Abstract
We demonstrate that the highly active but unstable nanostructured intermediate-temperature solid oxide fuel cell cathode, La0.6Sr0.4CoO3-δ (LSCo), can retain its high oxygen reduction reaction (ORR) activity with exceptional stability for 4000 h at 700 C by overcoating its surfaces with a conformal layer of nanoscale ZrO2 films through atomic layer deposition (ALD). The benefits from the presence of the nanoscale ALD-ZrO2 overcoats are remarkable: a factor of 19 and 18 reduction in polarization area-specific resistance and degradation rate over the pristine sample, respectively. The unique multifunctionality of the ALD-derived nanoscaled ZrO2 overcoats, that is, possessing porosity for O2 access to LSCo, conducting both electrons and oxide-ions, confining thermal growth of LSCo nanoparticles, and suppressing surface Sr-segregation is deemed the key enabler for the observed stable and active nanostructured cathode. © 2013 American Chemical Society.
Recommended Citation
Y. Gong et al., "Stabilizing Nanostructured Solid Oxide Fuel Cell Cathode with Atomic Layer Deposition," Nano Letters, vol. 13, no. 9, pp. 4340 - 4345, American Chemical Society, Sep 2013.
The definitive version is available at https://doi.org/10.1021/nl402138w
Department(s)
Chemical and Biochemical Engineering
Keywords and Phrases
atomic layer deposition; cathode; degradation; Solid oxide fuel cell
International Standard Serial Number (ISSN)
1530-6992; 1530-6984
Document Type
Article - Journal
Document Version
Citation
File Type
text
Language(s)
English
Rights
© 2024 American Chemical Society, All rights reserved.
Publication Date
11 Sep 2013
PubMed ID
23924170
