A cobalt-free bismuth ferrite-based cathode for intermediate temperature solid oxide fuel cells

Juntao Gao; Qiang Li; Zhiping Zhang; Zhe Lü; Bo Wei

doi:10.1016/j.elecom.2021.106978

A cobalt-free bismuth ferrite-based cathode for intermediate temperature solid oxide fuel cells

Juntao Gao
, Qiang Li
, Zhiping Zhang
, Zhe Lü
, Bo Wei^*

^*Corresponding author for this work

School of Physics, Harbin Institute of Technology
Heilongjiang University
Harbin Engineering University

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

60 Scopus citations

Abstract

High catalytic activity of cathode material is one of the key requirements for the practical application of solid oxide fuel cells (SOFC). Here we designed and evaluated a novel non-metal P-doped (Bi, Sr)FeO₃₋_δ, i.e., Bi_0.5Sr_0.5Fe_0.95P_0.05O₃₋_δ (BSFP) oxide, as cathode material. BSFP with a cubic structure presents excellent chemical compatibility with Ce_0.9Gd_0.1O_1.95 (GDC) electrolyte after sintering at 1100 °C. Impedance analysis reveals its polarization resistance (R_p) is as low as 0.18 Ω cm² at 700 °C. Further kinetics study suggests the low-frequency process is the rate-limiting step of the oxygen reduction reaction (ORR). An anode-supported single cell delivers attractive power output of 0.56 W cm⁻² at 700 °C. The electroactivity is superior to undoped (Bi, Sr)FeO_3−δ, indicating that BSFP perovskite could be a promising cathode for SOFC operating at intermediate temperatures.

Original language	English
Article number	106978
Journal	Electrochemistry Communications
Volume	125
DOIs	https://doi.org/10.1016/j.elecom.2021.106978
State	Published - Apr 2021
Externally published	Yes

Keywords

Cathode materials
Cobalt-free
Electrochemical performance
Solid oxide fuel cell

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10.1016/j.elecom.2021.106978

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title = "A cobalt-free bismuth ferrite-based cathode for intermediate temperature solid oxide fuel cells",

abstract = "High catalytic activity of cathode material is one of the key requirements for the practical application of solid oxide fuel cells (SOFC). Here we designed and evaluated a novel non-metal P-doped (Bi, Sr)FeO3−δ, i.e., Bi0.5Sr0.5Fe0.95P0.05O3−δ (BSFP) oxide, as cathode material. BSFP with a cubic structure presents excellent chemical compatibility with Ce0.9Gd0.1O1.95 (GDC) electrolyte after sintering at 1100 °C. Impedance analysis reveals its polarization resistance (Rp) is as low as 0.18 Ω cm2 at 700 °C. Further kinetics study suggests the low-frequency process is the rate-limiting step of the oxygen reduction reaction (ORR). An anode-supported single cell delivers attractive power output of 0.56 W cm−2 at 700 °C. The electroactivity is superior to undoped (Bi, Sr)FeO3−δ, indicating that BSFP perovskite could be a promising cathode for SOFC operating at intermediate temperatures.",

keywords = "Cathode materials, Cobalt-free, Electrochemical performance, Solid oxide fuel cell",

author = "Juntao Gao and Qiang Li and Zhiping Zhang and Zhe L{\"u} and Bo Wei",

note = "Publisher Copyright: {\textcopyright} 2021 The Author(s)",

year = "2021",

month = apr,

doi = "10.1016/j.elecom.2021.106978",

language = "英语",

volume = "125",

journal = "Electrochemistry Communications",

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T1 - A cobalt-free bismuth ferrite-based cathode for intermediate temperature solid oxide fuel cells

AU - Gao, Juntao

AU - Li, Qiang

AU - Zhang, Zhiping

AU - Lü, Zhe

AU - Wei, Bo

PY - 2021/4

Y1 - 2021/4

N2 - High catalytic activity of cathode material is one of the key requirements for the practical application of solid oxide fuel cells (SOFC). Here we designed and evaluated a novel non-metal P-doped (Bi, Sr)FeO3−δ, i.e., Bi0.5Sr0.5Fe0.95P0.05O3−δ (BSFP) oxide, as cathode material. BSFP with a cubic structure presents excellent chemical compatibility with Ce0.9Gd0.1O1.95 (GDC) electrolyte after sintering at 1100 °C. Impedance analysis reveals its polarization resistance (Rp) is as low as 0.18 Ω cm2 at 700 °C. Further kinetics study suggests the low-frequency process is the rate-limiting step of the oxygen reduction reaction (ORR). An anode-supported single cell delivers attractive power output of 0.56 W cm−2 at 700 °C. The electroactivity is superior to undoped (Bi, Sr)FeO3−δ, indicating that BSFP perovskite could be a promising cathode for SOFC operating at intermediate temperatures.

AB - High catalytic activity of cathode material is one of the key requirements for the practical application of solid oxide fuel cells (SOFC). Here we designed and evaluated a novel non-metal P-doped (Bi, Sr)FeO3−δ, i.e., Bi0.5Sr0.5Fe0.95P0.05O3−δ (BSFP) oxide, as cathode material. BSFP with a cubic structure presents excellent chemical compatibility with Ce0.9Gd0.1O1.95 (GDC) electrolyte after sintering at 1100 °C. Impedance analysis reveals its polarization resistance (Rp) is as low as 0.18 Ω cm2 at 700 °C. Further kinetics study suggests the low-frequency process is the rate-limiting step of the oxygen reduction reaction (ORR). An anode-supported single cell delivers attractive power output of 0.56 W cm−2 at 700 °C. The electroactivity is superior to undoped (Bi, Sr)FeO3−δ, indicating that BSFP perovskite could be a promising cathode for SOFC operating at intermediate temperatures.

KW - Cathode materials

KW - Cobalt-free

KW - Electrochemical performance

KW - Solid oxide fuel cell

UR - https://www.scopus.com/pages/publications/85101777133

U2 - 10.1016/j.elecom.2021.106978

DO - 10.1016/j.elecom.2021.106978

M3 - 文章

AN - SCOPUS:85101777133

SN - 1388-2481

VL - 125

JO - Electrochemistry Communications

JF - Electrochemistry Communications

M1 - 106978

ER -

A cobalt-free bismuth ferrite-based cathode for intermediate temperature solid oxide fuel cells

Abstract

Keywords

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