CuCo2O4-Er0.4Bi1.6O3-δ: An active hybrid cathode for intermediate temperature solid oxide fuel cells

Yu Kong; Chengzhi Sun; Xian Wu; Yu Zhang; Naiqing Zhang; Kening Sun

doi:10.1016/j.ceramint.2018.12.074

CuCo₂O₄-Er_0.4Bi_1.6O_3-δ: An active hybrid cathode for intermediate temperature solid oxide fuel cells

Yu Kong, Chengzhi Sun, Xian Wu, Yu Zhang, Naiqing Zhang^*, Kening Sun

^*Corresponding author for this work

Harbin Institute of Technology

Research output: Contribution to journal › Article › peer-review

11 Citations (Scopus)

Abstract

The sluggish oxygen reduction reaction acts as a vital barrier to the performance enhancement for intermediate temperature solid oxide fuel cells. In this paper we report a CuCo₂O₄-Er_0.4Bi_1.6O_3-δ composite cathode synthesized via sol-gel and subsequent mechanical mixing methods. The composite cathode contains an electronic conductor CuCo₂O₄ and an ionic conductor Er_0.4Bi_1.6O_3-δ, dramatically enhancing the oxygen reduction reaction kinetics and the sintering performance. Introduction of the Er_0.4Bi_1.6O_3-δ nanoparticles brings an obvious increase of triple phase boundaries and enhancement of electrochemical activities. As expected, the composite cathode with addition of 35 wt% of Er_0.4Bi_1.6O_3-δ shows the least polarization resistance of 0.07 Ω cm² in air at 800 °C. What's more, the sintering temperature is distinctly reduced from 1000 °C to 800 °C.

Original language	English
Pages (from-to)	6037-6042
Number of pages	6
Journal	Ceramics International
Volume	45
Issue number	5
DOIs	https://doi.org/10.1016/j.ceramint.2018.12.074
Publication status	Published - 1 Apr 2019
Externally published	Yes

Keywords

CuCoO-ErBiO composite cathode
Intermediate temperatures solid oxide fuel cells
Oxygen reduction reaction
Sintering temperature

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10.1016/j.ceramint.2018.12.074

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title = "CuCo2O4-Er0.4Bi1.6O3-δ: An active hybrid cathode for intermediate temperature solid oxide fuel cells",

abstract = "The sluggish oxygen reduction reaction acts as a vital barrier to the performance enhancement for intermediate temperature solid oxide fuel cells. In this paper we report a CuCo2O4-Er0.4Bi1.6O3-δ composite cathode synthesized via sol-gel and subsequent mechanical mixing methods. The composite cathode contains an electronic conductor CuCo2O4 and an ionic conductor Er0.4Bi1.6O3-δ, dramatically enhancing the oxygen reduction reaction kinetics and the sintering performance. Introduction of the Er0.4Bi1.6O3-δ nanoparticles brings an obvious increase of triple phase boundaries and enhancement of electrochemical activities. As expected, the composite cathode with addition of 35 wt\% of Er0.4Bi1.6O3-δ shows the least polarization resistance of 0.07 Ω cm2 in air at 800 °C. What's more, the sintering temperature is distinctly reduced from 1000 °C to 800 °C.",

keywords = "CuCoO-ErBiO composite cathode, Intermediate temperatures solid oxide fuel cells, Oxygen reduction reaction, Sintering temperature",

author = "Yu Kong and Chengzhi Sun and Xian Wu and Yu Zhang and Naiqing Zhang and Kening Sun",

note = "Publisher Copyright: {\textcopyright} 2018",

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doi = "10.1016/j.ceramint.2018.12.074",

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T2 - An active hybrid cathode for intermediate temperature solid oxide fuel cells

AU - Kong, Yu

AU - Sun, Chengzhi

AU - Wu, Xian

AU - Zhang, Yu

AU - Zhang, Naiqing

AU - Sun, Kening

PY - 2019/4/1

Y1 - 2019/4/1

N2 - The sluggish oxygen reduction reaction acts as a vital barrier to the performance enhancement for intermediate temperature solid oxide fuel cells. In this paper we report a CuCo2O4-Er0.4Bi1.6O3-δ composite cathode synthesized via sol-gel and subsequent mechanical mixing methods. The composite cathode contains an electronic conductor CuCo2O4 and an ionic conductor Er0.4Bi1.6O3-δ, dramatically enhancing the oxygen reduction reaction kinetics and the sintering performance. Introduction of the Er0.4Bi1.6O3-δ nanoparticles brings an obvious increase of triple phase boundaries and enhancement of electrochemical activities. As expected, the composite cathode with addition of 35 wt% of Er0.4Bi1.6O3-δ shows the least polarization resistance of 0.07 Ω cm2 in air at 800 °C. What's more, the sintering temperature is distinctly reduced from 1000 °C to 800 °C.

AB - The sluggish oxygen reduction reaction acts as a vital barrier to the performance enhancement for intermediate temperature solid oxide fuel cells. In this paper we report a CuCo2O4-Er0.4Bi1.6O3-δ composite cathode synthesized via sol-gel and subsequent mechanical mixing methods. The composite cathode contains an electronic conductor CuCo2O4 and an ionic conductor Er0.4Bi1.6O3-δ, dramatically enhancing the oxygen reduction reaction kinetics and the sintering performance. Introduction of the Er0.4Bi1.6O3-δ nanoparticles brings an obvious increase of triple phase boundaries and enhancement of electrochemical activities. As expected, the composite cathode with addition of 35 wt% of Er0.4Bi1.6O3-δ shows the least polarization resistance of 0.07 Ω cm2 in air at 800 °C. What's more, the sintering temperature is distinctly reduced from 1000 °C to 800 °C.

KW - CuCoO-ErBiO composite cathode

KW - Intermediate temperatures solid oxide fuel cells

KW - Oxygen reduction reaction

KW - Sintering temperature

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CuCo₂O₄-Er_0.4Bi_1.6O_3-δ: An active hybrid cathode for intermediate temperature solid oxide fuel cells

Abstract

Keywords

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