An Efficient Bifunctional Air Electrode for Reversible Protonic Ceramic Electrochemical Cells

Yucun Zhou; Weilin Zhang; Nicholas Kane; Zheyu Luo; Kai Pei; Kotaro Sasaki; YongMan Choi; Yu Chen; Dong Ding; Meilin Liu

doi:10.1002/adfm.202105386

An Efficient Bifunctional Air Electrode for Reversible Protonic Ceramic Electrochemical Cells

Yucun Zhou, Weilin Zhang, Nicholas Kane, Zheyu Luo, Kai Pei, Kotaro Sasaki, YongMan Choi^*, Yu Chen^*, Dong Ding, Meilin Liu^*

^*Corresponding author for this work

Institute of Photonic System

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

99 Scopus citations

Abstract

One of the main bottlenecks that limit the performance of reversible protonic ceramic electrochemical cells (R-PCECs) is the sluggish kinetics of the oxygen reduction and evolution reactions (ORR and OER). Here, the significantly enhanced ORR and OER kinetics and stability of a conventional La0.6Sr0.4Co0.2Fe0.8O3–δ (LSCF) air electrode by an efficient catalyst coating of barium cobaltite (BCO) is reported. The polarization resistance of a BCO-coated LSCF air electrode at 600 °C is 0.16 Ω cm2, about 30% of that of the bare LSCF air electrode under the same conditions. Further, an R-PCEC with the BCO-coated LSCF air electrode shows exceptional performance in both fuel cell (peak power density of 1.16 W cm−2 at 600 °C) and electrolysis (current density of 1.80 A cm−2 at 600 °C at 1.3 V) modes. The performance enhancement is attributed mainly to the facilitated rate of oxygen surface exchange.

Original language	English
Article number	2105386
Journal	Advanced Functional Materials
Volume	31
Issue number	40
DOIs	https://doi.org/10.1002/adfm.202105386
State	Published - 1 Oct 2021

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@article{068549c24e4843ffbeac5641aadeb246,

title = "An Efficient Bifunctional Air Electrode for Reversible Protonic Ceramic Electrochemical Cells",

abstract = "One of the main bottlenecks that limit the performance of reversible protonic ceramic electrochemical cells (R-PCECs) is the sluggish kinetics of the oxygen reduction and evolution reactions (ORR and OER). Here, the significantly enhanced ORR and OER kinetics and stability of a conventional La0.6Sr0.4Co0.2Fe0.8O3–δ (LSCF) air electrode by an efficient catalyst coating of barium cobaltite (BCO) is reported. The polarization resistance of a BCO-coated LSCF air electrode at 600 °C is 0.16 Ω cm2, about 30% of that of the bare LSCF air electrode under the same conditions. Further, an R-PCEC with the BCO-coated LSCF air electrode shows exceptional performance in both fuel cell (peak power density of 1.16 W cm−2 at 600 °C) and electrolysis (current density of 1.80 A cm−2 at 600 °C at 1.3 V) modes. The performance enhancement is attributed mainly to the facilitated rate of oxygen surface exchange.",

author = "Yucun Zhou and Weilin Zhang and Nicholas Kane and Zheyu Luo and Kai Pei and Kotaro Sasaki and YongMan Choi and Yu Chen and Dong Ding and Meilin Liu",

year = "2021",

month = oct,

day = "1",

doi = "10.1002/adfm.202105386",

language = "English",

volume = "31",

journal = "Advanced Functional Materials",

issn = "1616-301X",

publisher = "Wiley-VCH Verlag",

number = "40",

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TY - JOUR

T1 - An Efficient Bifunctional Air Electrode for Reversible Protonic Ceramic Electrochemical Cells

AU - Zhou, Yucun

AU - Zhang, Weilin

AU - Kane, Nicholas

AU - Luo, Zheyu

AU - Pei, Kai

AU - Sasaki, Kotaro

AU - Choi, YongMan

AU - Chen, Yu

AU - Ding, Dong

AU - Liu, Meilin

PY - 2021/10/1

Y1 - 2021/10/1

N2 - One of the main bottlenecks that limit the performance of reversible protonic ceramic electrochemical cells (R-PCECs) is the sluggish kinetics of the oxygen reduction and evolution reactions (ORR and OER). Here, the significantly enhanced ORR and OER kinetics and stability of a conventional La0.6Sr0.4Co0.2Fe0.8O3–δ (LSCF) air electrode by an efficient catalyst coating of barium cobaltite (BCO) is reported. The polarization resistance of a BCO-coated LSCF air electrode at 600 °C is 0.16 Ω cm2, about 30% of that of the bare LSCF air electrode under the same conditions. Further, an R-PCEC with the BCO-coated LSCF air electrode shows exceptional performance in both fuel cell (peak power density of 1.16 W cm−2 at 600 °C) and electrolysis (current density of 1.80 A cm−2 at 600 °C at 1.3 V) modes. The performance enhancement is attributed mainly to the facilitated rate of oxygen surface exchange.

AB - One of the main bottlenecks that limit the performance of reversible protonic ceramic electrochemical cells (R-PCECs) is the sluggish kinetics of the oxygen reduction and evolution reactions (ORR and OER). Here, the significantly enhanced ORR and OER kinetics and stability of a conventional La0.6Sr0.4Co0.2Fe0.8O3–δ (LSCF) air electrode by an efficient catalyst coating of barium cobaltite (BCO) is reported. The polarization resistance of a BCO-coated LSCF air electrode at 600 °C is 0.16 Ω cm2, about 30% of that of the bare LSCF air electrode under the same conditions. Further, an R-PCEC with the BCO-coated LSCF air electrode shows exceptional performance in both fuel cell (peak power density of 1.16 W cm−2 at 600 °C) and electrolysis (current density of 1.80 A cm−2 at 600 °C at 1.3 V) modes. The performance enhancement is attributed mainly to the facilitated rate of oxygen surface exchange.

UR - https://onlinelibrary.wiley.com/doi/full/10.1002/adfm.202105386

U2 - 10.1002/adfm.202105386

DO - 10.1002/adfm.202105386

M3 - Article

SN - 1616-301X

VL - 31

JO - Advanced Functional Materials

JF - Advanced Functional Materials

IS - 40

M1 - 2105386

ER -

An Efficient Bifunctional Air Electrode for Reversible Protonic Ceramic Electrochemical Cells

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