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Nano-structured 7YSZ electrolyte layer for solid oxide fuel cell prepared by plasma spray-physical vapor deposition
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National Key Research Program (2017YFB0306100), Guangdong Academy of Sciences Program (No. 2017GDASCX-0202, 2018GDASCX-0402, 2018GDASCX-0111), Guangdong Technical Research Program (No. 2017B090916002, 2017A070701027) Guangdong Natural Science Foundation (No. 2016A030312015, 2017A030310315), and Guangzhou Technical Research Program (No. 201605131008557, 201707010385).

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    Abstract:

    Due to high thermal stability and purely oxide ionic conductivity, yttria-stabilized zirconia (YSZ) is the most commonly used electrolyte material for solid oxide fuel cell (SOFC). Standard electrolyte preparation techniques for planar SOFC comprise wet ceramic techniques like tape-casting or screen printing, requiring sintering steps at temperatures above 1300 ℃. Plasma spray-physical vapor deposition (PS-PVD) as a novel technique can provide a more rapid and cost efficient method to produce nano-structured electrolyte layer without sintering. High-temperature sintering requires long processing time and can lead to oxidation of metal alloys used as mechanical supports, or to detrimental inter-reactions between the electrolyte and adjacent electrode layers. Besides, the PS-PVD is different from traditional technique atmospheric plasma spray (APS) for various deposition mechanisms. Through this novel method, dense thin 7YSZ electrolyte layers with nano-structure are fabricated based on vapor deposition in PS-PVD processing. The 7YSZ electrolyte layer with a thickness of 8.7~12.3 μm was prepared, and its gas permeability can achieve 2.24~2.29 10-8 cm4gf-1s-1.

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[Xu Wei. Nano-structured 7YSZ electrolyte layer for solid oxide fuel cell prepared by plasma spray-physical vapor deposition[J]. Rare Metal Materials and Engineering,2019,48(12):3835~3840.]
DOI:10.12442/j. issn.1002-185X.20180666

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History
  • Received:June 25,2018
  • Revised:July 10,2018
  • Adopted:July 27,2018
  • Online: January 07,2020
  • Published: