Nanostructured Cathodes for Solid Oxide Fuel Cells by a Solution Spray-Coating Process

Zhang, Lei; Zhu, Liangzhu; Virkar, Anil V.

doi:10.1149/2.0541613jes

Nanostructured Cathodes for Solid Oxide Fuel Cells by a Solution Spray-Coating Process

Journal Article · Wed Sep 21 00:00:00 EDT 2016 · Journal of the Electrochemical Society

DOI:https://doi.org/10.1149/2.0541613jes· OSTI ID:1865182

Zhang, Lei ^[1]; Zhu, Liangzhu ^[2]; Virkar, Anil V. ^[2]

Univ. of Utah, Salt Lake City, UT (United States); University of Utah
Univ. of Utah, Salt Lake City, UT (United States)

Composite nano-cathodes containing Sr-doped LaMnO₃ (LSM) and Gd₂O₃-doped CeO₂ (GDC) were deposited on yttria-stabilized zirconia (YSZ) discs and YSZ/NiO + YSZ bi-layer discs using an aqueous solution. The samples were heated over a range of temperatures from 700°C to 1200°C to form LSM + GDC porous films. The crystallite size was estimated using X-ray diffraction (XRD) Scherrer formula. The crystallite size was in the ~3 nm to ~80 nm range. Polarization resistance was measured by electrochemical impedance spectroscopy (EIS) from 400°C to 700°C. Nano-cathodes of ~70 nm thickness fired at 700°C exhibited polarization resistance of ~0.23 Ωcm² at 700°C. By contrast, LSM + YSZ cathodes made by a conventional process exhibited polarization resistance of ~2 Ωcm². Fuel cell tests were conducted at 700°C on cells with nano-cathodes and conventional LSM + YSZ cathode. The maximum power density was ~0.51 Wcm^–2 with nano-cathodes. By contrast, the corresponding power density with conventional LSM + YSZ cathodes was ~0.11 Wcm^–2. Here, the present work shows that very thin cathode functional layers can be deposited on sintered YSZ/NiO + YSZ bi-layer discs by using an aqueous solution. This approach in principle could be extended to large area cells.

View Accepted Manuscript (DOE)

Research Organization:: Univ. of Utah, Salt Lake City, UT (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES); National Science Foundation

Grant/Contract Number:: FG02-03ER46086

OSTI ID:: 1865182

Journal Information:: Journal of the Electrochemical Society, Journal Name: Journal of the Electrochemical Society Journal Issue: 13 Vol. 163; ISSN 0013-4651

Publisher:: IOP PublishingCopyright Statement

Country of Publication:: United States

Language:: English

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Pore-graded and conductor- and binder-free FeS ₂ films deposited by spray pyrolysis for high-performance lithium-ion batteries Al Khateeb, Shadi; Sparks, Taylor D. Journal of Materials Research, Vol. 34, Issue 14 https://doi.org/10.1557/jmr.2019.208	journal	July 2019

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