Simulation and analysis of sintering stress and warpage displacement in anode supported planar solid oxide fuel cells. (15th July 2022)

• Record Type: Journal Article
• Authors: Lan, Ziliang; Cui, Daan; Cheng, Mojie; Ji, Yulong; Wu, Bohao; Meng, Tao; Tu, Baofeng
• Is Part Of: International journal of hydrogen energy. Volume 47:Number 60(2022)
• Page Start: 25378
• Page End: 25390
• Publication Date: 2022-07-15
• Subjects: Solid oxide fuel cell -- Planar -- Thermal stress -- Displacement -- Sintering process; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2022.05.290
• Languages: English
• ISSNs: 0360-3199

Abstract

Abstract: During the sintering process of solid oxide fuel cells (SOFCs), the mismatch in the thermophysical properties of materials can lead to excessive local thermal stress and warpage. By establishing a 3D multiphysics model, the stress distribution and displacement during sintering are studied. The results show that when the anode and electrolyte thicknesses are 0.2 mm and 0.02 mm, respectively, the maximum sintering stress is 38.8 MPa, which is 48% lower than the maximum value of all simulation results. In this study, when the anode thickness is 0.7 mm and the electrolyte thickness is 0.008 mm, the maximum warpage displacement is the smallest at 0.14 mm. A sintering preparation method for partially coated cells is proposed. These results can be used to optimize the sintering process of SOFCs and greatly reduce the sintering stress and warpage of SOFCs. Highlights: A SOFC sintering model is established to predict sintering stress and deformation. Effects of anode thickness on the sintering stress and displacement are investigated. Effects of difference of thermal expansion coefficients on sintering stress is studied. A sintering method of SOFC anode partially coated is proposed to reduce the stress.