Synchrotron X-ray studies of model SOFC cathodes, part II: Porous powder cathodes
- Argonne National Lab. (ANL), Argonne, IL (United States). Materials Science Division
- Argonne National Lab. (ANL), Argonne, IL (United States). Chemical Sciences and Engineering Division
- Argonne National Lab. (ANL), Argonne, IL (United States). X-ray Science Division
- National Energy Technology Lab. (NETL), Morgantown, WV (United States); AECOM, Morgantown, WV (United States)
Infiltrated La0.6Sr0.4Co0.2Fe0.8O3-δ (LSCF) sintered porous powder cathodes for solid oxide fuel cells have been investigated by synchrotron ultra-small angle x-ray scattering (USAXS). Here, we demonstrated that atomic layer deposition (ALD) is the method for a uniform coating and liquid-phase infiltration for growing nanoscale particles on the porous LSCF surfaces. The MnO infiltrate, grown by ALD, forms a conformal layer with a uniform thickness throughout the pores evidenced by USAXS thickness fringes. The La0.6Sr0.4CoO3 (LSC) and La2Zr2O7 (LZO) infiltrates, grown by liquid-phase infiltration, were found to form nanoscale particles on the surfaces of LSCF particles resulting in increased surface areas. In conclusion, impedance measurements suggest that the catalytic property of LSC infiltrate, not the increased surface area of LZO, is important for increasing oxygen reduction activities.
- Research Organization:
- Argonne National Laboratory (ANL), Argonne, IL (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division; USDOE
- Grant/Contract Number:
- AC02-06CH11357
- OSTI ID:
- 1411042
- Alternate ID(s):
- OSTI ID: 1607587
- Journal Information:
- Solid State Ionics, Vol. 311, Issue C; ISSN 0167-2738
- Publisher:
- ElsevierCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Tailoring SOFC Electrode Microstructures for Improved Performance
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journal | June 2018 |
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