Multi-layer thin-film electrolytes for metal supported solid oxide fuel cells
Multi-layer thin-film electrolytes for metal supported solid oxide fuel cells
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DOI：
10.1016/j.jpowsour.2014.01.043
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发表时间：
2014-06-15
影响因子：
9.2
通讯作者：
Vassen, Robert
中科院分区：
文献类型：
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作者：
Haydn, Markus;Ortner, Kai;Vassen, Robert
开发金属支撑固体氧化物燃料电池（MSC）的关键是制造气密薄膜电解质，其将阴极与阳极分开。本文重点研究了以8 YSZ（8 mol.-%）为基础的电解质制备Y2 O3稳定的ZrO 2）。电解质层通过物理气相沉积（PVD）气流溅射（GFS）工艺施加。当连续的氧化物和金属薄膜多层沉积时，电解质的气密性显著提高，这中断了单层电解质的柱状晶粒结构。具有两层或八层氧化物/金属层且总厚度约为4 μ m的这种电解质在室温下获得小于3 × 10（-4）hPa dm（3）s（-1）cm（-2）（Δ p：100 hPa）的泄漏率，因此满足气密性要求。它们还对地下分级阳极上可能存在的表面缺陷和颗粒杂质具有高度耐受性。双层和多层电解质的MSC电池测试具有在850摄氏度下超过1.4 W cm（-2）的高功率密度，并强调了MSC电池的高潜力。(C)2014爱思唯尔有限公司版权所有。
A key to the development of metal-supported solid oxide fuel cells (MSCs) is the manufacturing of gastight thin-film electrolytes, which separate the cathode from the anode. This paper focuses the electrolyte manufacturing on the basis of 8YSZ (8 mol.-% Y2O3 stabilized ZrO2). The electrolyte layers are applied by a physical vapor deposition (PVD) gas flow sputtering (GFS) process. The gas-tightness of the electrolyte is significantly improved when sequential oxidic and metallic thin-film multi-layers are deposited, which interrupt the columnar grain structure of single-layer electrolytes. Such electrolytes with two or eight oxide/metal layers and a total thickness of about 4 mu m obtain leakage rates of less than 3 x 10(-4) hPa dm(3) s(-1) cm(-2) (Delta p: 100 hPa) at room temperature and therefore fulfill the gas tightness requirements. They are also highly tolerant with respect to surface flaws and particulate impurities which can be present on the graded anode underground. MSC cell tests with double-layer and multilayer electrolytes feature high power densities more than 1.4 W cm(-2) at 850 degrees C and underline the high potential of MSC cells. (C) 2014 Elsevier B.V. All rights reserved.