Feldspar-based CaO–K2O–Na2O–BaO silicate glass sealant for solid oxide fuel cells

Guo, Mengyuan; Yang, Zhibin; Liu, Jinmei; Jin, Yiqian; Wu, Xu; Chen, Fanglin; Peng, Suping

doi:10.1016/j.ceramint.2021.02.046

Feldspar-based CaO–K₂O–Na₂O–BaO silicate glass sealant for solid oxide fuel cells

Journal Article · Fri Feb 05 23:00:00 EST 2021 · Ceramics International

DOI:https://doi.org/10.1016/j.ceramint.2021.02.046· OSTI ID:1779841

Guo, Mengyuan ^[1]; Yang, Zhibin ^[2]; Liu, Jinmei ^[2]; Jin, Yiqian ^[2]; Wu, Xu ^[2]; Chen, Fanglin ^[3]; Peng, Suping ^[2]

China Univ. of Mining & Technology, Beijing (China); University of South Carolina
China Univ. of Mining & Technology, Beijing (China)
Univ. of South Carolina, Columbia, SC (United States)

Sealants have been widely used in solid oxide fuel cells (SOFCs), and glass sealants have shown considerable potentials due to their low leakage rate. In this paper, we report a type of feldspar-based glass sealant, mainly composed of CaO-K₂O-Na₂O-BaO, with a coefficient of thermal expansion (CTE) of 10.11×10^-6k^-1, a glass transition temperature at 528°C, and a softening temperature at 573°C. Using this sealant to seal anode-supported SOFCs, the open-circuit voltage (OCV) remains at 1.08V after five thermal cycles and 50-hour aging at 750°C, close to the theoretical OCV value. The SEM and EDS reveal stable interface between the glass sealant and the anode, indicating excellent performance of the CaO-K₂O-Na₂O-BaO glass sealant for SOFC sealing applications.

View Accepted Manuscript (DOE)

Research Organization:: Univ. of South Carolina, Columbia, SC (United States)

Sponsoring Organization:: USDOE Office of Fossil Energy (FE); National Key R&D Program of China; National Natural Science Foundation of China (NNSFC)

Grant/Contract Number:: FE0031670

OSTI ID:: 1779841

Alternate ID(s):: OSTI ID: 1777599

Journal Information:: Ceramics International, Journal Name: Ceramics International Journal Issue: 10 Vol. 47; ISSN 0272-8842

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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25 ENERGY STORAGE
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Feldspar-based CaO–K2O–Na2O–BaO silicate glass sealant for solid oxide fuel cells

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Feldspar-based CaO–K₂O–Na₂O–BaO silicate glass sealant for solid oxide fuel cells