Investigate the performance of Sm and Nb co-doping Sm1-xBaxFe0.9Nb0.1O3-δ symmetrical electrode for solid oxide fuel cells

IF 3 4区材料科学 Q3 CHEMISTRY, PHYSICAL Solid State Ionics Pub Date : 2024-11-22 DOI:10.1016/j.ssi.2024.116741

Yunfei Li , Qian Zhai , Chengyi Wen , Chunling Lu , Dongchao Qiu , Bingbing Niu , Biao Wang

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Abstract

Sm and Nb co-doping Sm_1-xBa_xFe_0.9Nb_0.1O_3-δ (x = 0.05,0.10,0.15, abbreviated as SBFN05, SBFN10 and SBFN15) oxide was prepared and investigated as an electrode for symmetrical solid oxide fuel cells (SSOFCs). XRD results demonstrate that Sm_1-xBa_{_x}Fe_0.9Nb_0.1O_3-δ samples form a stable cubic perovskite structure both in air and in H₂ atmosphere. Among Sm_1-xBa_xFe_0.9Nb_0.1O_3-δ samples, SBFN05 exhibits the lowest polarization resistance (Rp) at 600–800 °C. At 800 °C, the Rp of SBFN05 symmetrical electrode is 0.021 Ω cm² in air and 0.2 Ω cm² in H₂, respectively. The Rp of SBFN05 electrode has good stability in air and in H₂ during 100 h short-term test. At 850 °C, The maximum power density of single cell with SBFN05 symmetrical electrode feed with H₂ fuel reaches 928.6 mWcm⁻². Compared with BaFeO_3-δ, SBFN05 has lower binding energy and its O 2P center is closer to Fermi energy, suggesting good structural stability and oxygen catalytic activity. The primary result suggests that SBFN05 is a potential candidate symmetrical electrode for IT-SOFCs.

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研究用于固体氧化物燃料电池的 Sm1-xBaxFe0.9Nb0.1O3-δ 对称电极的 Sm 和 Nb 共掺杂性能

制备了 Sm1-xBaxFe0.9Nb0.1O3-δ （x = 0.05、0.10、0.15，缩写为 SBFN05、SBFN10 和 SBFN15）氧化物，并将其作为对称固体氧化物燃料电池（SSOFC）的电极进行了研究。XRD 结果表明，Sm1-xBaxFe0.9Nb0.1O3-δ 样品在空气和 H2 大气中都形成了稳定的立方包晶结构。在 Sm1-xBaxFe0.9Nb0.1O3-δ 样品中，SBFN05 在 600-800 °C 时表现出最低的极化电阻（Rp）。在 800 °C 时，SBFN05 对称电极在空气中的 Rp 为 0.021 Ω cm2，在 H2 中的 Rp 为 0.2 Ω cm2。在 100 小时的短期试验中，SBFN05 电极在空气和 H2 中的 Rp 具有良好的稳定性。在 850 °C 时，使用 SBFN05 对称电极馈入 H2 燃料的单电池的最大功率密度达到 928.6 mWcm-2。与 BaFeO3-δ 相比，SBFN05 的结合能更低，其 O 2P 中心更接近费米能，这表明其具有良好的结构稳定性和氧催化活性。主要结果表明，SBFN05 是 IT-SOFCs 的潜在候选对称电极。

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来源期刊

Solid State Ionics 物理-物理：凝聚态物理

CiteScore

6.10

自引率

3.10%

发文量

152

审稿时长

58 days

期刊介绍： This interdisciplinary journal is devoted to the physics, chemistry and materials science of diffusion, mass transport, and reactivity of solids. The major part of each issue is devoted to articles on: (i) physics and chemistry of defects in solids; (ii) reactions in and on solids, e.g. intercalation, corrosion, oxidation, sintering; (iii) ion transport measurements, mechanisms and theory; (iv) solid state electrochemistry; (v) ionically-electronically mixed conducting solids. Related technological applications are also included, provided their characteristics are interpreted in terms of the basic solid state properties. Review papers and relevant symposium proceedings are welcome.