Towards high performance durable ceramic fuel cells using a triple conducting perovskite cathode

IF 20.2 1区化学 Q1 CHEMISTRY, PHYSICAL

Applied Catalysis B: Environmental Pub Date : 2024-01-02 DOI:10.1016/j.apcatb.2023.123678

Zhipeng Liu , Heping Xie , Yuan Zhang , Junbiao Li , Junda You , Hongxin Yang , Haojie Zhu , Meng Ni , Zongping Shao , Bin Chen

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Abstract

To guarantee the efficient and durable operation of oxygen ion/proton-conducting ceramic fuel cells, the cathode materials need to be versatile in terms of high activity, good CO₂ resistance, and matched thermal expansion behavior with electrolyte, etc. In this study, we substituted 10% Nb to the B-site of parent perovskite-BaCo_0.7Fe_0.2Y_0.1O_3-δ, to form a single-phase material with triple conducting (H⁺/O^2-/e^-) capability as a highly ORR-active cathode. The doped BaCo_0.6Fe_0.2Y_0.1Nb_0.1O_3-δ (BCFYN) shows promising ORR activity due to the optimized oxygen vacancy, improved hydration capacity, and accelerated charge transfer kinetics. The reduction of thermal expansion coefficient (TEC) and enhanced CO₂ resistance also facilitate the cathode durability. As a result, the area-specific resistances of BCFYN electrode at 550 °C for oxygen-ion and proton conducting symmetrical cells were only 0.106 and 0.24 Ω cm², respectively. These results indicate that BCFYN is a highly promising cathode material for both SOFCs and PCFCs.

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利用三导电包晶阴极开发高性能耐用陶瓷燃料电池

为了保证氧离子/质子传导陶瓷燃料电池的高效持久运行，阴极材料需要具有高活性、良好的抗二氧化碳性能以及与电解质相匹配的热膨胀性能等多功能性。在这项研究中，我们在母包晶-BaCo0.7Fe0.2Y0.1O3-δ的B位上掺入了10%的铌，形成了一种具有三重导电（H+/O2-/e-）能力的单相材料，作为一种高ORR活性阴极。掺杂的 BaCo0.6Fe0.2Y0.1Nb0.1O3-δ （BCFYN）由于优化了氧空位、提高了水合能力和加速了电荷转移动力学而显示出良好的 ORR 活性。热膨胀系数（TEC）的降低和二氧化碳阻力的增强也有利于阴极的耐用性。因此，BCFYN 电极在 550°C 时对氧离子和质子传导对称电池的特定区域电阻分别仅为 0.106 和 0.24 Ω cm2。这些结果表明，BCFYN 对 SOFC 和 PCFC 来说都是一种非常有前途的阴极材料。

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来源期刊

Applied Catalysis B: Environmental 环境科学-工程：化工

CiteScore

38.60

自引率

6.30%

发文量

1117

审稿时长

24 days

期刊介绍： Applied Catalysis B: Environment and Energy (formerly Applied Catalysis B: Environmental) is a journal that focuses on the transition towards cleaner and more sustainable energy sources. The journal's publications cover a wide range of topics, including: 1.Catalytic elimination of environmental pollutants such as nitrogen oxides, carbon monoxide, sulfur compounds, chlorinated and other organic compounds, and soot emitted from stationary or mobile sources. 2.Basic understanding of catalysts used in environmental pollution abatement, particularly in industrial processes. 3.All aspects of preparation, characterization, activation, deactivation, and regeneration of novel and commercially applicable environmental catalysts. 4.New catalytic routes and processes for the production of clean energy, such as hydrogen generation via catalytic fuel processing, and new catalysts and electrocatalysts for fuel cells. 5.Catalytic reactions that convert wastes into useful products. 6.Clean manufacturing techniques that replace toxic chemicals with environmentally friendly catalysts. 7.Scientific aspects of photocatalytic processes and a basic understanding of photocatalysts as applied to environmental problems. 8.New catalytic combustion technologies and catalysts. 9.New catalytic non-enzymatic transformations of biomass components. The journal is abstracted and indexed in API Abstracts, Research Alert, Chemical Abstracts, Web of Science, Theoretical Chemical Engineering Abstracts, Engineering, Technology & Applied Sciences, and others.