Lovett, Adam J;
Wells, Matthew P;
Zhang, Yizhi;
Song, Jiawei;
Miller, Thomas S;
Wang, Haiyan;
MacManus-Driscoll, Judith L;
(2024)
Low Area Specific Resistance La-Doped Bi2O3 Nanocomposite Thin Film Cathodes for Solid Oxide Fuel Cell Applications.
Nano Letters
, 24
(49)
pp. 15575-15581.
10.1021/acs.nanolett.4c03679.
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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 LaxSr1-xCoyFe1-yO3 (LSCF) and La1-xSrxMnO3 (LSM) together with highly O2- 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.
| Type: | Article |
|---|---|
| Title: | Low Area Specific Resistance La-Doped Bi2O3 Nanocomposite Thin Film Cathodes for Solid Oxide Fuel Cell Applications |
| Location: | United States |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1021/acs.nanolett.4c03679 |
| Publisher version: | https://doi.org/10.1021/acs.nanolett.4c03679 |
| Language: | English |
| Additional information: | This publication is licensed under CC-BY 4.0 . |
| Keywords: | Energy materials, ion conductivity, nanocomposite, solid oxide fuel cell, epitaxial thin film, bismuth oxide |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Chemical Engineering |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10205768 |
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