首页|Robust tantalum tuned perovskite oxygen electrode for reversible protonic ceramic electrochemical cells

Robust tantalum tuned perovskite oxygen electrode for reversible protonic ceramic electrochemical cells

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Perovskite oxides with diverse composition and structure have exhibited grand advances in boosting the oxygen reduction and evolution reaction(ORR/OER),which are essential for the reversible protonic ceramic electrochemical cell(R-PCEC)toward the sustainable hydrogen production and utilization.However,enhance-ment of their activity and stability remains challenging.Herein,we develop the Ta-regulated BaCo0.7Fe0.3O3-δperovskite oxygen electrode(Ba(Co0.7Fe0.3)1-xTaxO3-δ)with abundant oxygen defects and achieve the simultane-ous enhancement in the electrocatalytic activity and sta-bility toward ORR and OER.As-fabricated R-PCEC with Ba(Co0.7Fe0.3)0.9Ta0.1O3-δ(BCFT10)oxygen electrode performs high power density of 1.47 W·cm-2 at 650 ℃ in fuel cell mode,and the current density is up to-2.11 A.cm-2 at 1.4 V at 650 ℃ in electrolysis mode,as well as the good stability in both the fuel cell and elec-trolysis modes.Importantly,the cell also demonstrates a stable cycling operation between fuel cell and electrolysis mode,suggesting a great potential of BCFT10 as oxygen electrode material for R-PCECs.

Reversible protonic ceramic electrochemical cellsPerovskite oxideOxygen electrodeTa element dopingOxygen defects

Yu-Shi Feng、Yu Shen、Fang Wang、Chuan Tian、Qin-Yi Hu、Qian Duan、Jing-Wei Li、Di Bao

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School of Materials Science and Engineering,Changchun University of Science and Technology,Changchun 130022,China

Zhongshan Institute of Changchun University of Science and Technology,Zhongshan 528437,China

State Key Laboratory of Rare Earth Resource Utilization,Changchun Institute of Applied Chemistry Chinese Academy of Sciences,Changchun 130022,China

Key Laboratory of Preparation and Applications of Environmental Friendly Materials,Ministry of Education,Jilin Normal University,Changchun 130103,China

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National Key R&D Program of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaJilin Province Science and Technology Development Plan Funding ProjectJilin Province Science and Technology Development Plan Funding ProjectJiangsu Province Innovation Support ProgramYouth Innovation Promotion Association CASOpen Funds of the State Key Laboratory of Rare Earth Resource Utilization

2022YFB40022015207236252302119SKL20230203920220201112GXBE2023092-22021223RERU2022008

2024

10.1007/s12598-024-02691-z

稀有金属(英文版)
中国有色金属学会

稀有金属(英文版)

CSTPCDEI
影响因子：0.801
ISSN：1001-0521
年,卷(期)：2024.43(7)
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