Exceptionally High Performance Anode Material Based on Lattice Structure Decorated Double Perovskite Sr2FeMo2/3Mg1/3O6−                         Δ for Solid Oxide Fuel Cells

Zhihong Du; Hailei Zhao; Shanming Li; Yang Zhang; Xiwang Chang; Qing Xia; Ning Chen; Lin Gu; Konrad Świerczek; Yan Li; Tianrang Yang; Ke An

doi:10.1002/aenm.201800062

Exceptionally High Performance Anode Material Based on Lattice Structure Decorated Double Perovskite Sr₂FeMo_2/3Mg_1/3O₆₋ _Δ for Solid Oxide Fuel Cells

Zhihong Du, Hailei Zhao, Shanming Li, Yang Zhang, Xiwang Chang, Qing Xia, Ning Chen, Lin Gu, Konrad Świerczek, Yan Li, Tianrang Yang, Ke An

Materials Engineering

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

74 Scopus citations

Abstract

A novel double perovskite Sr₂FeMo_2/3Mg_1/3O₆₋ _δ is prepared and characterized as an anode material for solid oxide fuel cells (SOFCs). X-ray diffraction refinement reveals that Mg and Mo cations locate separately in two different B sites (B and B′ in A₂BB′O₆) while Fe occupies both B and B′ sites, forming the lattice structure with the form of Sr₂(Mg_1/3Fe_2/3)(Mo_2/3Fe_1/3)O₆₋ _δ. The inactive element Mg doping not only endows the material with excellent redox structural stability but also triggers the creation of antisite defects in the crystal lattice, which provide the material with excellent electrochemical activity. The anode performance of Sr₂FeMo_2/3Mg_1/3O₆₋ _δ is characterized in an La_0.8Sr_0.2Ga_0.8Mg_0.2O₃₋ _δ electrolyte supported cell with La_0.58Sr_0.4Fe_0.8Co_0.2O₃₋ _δ cathode. A peak power density of 531, 803, 1038, and 1316 mW cm⁻² at 750, 800, 850, and 900 °C, respectively, is achieved in humidified H₂. The Sr₂FeMo_2/3Mg_1/3O₆₋ _δ shows suitable thermal expansion coefficient (16.9(2) × 10⁻⁶ K⁻¹), high electrical conductivity, and good tolerance to carbon deposition and sulfur poisoning. First-principle computations demonstrate that the presence of Fe_BOFe_B′ bonds can promote the easy formation and fast migration of oxygen vacancies in the lattice, which are the key to affecting the anode reaction kinetics. The excellent overall performance of Sr₂FeMo_2/3Mg_1/3O₆₋ _δ compound makes it a promising anode material for SOFCs.

Original language	English
Article number	1800062
Journal	Advanced Energy Materials
Volume	8
Issue number	18
DOIs	https://doi.org/10.1002/aenm.201800062
State	Published - Jun 25 2018

Funding

This work was financially supported by National Basic Research Program of China (2013CB934003), National Nature Science Foundation of China (U1637202, 51634003), China Postdoctoral Science Foundation (2016M600041), Fundamental Research Funds for the Central Universities (FRF-TP-16-033A1), and Program of Introducing Talents of Discipline to Universities (B14003).

Funders	Funder number
National Natural Science Foundation of China	51634003, U1637202
China Postdoctoral Science Foundation	2016M600041
National Key Research and Development Program of China	2013CB934003
Project 211	B14003
Fundamental Research Funds for the Central Universities	FRF-TP-16-033A1

Keywords

antisite defects
double perovskite
oxygen surface exchange
redox stability
solid oxide fuel cells

UN SDGs

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

Access to Document

10.1002/aenm.201800062

Cite this

Du, Z., Zhao, H., Li, S., Zhang, Y., Chang, X., Xia, Q., Chen, N., Gu, L., Świerczek, K., Li, Y., Yang, T., & An, K. (2018). Exceptionally High Performance Anode Material Based on Lattice Structure Decorated Double Perovskite Sr₂FeMo_2/3Mg_1/3O₆₋ _Δ for Solid Oxide Fuel Cells. Advanced Energy Materials, 8(18), Article 1800062. https://doi.org/10.1002/aenm.201800062

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title = "Exceptionally High Performance Anode Material Based on Lattice Structure Decorated Double Perovskite Sr2FeMo2/3Mg1/3O6− Δ for Solid Oxide Fuel Cells",

abstract = "A novel double perovskite Sr2FeMo2/3Mg1/3O6− δ is prepared and characterized as an anode material for solid oxide fuel cells (SOFCs). X-ray diffraction refinement reveals that Mg and Mo cations locate separately in two different B sites (B and B′ in A2BB′O6) while Fe occupies both B and B′ sites, forming the lattice structure with the form of Sr2(Mg1/3Fe2/3)(Mo2/3Fe1/3)O6− δ. The inactive element Mg doping not only endows the material with excellent redox structural stability but also triggers the creation of antisite defects in the crystal lattice, which provide the material with excellent electrochemical activity. The anode performance of Sr2FeMo2/3Mg1/3O6− δ is characterized in an La0.8Sr0.2Ga0.8Mg0.2O3− δ electrolyte supported cell with La0.58Sr0.4Fe0.8Co0.2O3− δ cathode. A peak power density of 531, 803, 1038, and 1316 mW cm−2 at 750, 800, 850, and 900 °C, respectively, is achieved in humidified H2. The Sr2FeMo2/3Mg1/3O6− δ shows suitable thermal expansion coefficient (16.9(2) × 10−6 K−1), high electrical conductivity, and good tolerance to carbon deposition and sulfur poisoning. First-principle computations demonstrate that the presence of FeBOFeB′ bonds can promote the easy formation and fast migration of oxygen vacancies in the lattice, which are the key to affecting the anode reaction kinetics. The excellent overall performance of Sr2FeMo2/3Mg1/3O6− δ compound makes it a promising anode material for SOFCs.",

keywords = "antisite defects, double perovskite, oxygen surface exchange, redox stability, solid oxide fuel cells",

author = "Zhihong Du and Hailei Zhao and Shanming Li and Yang Zhang and Xiwang Chang and Qing Xia and Ning Chen and Lin Gu and Konrad {\'S}wierczek and Yan Li and Tianrang Yang and Ke An",

note = "Publisher Copyright: {\textcopyright} 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim",

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Du, Z, Zhao, H, Li, S, Zhang, Y, Chang, X, Xia, Q, Chen, N, Gu, L, Świerczek, K, Li, Y, Yang, T & An, K 2018, 'Exceptionally High Performance Anode Material Based on Lattice Structure Decorated Double Perovskite Sr₂FeMo_2/3Mg_1/3O₆₋ _Δ for Solid Oxide Fuel Cells', Advanced Energy Materials, vol. 8, no. 18, 1800062. https://doi.org/10.1002/aenm.201800062

TY - JOUR

T1 - Exceptionally High Performance Anode Material Based on Lattice Structure Decorated Double Perovskite Sr2FeMo2/3Mg1/3O6− Δ for Solid Oxide Fuel Cells

AU - Du, Zhihong

AU - Zhao, Hailei

AU - Li, Shanming

AU - Zhang, Yang

AU - Chang, Xiwang

AU - Xia, Qing

AU - Chen, Ning

AU - Gu, Lin

AU - Świerczek, Konrad

AU - Li, Yan

AU - Yang, Tianrang

AU - An, Ke

PY - 2018/6/25

Y1 - 2018/6/25

N2 - A novel double perovskite Sr2FeMo2/3Mg1/3O6− δ is prepared and characterized as an anode material for solid oxide fuel cells (SOFCs). X-ray diffraction refinement reveals that Mg and Mo cations locate separately in two different B sites (B and B′ in A2BB′O6) while Fe occupies both B and B′ sites, forming the lattice structure with the form of Sr2(Mg1/3Fe2/3)(Mo2/3Fe1/3)O6− δ. The inactive element Mg doping not only endows the material with excellent redox structural stability but also triggers the creation of antisite defects in the crystal lattice, which provide the material with excellent electrochemical activity. The anode performance of Sr2FeMo2/3Mg1/3O6− δ is characterized in an La0.8Sr0.2Ga0.8Mg0.2O3− δ electrolyte supported cell with La0.58Sr0.4Fe0.8Co0.2O3− δ cathode. A peak power density of 531, 803, 1038, and 1316 mW cm−2 at 750, 800, 850, and 900 °C, respectively, is achieved in humidified H2. The Sr2FeMo2/3Mg1/3O6− δ shows suitable thermal expansion coefficient (16.9(2) × 10−6 K−1), high electrical conductivity, and good tolerance to carbon deposition and sulfur poisoning. First-principle computations demonstrate that the presence of FeBOFeB′ bonds can promote the easy formation and fast migration of oxygen vacancies in the lattice, which are the key to affecting the anode reaction kinetics. The excellent overall performance of Sr2FeMo2/3Mg1/3O6− δ compound makes it a promising anode material for SOFCs.

AB - A novel double perovskite Sr2FeMo2/3Mg1/3O6− δ is prepared and characterized as an anode material for solid oxide fuel cells (SOFCs). X-ray diffraction refinement reveals that Mg and Mo cations locate separately in two different B sites (B and B′ in A2BB′O6) while Fe occupies both B and B′ sites, forming the lattice structure with the form of Sr2(Mg1/3Fe2/3)(Mo2/3Fe1/3)O6− δ. The inactive element Mg doping not only endows the material with excellent redox structural stability but also triggers the creation of antisite defects in the crystal lattice, which provide the material with excellent electrochemical activity. The anode performance of Sr2FeMo2/3Mg1/3O6− δ is characterized in an La0.8Sr0.2Ga0.8Mg0.2O3− δ electrolyte supported cell with La0.58Sr0.4Fe0.8Co0.2O3− δ cathode. A peak power density of 531, 803, 1038, and 1316 mW cm−2 at 750, 800, 850, and 900 °C, respectively, is achieved in humidified H2. The Sr2FeMo2/3Mg1/3O6− δ shows suitable thermal expansion coefficient (16.9(2) × 10−6 K−1), high electrical conductivity, and good tolerance to carbon deposition and sulfur poisoning. First-principle computations demonstrate that the presence of FeBOFeB′ bonds can promote the easy formation and fast migration of oxygen vacancies in the lattice, which are the key to affecting the anode reaction kinetics. The excellent overall performance of Sr2FeMo2/3Mg1/3O6− δ compound makes it a promising anode material for SOFCs.

KW - antisite defects

KW - double perovskite

KW - oxygen surface exchange

KW - redox stability

KW - solid oxide fuel cells

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