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

Year: 2024

Type: article

Abstract: High Resolution Image Download MS PowerPoint Slide 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 x Sr 1– x Co y Fe 1– y O 3 (LSCF) and La 1–x Sr x MnO 3 (LSM) together with highly O 2– ionic conducting materials including yttria-stabilized zirconia (YSZ) or doped CeO 2 . Next-generation SOFCs will benefit from the exceptionally high ionic conductivity (1 S cm –1 at 730 °C) of Bi 2 O 3 -based materials. Therefore, an opportunity exists to develop Bi 2 O 3 -based VAN cathodes. Herein, we present the first growth and characterization of a Bi 2 O 3 -based VAN cathode, containing epitaxial La-doped Bi 2 O 3 (LDBO) columns embedded in a LSM matrix. Our novel VANs exhibit low area specific resistance (ASR) (8.3 Ω cm 2 at 625 °C), representing ∼3 orders of magnitude reduction compared to planar LSM. Therefore, by demonstrating a high-performance Bi 2 O 3 -based cathode, this work provides an important foundation for future Bi 2 O 3 -based VAN SOFCs.

Source: Nano Letters

DOI: 10.1021/acs.nanolett.4c03679

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

Institutions: University of Cambridge, University College London, Purdue University West Lafayette

Language: English

Topic: Advancements in Solid Oxide Fuel Cells

Subfield: Materials Chemistry

Field: Materials Science

Domain: Physical Sciences

SDG: Affordable and clean energy

Open Access status: hybrid

Estimated APC paid: $4,500

Funders: National Science Foundation, Purdue University, Faraday Institution, Royal Academy of Engineering, University College London, European Commission, Horizon 2020 Framework Programme, Engineering and Physical Sciences Research Council, Division of Materials Research

OpenAlex ID: W4404719231