Effect of Nb(2)O(5) doping on improving the thermo-mechanical stability of sealing interfaces for solid oxide fuel cells

Nb(2)O(5) is added to a borosilicate sealing system to improve the thermo-mechanical stability of the sealing interface between the glass and Fe-Cr metallic interconnect (Crofer 22APU) in solid oxide fuel cells (SOFCs). The thermo-mechanical stability of the glass/metal interface is evaluated experi...

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Detalles Bibliográficos
Autores principales: Zhang, Qi, Du, Xinhang, Tan, Shengwei, Tang, Dian, Chen, Kongfa, Zhang, Teng
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2017
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5509747/
https://www.ncbi.nlm.nih.gov/pubmed/28706195
http://dx.doi.org/10.1038/s41598-017-05725-y
Descripción
Sumario:Nb(2)O(5) is added to a borosilicate sealing system to improve the thermo-mechanical stability of the sealing interface between the glass and Fe-Cr metallic interconnect (Crofer 22APU) in solid oxide fuel cells (SOFCs). The thermo-mechanical stability of the glass/metal interface is evaluated experimentally as well as by using a finite element analysis (FEA) method. The sealing glass doped with 4 mol.% Nb(2)O(5) shows the best thermo-mechanical stability, and the sealing couple of Crofer 22APU/glass/GDC (Gd(0.2)Ce(0.8)O(1.9)) remains intact after 50 thermal cycles. In addition, all sealing couples show good joining after being held at 750 °C for 1000 h. Moreover, the possible mechanism on the thermo-mechanical stability of sealing interface is investigated in terms of stress-based and energy-based perspectives.

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