Deposition of a Thin-Film CGO Electrolyte for Solid Oxide Fuel Cells

Andrey A. Solovyev; Anastasya N. Kovalchuk; Igor V. Ionov; S.V. Rabotkin; Anna V. Shipilova; Dmitry N. Terentev

doi:10.4028/www.scientific.net/KEM.685.776

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HomeKey Engineering MaterialsKey Engineering Materials Vol. 685Deposition of a Thin-Film CGO Electrolyte for...

Deposition of a Thin-Film CGO Electrolyte for Solid Oxide Fuel Cells

Abstract:

Reducing the operating temperature of solid oxide fuel cells (SOFCs) from 800-1000°C is one of the main SOFC research goals. It can be achieved by lowering the thickness of an electrolyte (ZrO₂:Y₂O₃ (YSZ) is widely used as electrolyte material). On the other hand the problem can be solved by using of another electrolyte material with high ionic conductivity at intermediate temperatures. Therefore the present study deals with magnetron sputtering of ceria gadolinium oxide (CGO), which has a higher conductivity compared to YSZ. The microstructure of CGO layers deposited on porous NiO/YSZ substrates by reactive magnetron sputtering of Ce:Gd cathode is investigated. Current voltage characteristics (CVC) of a fuel cell with NiO/YSZ anode, CGO electrolyte and LSCF/CGO cathode were obtained. It was shown that the power density of a fuel cell with CGO electrolyte weakly depends on the operating temperature in the range of 650-750°C in contradistinction to YSZ electrolyte, and is about 600-650 mW/cm².

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Key Engineering Materials (Volume 685)

Pages:

776-780

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.685.776

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Online since:

February 2016

Authors:

Andrey A. Solovyev, Anastasya N. Kovalchuk, Igor V. Ionov, S.V. Rabotkin, Anna V. Shipilova, Dmitry N. Terentev

Keywords:

CGO Electrolyte, Magnetron Sputtering, NiO/YSZ Anode, Solid Oxide Fuel Cells

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