Configuration entropy tailored beneficial surface segregation on double perovskite cathode with enhanced Cr-tolerance for SOFC

Mengke Yuan; Zhe Wang; Juntao Gao; Hongru Hao; Zhe Lv; Xiutao Lou; Limin Liu; Lingling Xu; Jingwei Li; Bo Wei

doi:10.1016/j.ceramint.2024.01.426

Configuration entropy tailored beneficial surface segregation on double perovskite cathode with enhanced Cr-tolerance for SOFC

Mengke Yuan
, Zhe Wang
, Juntao Gao
, Hongru Hao
, Zhe Lv
, Xiutao Lou
, Limin Liu^*
, Lingling Xu^*
, Jingwei Li
, Bo Wei^*

^*Corresponding author for this work

School of Physics, Harbin Institute of Technology
Southwest Petroleum University China
Harbin Normal University
CAS - Changchun Institute of Applied Chemistry

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

16 Scopus citations

Abstract

The stability of solid oxide fuel cells (SOFCs) cathodes is often severely damaged by impurity poisonings from Cr vapors. Here we report a medium entropy GdBa(Mn_0.2Fe_0.2Co_1.2Ni_0.2Cu_0.2)O_5+δ (ME-GBCO) double perovskite cathode, which exhibits remarkably improved Cr-tolerant ability. The polarization resistance (R_p) of GBCO increases from ∼0.44 to ∼0.70 Ω cm² after 20 h exposure to Cr in air at 700 °C. In contrast, R_p value of ME-GBCO cathode increases from ∼0.16 to ∼0.24 Ω cm² under the same condition. The enhanced operational stability is attributed to the in situ formed BaCoO_3-δ (BCO) nanoparticles on ME-GBCO surface, which is very inactive to Cr vapors. This work highlights that the configuration entropy modulation is an effective avenue for surface engineering and for the development of robust cathode materials for SOFCs.

Original language	English
Pages (from-to)	15076-15084
Number of pages	9
Journal	Ceramics International
Volume	50
Issue number	9
DOIs	https://doi.org/10.1016/j.ceramint.2024.01.426
State	Published - 1 May 2024
Externally published	Yes

Keywords

Cathode
Cr poisoning
Medium-entropy design
Solid oxide fuel cell

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10.1016/j.ceramint.2024.01.426

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@article{b2a7e829ebb6413eba61258fc2e6ad31,

title = "Configuration entropy tailored beneficial surface segregation on double perovskite cathode with enhanced Cr-tolerance for SOFC",

abstract = "The stability of solid oxide fuel cells (SOFCs) cathodes is often severely damaged by impurity poisonings from Cr vapors. Here we report a medium entropy GdBa(Mn0.2Fe0.2Co1.2Ni0.2Cu0.2)O5+δ (ME-GBCO) double perovskite cathode, which exhibits remarkably improved Cr-tolerant ability. The polarization resistance (Rp) of GBCO increases from ∼0.44 to ∼0.70 Ω cm2 after 20 h exposure to Cr in air at 700 °C. In contrast, Rp value of ME-GBCO cathode increases from ∼0.16 to ∼0.24 Ω cm2 under the same condition. The enhanced operational stability is attributed to the in situ formed BaCoO3-δ (BCO) nanoparticles on ME-GBCO surface, which is very inactive to Cr vapors. This work highlights that the configuration entropy modulation is an effective avenue for surface engineering and for the development of robust cathode materials for SOFCs.",

keywords = "Cathode, Cr poisoning, Medium-entropy design, Solid oxide fuel cell",

author = "Mengke Yuan and Zhe Wang and Juntao Gao and Hongru Hao and Zhe Lv and Xiutao Lou and Limin Liu and Lingling Xu and Jingwei Li and Bo Wei",

note = "Publisher Copyright: {\textcopyright} 2024 Elsevier Ltd and Techna Group S.r.l.",

year = "2024",

month = may,

day = "1",

doi = "10.1016/j.ceramint.2024.01.426",

language = "英语",

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TY - JOUR

T1 - Configuration entropy tailored beneficial surface segregation on double perovskite cathode with enhanced Cr-tolerance for SOFC

AU - Yuan, Mengke

AU - Wang, Zhe

AU - Gao, Juntao

AU - Hao, Hongru

AU - Lv, Zhe

AU - Lou, Xiutao

AU - Liu, Limin

AU - Xu, Lingling

AU - Li, Jingwei

AU - Wei, Bo

PY - 2024/5/1

Y1 - 2024/5/1

N2 - The stability of solid oxide fuel cells (SOFCs) cathodes is often severely damaged by impurity poisonings from Cr vapors. Here we report a medium entropy GdBa(Mn0.2Fe0.2Co1.2Ni0.2Cu0.2)O5+δ (ME-GBCO) double perovskite cathode, which exhibits remarkably improved Cr-tolerant ability. The polarization resistance (Rp) of GBCO increases from ∼0.44 to ∼0.70 Ω cm2 after 20 h exposure to Cr in air at 700 °C. In contrast, Rp value of ME-GBCO cathode increases from ∼0.16 to ∼0.24 Ω cm2 under the same condition. The enhanced operational stability is attributed to the in situ formed BaCoO3-δ (BCO) nanoparticles on ME-GBCO surface, which is very inactive to Cr vapors. This work highlights that the configuration entropy modulation is an effective avenue for surface engineering and for the development of robust cathode materials for SOFCs.

AB - The stability of solid oxide fuel cells (SOFCs) cathodes is often severely damaged by impurity poisonings from Cr vapors. Here we report a medium entropy GdBa(Mn0.2Fe0.2Co1.2Ni0.2Cu0.2)O5+δ (ME-GBCO) double perovskite cathode, which exhibits remarkably improved Cr-tolerant ability. The polarization resistance (Rp) of GBCO increases from ∼0.44 to ∼0.70 Ω cm2 after 20 h exposure to Cr in air at 700 °C. In contrast, Rp value of ME-GBCO cathode increases from ∼0.16 to ∼0.24 Ω cm2 under the same condition. The enhanced operational stability is attributed to the in situ formed BaCoO3-δ (BCO) nanoparticles on ME-GBCO surface, which is very inactive to Cr vapors. This work highlights that the configuration entropy modulation is an effective avenue for surface engineering and for the development of robust cathode materials for SOFCs.

KW - Cathode

KW - Cr poisoning

KW - Medium-entropy design

KW - Solid oxide fuel cell

UR - https://www.scopus.com/pages/publications/85184046989

U2 - 10.1016/j.ceramint.2024.01.426

DO - 10.1016/j.ceramint.2024.01.426

M3 - 文章

AN - SCOPUS:85184046989

SN - 0272-8842

VL - 50

SP - 15076

EP - 15084

JO - Ceramics International

JF - Ceramics International

IS - 9

ER -

Configuration entropy tailored beneficial surface segregation on double perovskite cathode with enhanced Cr-tolerance for SOFC

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Keywords

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