High-entropy perovskite oxide BaCo0.2Fe0.2Zr0.2Sn0.2Pr0.2O3-δ with triple conduction for the air electrode of reversible protonic ceramic cells

被引：29

作者：

Sun, Jiaxiang ^{[1
]}

Ren, Rongzheng ^{[1
]}

Yue, Hualiang ^{[1
]}

Cui, Wencan ^{[1
]}

Wang, Gaige ^{[1
]}

Xu, Chunming ^{[1
]}

Qiao, Jinshuo ^{[1
]}

Sun, Wang ^{[1
]}

Sun, Kening ^{[1
]}

Wang, Zhenhua ^{[1
]}

机构：

[1] Beijing Inst Technol, Sch Chem & Chem Engn, Beijing Key Lab Chem Power Source & Green Catalysi, Beijing 100081, Peoples R China

来源：

CHINESE CHEMICAL LETTERS | 2023年 / 34卷 / 07期

基金：

中国国家自然科学基金; 中国博士后科学基金;

关键词：

High-entropy perovskite oxide; Triple-conducting oxide; Air electrode; Reversible protonic ceramic cells; Hydrogen production;

D O I：

10.1016/j.cclet.2022.107776

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Reversible protonic ceramic cells (RPCCs) show great potential as new-generation energy conversion and storage devices. However, the mature development of RPCCs is seriously hindered by the inactivity and poor stability of air electrodes exposed to concentrated vapor under operating conditions. Herein, we report a high-entropy air electrode with the composition BaCo0.2Fe0.2Zr0.2Sn0.2Pr0.2O3-delta (BCFZSP), which shows integrated electronic, protonic and oxygenic conduction in a single perovskite phase and excellent structural stability in concentrated steam. Such triple conduction can spread the electrochemically ac-tive sites of the air electrode to the overall electrode surface, thus optimizing the kinetics of the oxygen reduction and evolution reactions (0.448 Q cm2 of polarization resistance at 550 degrees C). As-prepared RPCCs with a BCFZSP air electrode at 600 degrees C achieved a peak power density of 0.68 W/cm2 in fuel-cell mode and a current density of 0.92 A/cm2 under a 1.3 V applied voltage in electrolysis mode. More importantly, the RPCCs demonstrate an encouragingly high stability during 120 h of reversible switching between the fuel -cell and electrolysis modes. Given their excellent performance, high-entropy perovskites can be promising electrode materials for RPCCs.(c) 2023 Published by Elsevier B.V. on behalf of Chinese Chemical Society and Institute of Materia Medica, Chinese Academy of Medical Sciences.

引用

页数：5

共 21 条

[21] An Active and Robust Air Electrode for Reversible Protonic Ceramic Electrochemical Cells [J].

Zhou, Yucun ;

Liu, Enzuo ;

Chen, Yu ;

Liu, Yuchen ;

Zhang, Lei ;

Zhang, Weilin ;

Luo, Zheyu ;

Kane, Nicholas ;

Zhao, Bote ;

Soule, Luke ;

Niu, Yinghua ;

Ding, Yong ;

Ding, Hanping ;

Ding, Dong ;

Liu, Meilin .

ACS ENERGY LETTERS, 2021, 6 (04) :1511-1520

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