SiO2-B2O3-BaO-WO3 glasses with varying Al2O3 content as a sealing material for reversible solid oxide fuel cells

被引：20

作者：

Lee, Hansol ^{[1
,2
]}

Kim, U. Sik ^{[1
,2
]}

Kim, Sun Dong ^{[3
]}

Woo, Sang Kuk ^{[3
]}

Chung, Woon Jin ^{[1
,2
]}

机构：

[1] Kongju Natl Univ, Inst Rare Met, 1223-24 Cheonan Daero, Cheonan 31080, Chungnam, South Korea

[2] Kongju Natl Univ, Div Adv Mat Engn, 1223-24 Cheonan Daero, Cheonan 31080, Chungnam, South Korea

[3] Korea Inst Energy Res, Energy Mat Lab, 140,Yuseong Daero 131 2beon Gil, Daejeon 28125, South Korea

来源：

CERAMICS INTERNATIONAL | 2020年 / 46卷 / 11期

基金：

新加坡国家研究基金会;

关键词：

Glass; Silicates; Sealing; Fuel cell; Thermal properties; INTERCONNECTS; PERFORMANCE; SEALANT; ALKALI;

D O I：

10.1016/j.ceramint.2020.04.148

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Silicate glasses based on SiO2-B2O3-BaO-WO3 (SBBW) are synthesized with varying added Al2O3 content, and their thermal and structural properties are examined as a sealing material for reversible solid oxide fuel cells (RSOCs). When up to 17.5 mol%, Al2O3 is added, glass stability is improved at the expense of viscosity at sealing temperature. The glass transition temperature (T-g), coefficient of thermal expansion (CTE) and flow at sealing temperature are investigated while varying Al2O3 content, to find the proper composition for RSOC sealing. The structural changes in the glasses resulting from the Al2O3 are inspected using Raman spectroscopy and an X-ray diffractometer. The adhesion characteristics of the glasses are examined by applying the glasses between NiO-yittria stabilized zirconia (NiO-YSZ) and Crofer22APU. A RSOC stack with 15 cells is prepared with glass containing 10 mol% of Al2O3 as a sealing material, and the practical feasibility of the glass is successfully demonstrated. The open circuit voltage is monitored while cycling the RSOC stack between water electrolysis mode and fuel cell mode.

引用

页码：18256 / 18261

页数：6

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