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

Yu-Shi Feng ¹Yu Shen ¹Fang Wang ²Chuan Tian ³Qin-Yi Hu ⁴Qian Duan ¹Jing-Wei Li ⁴Di Bao⁴

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作者信息

1. School of Materials Science and Engineering,Changchun University of Science and Technology,Changchun 130022,China
2. 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
3. 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
4. State Key Laboratory of Rare Earth Resource Utilization,Changchun Institute of Applied Chemistry Chinese Academy of Sciences,Changchun 130022,China
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Abstract

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.

Key words

Reversible protonic ceramic electrochemical cells/Perovskite oxide/Oxygen electrode/Ta element doping/Oxygen defects

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基金项目

National Key R&D Program of China(2022YFB4002201)

National Natural Science Foundation of China(52072362)

National Natural Science Foundation of China(52302119)

Jilin Province Science and Technology Development Plan Funding Project(SKL202302039)

Jilin Province Science and Technology Development Plan Funding Project(20220201112GX)

Jiangsu Province Innovation Support Program(BE2023092-2)

Youth Innovation Promotion Association CAS(2021223)

Open Funds of the State Key Laboratory of Rare Earth Resource Utilization(RERU2022008)

出版年

2024

稀有金属(英文版)

中国有色金属学会

稀有金属(英文版)

CSTPCDCSCDEI

影响因子：0.801

ISSN：1001-0521

参考文献量2

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