿2 at 700 °C with a 30-¿m-thick BCS¿SDC electrolyte using wet H2 as the fuel. Resistances of the tested cell under open circuit conditions at different operating temperatures are also investigated by impedance spectroscopy.
Original languageEnglish
Pages (from-to)62-68
Number of pages7
JournalJournal of power sources
Volume196
Issue number1
DOIs
Publication statusPublished - 2011

Fingerprint

solid oxide fuel cells
Solid oxide fuel cells (SOFC)
Electrolytes
conductors
electrolytes
composite materials
Composite materials
electronics
Chemical stability
Open circuit voltage
tritium
open circuit voltage
operating temperature
Powders
fuel cells
Protons
radiant flux density
Fuel cells
high voltages
Hydrogen

Keywords

  • IR-73930
  • Mixed ionic conductor
  • Electronic current-blocked
  • Electrochemical performance
  • Electrolyte
  • Solid Oxide Fuel Cells

Cite this

Sun, Wenping ; Jiang, Yinzhu ; Wang, Yanfei ; Fang, Shumin ; Zhu, Zhiwen ; Liu, Wei. / A novel electronic current-blocked stable mixed ionic conductor for solid oxide fuel cells. In: Journal of power sources. 2011 ; Vol. 196, No. 1. pp. 62-68.
@article{56bcc7c6b738416b81b689754320bb1a,
title = "A novel electronic current-blocked stable mixed ionic conductor for solid oxide fuel cells",
abstract = "A novel ionic conductor, BaCe0.8Sm0.2O3¿¿¿Ce0.8Sm0.2O2¿¿ (BCS¿SDC, weight ratio 1:1), is reported as an electrolyte material for solid oxide fuel cells (SOFCs). Homogeneous BCS¿SDC composite powders are synthesized via a one-step gel combustion method. The BCS and SDC crystalline grains play a role as matrix for each other in the composite electrolyte. The composite avoids the typical drawbacks of BCS and SDC, showing not only a better chemical stability than the single phase of BCS but much higher open circuit voltages (OCVs) than the single phase of SDC under the fuel cell conditions. Moreover, BCS¿SDC exhibits mixed oxygen ionic and protonic conduction. A total conductivity of 0.0204 S cm¿1 at 700 °C is achieved in wet hydrogen (3{\%} H2O), the value of which is comparable with the state-of-the-art proton conductor BaZr0.1Ce0.7Y0.2O3¿¿ (BZCY). The peak power density achieves 505 mW cm¿2 at 700 °C with a 30-¿m-thick BCS¿SDC electrolyte using wet H2 as the fuel. Resistances of the tested cell under open circuit conditions at different operating temperatures are also investigated by impedance spectroscopy.",
keywords = "IR-73930, Mixed ionic conductor, Electronic current-blocked, Electrochemical performance, Electrolyte, Solid Oxide Fuel Cells",
author = "Wenping Sun and Yinzhu Jiang and Yanfei Wang and Shumin Fang and Zhiwen Zhu and Wei Liu",
year = "2011",
doi = "10.1016/j.jpowsour.2010.07.038",
language = "English",
volume = "196",
pages = "62--68",
journal = "Journal of power sources",
issn = "0378-7753",
publisher = "Elsevier",
number = "1",

}

A novel electronic current-blocked stable mixed ionic conductor for solid oxide fuel cells. / Sun, Wenping; Jiang, Yinzhu; Wang, Yanfei; Fang, Shumin; Zhu, Zhiwen; Liu, Wei.

In: Journal of power sources, Vol. 196, No. 1, 2011, p. 62-68.

Research output: Contribution to journalArticleAcademicpeer-review

TY - JOUR

T1 - A novel electronic current-blocked stable mixed ionic conductor for solid oxide fuel cells

AU - Sun, Wenping

AU - Jiang, Yinzhu

AU - Wang, Yanfei

AU - Fang, Shumin

AU - Zhu, Zhiwen

AU - Liu, Wei

PY - 2011

Y1 - 2011

N2 - A novel ionic conductor, BaCe0.8Sm0.2O3¿¿¿Ce0.8Sm0.2O2¿¿ (BCS¿SDC, weight ratio 1:1), is reported as an electrolyte material for solid oxide fuel cells (SOFCs). Homogeneous BCS¿SDC composite powders are synthesized via a one-step gel combustion method. The BCS and SDC crystalline grains play a role as matrix for each other in the composite electrolyte. The composite avoids the typical drawbacks of BCS and SDC, showing not only a better chemical stability than the single phase of BCS but much higher open circuit voltages (OCVs) than the single phase of SDC under the fuel cell conditions. Moreover, BCS¿SDC exhibits mixed oxygen ionic and protonic conduction. A total conductivity of 0.0204 S cm¿1 at 700 °C is achieved in wet hydrogen (3% H2O), the value of which is comparable with the state-of-the-art proton conductor BaZr0.1Ce0.7Y0.2O3¿¿ (BZCY). The peak power density achieves 505 mW cm¿2 at 700 °C with a 30-¿m-thick BCS¿SDC electrolyte using wet H2 as the fuel. Resistances of the tested cell under open circuit conditions at different operating temperatures are also investigated by impedance spectroscopy.

AB - A novel ionic conductor, BaCe0.8Sm0.2O3¿¿¿Ce0.8Sm0.2O2¿¿ (BCS¿SDC, weight ratio 1:1), is reported as an electrolyte material for solid oxide fuel cells (SOFCs). Homogeneous BCS¿SDC composite powders are synthesized via a one-step gel combustion method. The BCS and SDC crystalline grains play a role as matrix for each other in the composite electrolyte. The composite avoids the typical drawbacks of BCS and SDC, showing not only a better chemical stability than the single phase of BCS but much higher open circuit voltages (OCVs) than the single phase of SDC under the fuel cell conditions. Moreover, BCS¿SDC exhibits mixed oxygen ionic and protonic conduction. A total conductivity of 0.0204 S cm¿1 at 700 °C is achieved in wet hydrogen (3% H2O), the value of which is comparable with the state-of-the-art proton conductor BaZr0.1Ce0.7Y0.2O3¿¿ (BZCY). The peak power density achieves 505 mW cm¿2 at 700 °C with a 30-¿m-thick BCS¿SDC electrolyte using wet H2 as the fuel. Resistances of the tested cell under open circuit conditions at different operating temperatures are also investigated by impedance spectroscopy.

KW - IR-73930

KW - Mixed ionic conductor

KW - Electronic current-blocked

KW - Electrochemical performance

KW - Electrolyte

KW - Solid Oxide Fuel Cells

U2 - 10.1016/j.jpowsour.2010.07.038

DO - 10.1016/j.jpowsour.2010.07.038

M3 - Article

VL - 196

SP - 62

EP - 68

JO - Journal of power sources

JF - Journal of power sources

SN - 0378-7753

IS - 1

ER -