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

Guo, Maolin; Yang, Zhibin; Liu, Jinmei; Jin, Yiqian; Wu, Xu; Chen, Fanglin

doi:10.1016/j.ceramint.2021.02.046

Cited by 17 publications

(3 citation statements)

References 26 publications

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“…[1][2][3] Given that the open-circuit voltage provided by a single cell is low, the cells must be connected by an interconnect to obtain a sufficiently high operating voltage. 4,5 However, the thermal expansion mismatch between SOFC materials will trigger the development of thermal stresses during thermal cycling, posing a poten-tial hazard for safe service. Crofer22APU/Crofer22H stainless steel with a coefficient of thermal expansion matching the SOFC components is widely used in support frames and interconnects to alleviate this problem.…”

Section: Introductionmentioning

confidence: 99%

“…Planar solid oxide fuel cell (SOFC), with a series of advantages such as high‐energy conversion efficiency, good fuel flexibility, and low pollution, makes it a prospective energy conversion device 1–3 . Given that the open‐circuit voltage provided by a single cell is low, the cells must be connected by an interconnect to obtain a sufficiently high operating voltage 4,5 . However, the thermal expansion mismatch between SOFC materials will trigger the development of thermal stresses during thermal cycling, posing a potential hazard for safe service.…”

Section: Introductionmentioning

confidence: 99%

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Reactive air brazing of 3YSZ ceramic to aluminized Crofer22H stainless steel using Ag–CuO fillers

Zhou

Yang

et al. 2022

Int J Applied Ceramic Tech

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In this work, an effective protected Al2O3 layer was fabricated first on the surface of Crofer22H by reactive air aluminization to suppress cathodic poisoning in solid oxide fuel cells. Then, the reactive air brazing of aluminized Crofer22H to 3YSZ ceramics was carried out by using Ag–CuO fillers. The effects of CuO content and brazing temperature on the interfacial microstructure and mechanical properties of the joints were studied in detail. The results indicated that maintaining a continuous Al2O3 layer was the prerequisite for achieving a reliable joint. And the interfacial reaction gradually became intense with the increase of CuO content, and the continuity of the Al2O3 layer was disrupted as it was increased to 6 mol%. The well‐connected joints could be achieved when brazing at 970–1100°C with Ag–2CuO filler. The interfacial microstructure did not obviously change with increasing temperature, and the joint strength was stable at ∼35 MPa. While the interfacial reaction gradually weakened with increasing temperature as brazing with Ag–4CuO filler, the well‐connected joints were obtained when brazing above 1000°C, and the maximum shear strength of ∼44.3 MPa was obtained when brazing at 1050°C for 30 min.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Reactive air brazing of 3YSZ ceramic to aluminized Crofer22H stainless steel using Ag–CuO fillers

Zhou

Yang

et al. 2022

Int J Applied Ceramic Tech

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“…The metallic interconnect and ceramic/ glass material are needed for a stack for structure support and hermiticity. 5 The anode and cathode material are mixed ionic and electronic conducting phases, increasing the complexity of the electrode. The different phases dominate gas, electron, and ion transport processes.…”

mentioning

confidence: 99%

Analysing Tortuosity for Solid Oxide Fuel Cell Anode Material: Experiments and Modeling

Zhang,

Yang,

et al. 2023

J. Electrochem. Soc.

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Solid oxide fuel cells (SOFCs) directly convert chemical energy to electricity with high electrical efficiency. It involves gas transport through the porous electrode to the three-phase boundaries (TPB). The tortuosity of gas transport relates the bulk diffusion of gas in free space to the effective diffusion coefficient of gas migrating through a porous material. Therefore, determining the tortuosity is of great importance. This paper tests button SOFCs with NiO-YSZ as anode material followed by dual beam-focused ion beam scanning electron microscopy (FIB-SEM) to obtain 2D serial slice images. Based on processed 2D images and reconstructed 3D microstructure, the tortuosity is calculated using three approaches i.e., porosity-tortuosity correlations, voxel-based, and path-length-based approaches. The test results show that a decrease in Ni content in the anode greatly decreases the cell performance due to a decreased percolated electronic phase. The sample with low performance has high tortuosity. Different approaches vary regarding the tortuosity value and computational time. The path-length-based approach can achieve reasonable accuracy in a relatively short time but is only valid for using the longest path length.

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Ceramics for solid oxide fuel cells

Marimuthu¹,

Grace²

2023

Advanced Ceramics for Energy Storage, Thermoelectrics and Photonics

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

Cited by 17 publications

References 26 publications

Reactive air brazing of 3YSZ ceramic to aluminized Crofer22H stainless steel using Ag–CuO fillers

Reactive air brazing of 3YSZ ceramic to aluminized Crofer22H stainless steel using Ag–CuO fillers

Analysing Tortuosity for Solid Oxide Fuel Cell Anode Material: Experiments and Modeling

Ceramics for solid oxide fuel cells

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