Low Area Specific Resistance La-Doped Bi2O3 Nanocomposite Thin Film Cathodes for Solid Oxide Fuel Cell Applications

IF 9.6 1区材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY Nano Letters Pub Date : 2024-11-26 DOI:10.1021/acs.nanolett.4c03679

Adam J. Lovett, Matthew P. Wells, Yizhi Zhang, Jiawei Song, Thomas S. Miller, Haiyan Wang, Judith L. MacManus-Driscoll

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Abstract

In the context of solid oxide fuel cells (SOFCs), vertically aligned nanocomposite (VAN) thin films have emerged as a leading material type to overcome performance limitations in cathodes. Such VAN films combine conventional cathodes like La_xSr_1–xCo_yFe_1–yO₃ (LSCF) and La_1–xSr_xMnO₃ (LSM) together with highly O^2– ionic conducting materials including yttria-stabilized zirconia (YSZ) or doped CeO₂. Next-generation SOFCs will benefit from the exceptionally high ionic conductivity (1 S cm^–1 at 730 °C) of Bi₂O₃-based materials. Therefore, an opportunity exists to develop Bi₂O₃-based VAN cathodes. Herein, we present the first growth and characterization of a Bi₂O₃-based VAN cathode, containing epitaxial La-doped Bi₂O₃ (LDBO) columns embedded in a LSM matrix. Our novel VANs exhibit low area specific resistance (ASR) (8.3 Ω cm² at 625 °C), representing ∼3 orders of magnitude reduction compared to planar LSM. Therefore, by demonstrating a high-performance Bi₂O₃-based cathode, this work provides an important foundation for future Bi₂O₃-based VAN SOFCs.

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用于固体氧化物燃料电池的低面积比电阻 La 掺杂 Bi2O3 纳米复合薄膜阴极

在固体氧化物燃料电池（SOFC）方面，垂直排列纳米复合（VAN）薄膜已成为克服阴极性能限制的主要材料类型。这种 VAN 薄膜将 LaxSr1-xCoyFe1-yO3 (LSCF) 和 La1-xSrxMnO3 (LSM) 等传统阴极与包括钇稳定氧化锆 (YSZ) 或掺杂 CeO2 在内的高 O2- 离子导电材料结合在一起。下一代 SOFC 将受益于基于 Bi2O3 材料的超高离子导电性（730 °C 时为 1 S cm-1）。因此，开发基于 Bi2O3 的 VAN 阴极是一个机会。在此，我们首次展示了基于 Bi2O3 的 VAN 阴极的生长和表征，这种阴极包含嵌入 LSM 基质中的外延 La 掺杂 Bi2O3 (LDBO) 柱。我们的新型 VAN 具有较低的面积比电阻 (ASR)（625 ℃ 时为 8.3 Ω cm2），与平面 LSM 相比降低了 3 个数量级。因此，通过展示基于 Bi2O3 的高性能阴极，这项工作为未来基于 Bi2O3 的 VAN SOFC 奠定了重要基础。

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来源期刊

Nano Letters 工程技术-材料科学：综合

CiteScore

16.80

自引率

2.80%

发文量

1182

审稿时长

1.4 months

期刊介绍： Nano Letters serves as a dynamic platform for promptly disseminating original results in fundamental, applied, and emerging research across all facets of nanoscience and nanotechnology. A pivotal criterion for inclusion within Nano Letters is the convergence of at least two different areas or disciplines, ensuring a rich interdisciplinary scope. The journal is dedicated to fostering exploration in diverse areas, including: - Experimental and theoretical findings on physical, chemical, and biological phenomena at the nanoscale - Synthesis, characterization, and processing of organic, inorganic, polymer, and hybrid nanomaterials through physical, chemical, and biological methodologies - Modeling and simulation of synthetic, assembly, and interaction processes - Realization of integrated nanostructures and nano-engineered devices exhibiting advanced performance - Applications of nanoscale materials in living and environmental systems Nano Letters is committed to advancing and showcasing groundbreaking research that intersects various domains, fostering innovation and collaboration in the ever-evolving field of nanoscience and nanotechnology.