Xu Wei.等离子喷涂-物理气相沉积制备7YSZ纳米结构固体氧化物燃料电池电解质层[J].稀有金属材料与工程,2019,48(12):3835~3840.[.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.]
投稿时间:2018-06-25  修订日期:2018-07-10
中文关键词:  固体氧化物燃料电池  氧化钇稳定的氧化锆  物理气相沉积-等离子喷涂  电解质层
      氧化钇稳定的氧化锆(YSZ)因其高热稳定性和良好的氧离子电导率被广泛地作为电解质材料应用于固体氧化物燃料电池(SOFC)。常规的平面SOFC电解质制备技术,如带式流延或丝网印刷,需要在1300℃以上的温度下进行烧结,因此采用传统制备技术获得纳米结构电解质层是一个挑战。等离子喷涂-物理气相沉积(PS-PVD)作为一种新技术由于可以实现气相沉积可以提供快速、低成本的方法来制备纳米致密结构电解质层,可避免传统技术在长时间高温烧结引起的材料晶体结构变化以及相邻电极材料间的化学反应。PS-PVD技术具有与传统大气等离子喷涂(APS)完全不同的沉积机制。本研究采用该技术成功地制备了致密的纳米结构7YSZ薄电解质层。当电解质层厚度为8.7~12.3 μm时,其泄露率为2.24~2.29 10-8 cm4gf-1s-1.
Nano-structured 7YSZ electrolyte layer for solid oxide fuel cell prepared by plasma spray-physical vapor deposition
英文关键词:SOFC  YSZ  PS-PVD  Electrolyte layer
      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.
Xu Wei  
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