In-situ segregation of A-site defect (La0.6Sr0.4)0.90Co0.2Fe0.8O3-δ to form a high-performance solid oxide fuel cell cathode material with heterostructure

被引：32

作者：

Bai, Jinghe ^{[1
]}

Zhou, Defeng ^{[1
]}

Zhu, Xiaofei ^{[1
]}

Wang, Ning ^{[2
,3
,5
]}

Chen, Ruyi ^{[1
]}

Wang, Bolin ^{[1
]}

Yan, Wenfu ^{[4
]}

机构：

[1] Changchun Univ Technol, Sch Chem & Life Sci, Changchun 130012, Peoples R China

[2] Shenzhen Inst Adv Elect Mat, Shenzhen 518103, Peoples R China

[3] Chinese Acad Sci, Shenzhen Inst Adv Technol, Shenzhen 518055, Peoples R China

[4] Jilin Univ, Coll Chem, State Key Lab Inorgan Synth & Preparat Chem, Changchun 130012, Peoples R China

[5] Shenzhen Inst Adv Elect Mat, Shenzhen 518103, Peoples R China

来源：

CERAMICS INTERNATIONAL | 2023年 / 49卷 / 04期

基金：

中国国家自然科学基金;

关键词：

Solid oxide fuel cell; Cathode materials; A-site defects; Sr segregation; Heterostructure; PEROVSKITE; SURFACE; INTERFACE; ENERGY; X=0; CO; LA0.6SR0.4CO0.2FE0.8O3-DELTA; DEFICIENCY; STABILITY; STRONTIUM;

D O I：

10.1016/j.ceramint.2022.10.295

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

As a potential cathode material for solid oxide fuel cells, the commercial application of La0.6Sr0.4Co0.2Fe0.8O3-delta (LSCF) has to face the challenges in insufficient oxygen reduction reaction (ORR) activity, segregation of Sr element, and CO2 poisoning. Therefore, the effect of A-site non-stoichiometry on the electrochemical perfor-mance of (LS)(1-x)CFs (x =-0.05, 0, 0.05, 0.10, 0.15) from the aspect of microstructure/elemental surface chemical environment evolution is investigated in this paper. The results show that (LS)(0.90)CF has the best ORR activity and the highest electrochemical performance. The excellent electrochemical performance is attributed to the (LS)(0.90)CF/Co2FeO4/CoFe2O4-type heterostructure, formed by in-situ segregation induced by A-site defects, which improves the surface oxygen diffusion coefficient and chemical bulk diffusion coefficient of the cathode. At the same time, the A-site defect can effectively inhibit the segregation of Sr element in (LS)(0.90)CF, thereby improving the tolerance of CO2. At 800 degrees C, the area-specific resistance (ASR) of (LS)(0.90)CF (0.023 Omega cm(2)) is 66.7% lower than that of LSCF (0.069 Omega cm(2)), and the peak power density (1.57 Wcm(-2)) is 1.8 times higher than that of LSCF (0.87 Wcm(-2)). Therefore, perovskite A-site defect-induced B-site segregation to form hetero-structures provides an effective strategy for the preparation of high-performance cathode materials.

引用

页码：5687 / 5699

页数：13

共 55 条

[1] Investigating the effect of Cu-doping on the electrochemical properties of perovskite-type Ba0.5Sr0.5Fe1-xCux(0 ≤ x ≤ 0.20) cathodes [J].

Abubaker, Orrsam Aadil ;

Singh, Kalpana ;

Thangadurai, Venkataraman .

JOURNAL OF POWER SOURCES, 2020, 451

[2]

Anbo Y., 2020, J. Alloy. Compd., V837

[3] Preparation of 3D structure high performance Ba0.5Sr0.5Fe0.8Cu0.2O3-δ nanofiber SOFC cathode material by low-temperature calcination method [J].

Bai, Jinghe ;

Han, Zhiying ;

Lv, Bu ;

Chen, Xu ;

Zhu, Xiaofei ;

Zhou, Defeng .

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, 2021, 46 (11) :8132-8142

[4] The influence of A-site deficiency on the electrochemical properties of (Ba0.95La0.05)1-xFeO3-δ as an intermediate temperature solid oxide fuel cell cathode [J].

Belotti, Alessio ;

Wang, Yuhao ;

Curcio, Antonino ;

Liu, Jiapeng ;

Quattrocchi, Emanuele ;

Pepe, Simona ;

Ciucci, Francesco .

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, 2022, 47 (02) :1229-1240

[5] Performance of SrCo1-xIrxO3-δ (x=0.10 and 0.15) Perovskites as Potential Cathode Materials for Intermediate-Temperature Solid Oxide Fuel Cells (IT-SOFC) [J].

Cascos, V ;

Troncoso, L. ;

Larralde, A. L. ;

Fernandez-Diaz, M. T. ;

Alonso, J. A. .

ACS APPLIED ENERGY MATERIALS, 2020, 3 (07) :6709-6716

[6] Enhanced catalytic activity of nanostructured, A-site deficient (La0.7Sr0.3)0.95(Co0.2Fe0.8)O3-δ for SOFC cathodes [J].

Celikbilek, Ozden ;

Thieu, Cam-Anh ;

Agnese, Fabio ;

Cali, Eleonora ;

Lenser, Christian ;

Menzler, Norbert H. ;

Son, Ji-Won ;

Skinner, Stephen J. ;

Djurado, Elisabeth .

JOURNAL OF MATERIALS CHEMISTRY A, 2019, 7 (43) :25102-25111

[7] Improving the Electrocatalytic Activity and Durability of the La0.6Sr0.4Co0.2Fe0.8O3-δ Cathode by Surface Modification [J].

Chen, Huijun ;

Guo, Zheng ;

Zhang, Lei A. ;

Li, Yifeng ;

Li, Fei ;

Zhang, Yapeng ;

Chen, Yu ;

Wang, Xinwei ;

Yu, Bo ;

Shi, Jian-min ;

Liu, Jiang ;

Yang, Chenghao ;

Cheng, Shuang ;

Chen, Yan ;

Liu, Meilin .

ACS APPLIED MATERIALS & INTERFACES, 2018, 10 (46) :39785-39793

[8] Pr2NiO4-Pr0.2Ce0.8O1.9 composite cathode as a potential cathode material for intermediate temperature solid oxide fuel cells [J].

Chen, Xu ;

Wang, Jianqiu ;

Liang, Qingwen ;

Sun, Xi ;

Zhu, Xiaofei ;

Zhou, Defeng ;

Meng, Jian .

SOLID STATE SCIENCES, 2020, 100

[9] An effective strategy to enhancing tolerance to contaminants poisoning of solid oxide fuel cell cathodes [J].

Chen, Yu ;

Yoo, Seonyoung ;

Li, Xiaxi ;

Ding, Dong ;

Pei, Kai ;

Chen, Dongchang ;

Ding, Yong ;

Zhao, Bote ;

Murphy, Ryan ;

Deglee, Ben ;

Liu, Jiang ;

Liu, Meilin .

NANO ENERGY, 2018, 47 :474-480

[10] Enhanced stability of solid oxide fuel cells by employing a modified cathode-interlayer interface with a dense La0.6Sr0.4Co0.2Fe0.8O3-δ thin film [J].

De Vero, Jeffrey C. ;

Develos-Bagarinao, Katherine ;

Kishimoto, Haruo ;

Ishiyama, Tomohiro ;

Yamaji, Katsuhiko ;

Horita, Teruhisa ;

Yokokawa, Harumi .

JOURNAL OF POWER SOURCES, 2018, 377 :128-135

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