A medium-entropy engineered double perovskite oxide for efficient and CO2-tolerant cathode of solid oxide fuel cells

Zhe Wang; Jingwei Li; Mengke Yuan; Juntao Gao; Hongru Hao; Abdalla M. Abdalla; Lingling Xu; Zhe Lv; Bo Wei

doi:10.1016/j.susmat.2024.e00969

A medium-entropy engineered double perovskite oxide for efficient and CO₂-tolerant cathode of solid oxide fuel cells

Zhe Wang
, Jingwei Li
, Mengke Yuan
, Juntao Gao
, Hongru Hao
, Abdalla M. Abdalla
, Lingling Xu
, Zhe Lv
, Bo Wei^*

^*Corresponding author for this work

School of Physics, Harbin Institute of Technology
University of Bayreuth
Suez Canal University
Harbin Normal University

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

33 Scopus citations

Abstract

Developing highly active and robust cathodes remains challenging for solid oxide fuel cells (SOFCs). Therefore, we report an A-site medium-entropy double perovskite oxide PrBa_0.5Sr_0.25Ca_0.2Ce_0.05Co₂O_5+δ (PBSCCC) and its electrocatalytic activity and CO₂ tolerance property are systematically probed. The PBSCCC cathode exhibits excellent oxygen reduction reaction (ORR) activity with a low polarization resistance of 0.027 Ω cm² at 700 °C. More importantly, compared to PrBaCo₂O_5+δ (PBC) and PrBa_0.8Ca_0.2Co₂O_5+δ (PBCC) oxides, its CO₂ resistance is prominently enhanced with significantly less BaCO₃ and Co₃O₄ impurities formed. The superior ORR performance and structure stability are mainly attributed to its high electrical conductivity and significantly reduced surface cation segregations. Our results show that the potential of PBSCCC as a cathode material for SOFCs is enormous and also prove the rationality and feasibility of entropy engineering for cathode development.

Original language	English
Article number	e00969
Journal	Sustainable Materials and Technologies
Volume	40
DOIs	https://doi.org/10.1016/j.susmat.2024.e00969
State	Published - Jul 2024
Externally published	Yes

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 7 Affordable and Clean Energy

Keywords

CO tolerance
Double perovskite cathodes
Medium-entropy
Solid oxide fuel cells
Surface segregation

Access to Document

10.1016/j.susmat.2024.e00969

Cite this

@article{615344a665a1423985b993783ad63f59,

title = "A medium-entropy engineered double perovskite oxide for efficient and CO2-tolerant cathode of solid oxide fuel cells",

abstract = "Developing highly active and robust cathodes remains challenging for solid oxide fuel cells (SOFCs). Therefore, we report an A-site medium-entropy double perovskite oxide PrBa0.5Sr0.25Ca0.2Ce0.05Co2O5+δ (PBSCCC) and its electrocatalytic activity and CO2 tolerance property are systematically probed. The PBSCCC cathode exhibits excellent oxygen reduction reaction (ORR) activity with a low polarization resistance of 0.027 Ω cm2 at 700 °C. More importantly, compared to PrBaCo2O5+δ (PBC) and PrBa0.8Ca0.2Co2O5+δ (PBCC) oxides, its CO2 resistance is prominently enhanced with significantly less BaCO3 and Co3O4 impurities formed. The superior ORR performance and structure stability are mainly attributed to its high electrical conductivity and significantly reduced surface cation segregations. Our results show that the potential of PBSCCC as a cathode material for SOFCs is enormous and also prove the rationality and feasibility of entropy engineering for cathode development.",

keywords = "CO tolerance, Double perovskite cathodes, Medium-entropy, Solid oxide fuel cells, Surface segregation",

author = "Zhe Wang and Jingwei Li and Mengke Yuan and Juntao Gao and Hongru Hao and Abdalla, \{Abdalla M.\} and Lingling Xu and Zhe Lv and Bo Wei",

note = "Publisher Copyright: {\textcopyright} 2024 Elsevier B.V.",

year = "2024",

month = jul,

doi = "10.1016/j.susmat.2024.e00969",

language = "英语",

volume = "40",

journal = "Sustainable Materials and Technologies",

issn = "2214-9929",

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TY - JOUR

T1 - A medium-entropy engineered double perovskite oxide for efficient and CO2-tolerant cathode of solid oxide fuel cells

AU - Wang, Zhe

AU - Li, Jingwei

AU - Yuan, Mengke

AU - Gao, Juntao

AU - Hao, Hongru

AU - Abdalla, Abdalla M.

AU - Xu, Lingling

AU - Lv, Zhe

AU - Wei, Bo

PY - 2024/7

Y1 - 2024/7

N2 - Developing highly active and robust cathodes remains challenging for solid oxide fuel cells (SOFCs). Therefore, we report an A-site medium-entropy double perovskite oxide PrBa0.5Sr0.25Ca0.2Ce0.05Co2O5+δ (PBSCCC) and its electrocatalytic activity and CO2 tolerance property are systematically probed. The PBSCCC cathode exhibits excellent oxygen reduction reaction (ORR) activity with a low polarization resistance of 0.027 Ω cm2 at 700 °C. More importantly, compared to PrBaCo2O5+δ (PBC) and PrBa0.8Ca0.2Co2O5+δ (PBCC) oxides, its CO2 resistance is prominently enhanced with significantly less BaCO3 and Co3O4 impurities formed. The superior ORR performance and structure stability are mainly attributed to its high electrical conductivity and significantly reduced surface cation segregations. Our results show that the potential of PBSCCC as a cathode material for SOFCs is enormous and also prove the rationality and feasibility of entropy engineering for cathode development.

AB - Developing highly active and robust cathodes remains challenging for solid oxide fuel cells (SOFCs). Therefore, we report an A-site medium-entropy double perovskite oxide PrBa0.5Sr0.25Ca0.2Ce0.05Co2O5+δ (PBSCCC) and its electrocatalytic activity and CO2 tolerance property are systematically probed. The PBSCCC cathode exhibits excellent oxygen reduction reaction (ORR) activity with a low polarization resistance of 0.027 Ω cm2 at 700 °C. More importantly, compared to PrBaCo2O5+δ (PBC) and PrBa0.8Ca0.2Co2O5+δ (PBCC) oxides, its CO2 resistance is prominently enhanced with significantly less BaCO3 and Co3O4 impurities formed. The superior ORR performance and structure stability are mainly attributed to its high electrical conductivity and significantly reduced surface cation segregations. Our results show that the potential of PBSCCC as a cathode material for SOFCs is enormous and also prove the rationality and feasibility of entropy engineering for cathode development.

KW - CO tolerance

KW - Double perovskite cathodes

KW - Medium-entropy

KW - Solid oxide fuel cells

KW - Surface segregation

UR - https://www.scopus.com/pages/publications/85193041612

U2 - 10.1016/j.susmat.2024.e00969

DO - 10.1016/j.susmat.2024.e00969

M3 - 文章

AN - SCOPUS:85193041612

SN - 2214-9929

VL - 40

JO - Sustainable Materials and Technologies

JF - Sustainable Materials and Technologies

M1 - e00969

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