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Keywords = yttria-doped ceria (YDC)

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9 pages, 3939 KiB  
Communication
Yttria-Doped Ceria Surface Modification Layer via Atomic Layer Deposition for Low-Temperature Solid Oxide Fuel Cells
by Hyeontaek Kim, Yongchan Park, Davin Jeong and Soonwook Hong
Coatings 2023, 13(3), 491; https://doi.org/10.3390/coatings13030491 - 23 Feb 2023
Cited by 6 | Viewed by 2427
Abstract
Atomic layer deposition (ALD) is performed to obtain less than 1 nm thick yttria-doped ceria (YDC) layers as cathode functional layers to increase the surface oxygen incorporation rate for low-temperature solid oxide fuel cells (LT-SOFCs). Introducing a YDC surface modification layer (SML) has [...] Read more.
Atomic layer deposition (ALD) is performed to obtain less than 1 nm thick yttria-doped ceria (YDC) layers as cathode functional layers to increase the surface oxygen incorporation rate for low-temperature solid oxide fuel cells (LT-SOFCs). Introducing a YDC surface modification layer (SML) has revealed that the optimized yttria concentration in YDC can catalyze surface oxygen exchange kinetics at the interface between the electrolyte and cathode. The YDC SML-containing fuel cell performs 1.5 times better than the pristine fuel cell; the result is an increased exchange current density at the modified surface. Moreover, a heavily doped YDC SML degrades the performance of LT-SOFCs, owing to the weakened oxygen surface kinetics due to the increased migration energy of the oxygen ions. Full article
(This article belongs to the Special Issue Surface Modification/Engineering for Electrochemical Applications)
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