Investigating the performance of Glass/Al2O3 composite seals in planar solid oxide fuel cells

Li, Ruizhu; Lian, Peng; Wang, Xiaochun; Yang, Jiajun; Yan, Dong; Pu, Jian; Chi, Bo; Li, Jian

doi:10.1016/j.compositesb.2020.107984

Cited by 24 publications

(6 citation statements)

References 31 publications

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“…[1][2][3] Compared to tubular stacks, planar stack configurations have attracted much attention due to their higher power density in terms of both volume and weight, enhancing compactness in SOFC stacks. [4][5][6] In planar SOFC, the cell and interconnect are joined by seals, identified as the critical component. 7,8 Ideal seals must meet multiple criteria, including but not limited to low leakage rates, high electrical insulation, excellent chemical compatibility over a wide A survey of the published literature modeling of CMCs has been studied by a n ers.…”

Section: Introductionmentioning

confidence: 99%

Effect of interconnect pre‐oxidation on high‐temperature wettability and mechanical properties of glass seals in SOFC

Tao

Wang

et al. 2021

J Am Ceram Soc.

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Metallic interconnect oxidation has a significant influence on shear strength between interconnect and sealing glass in SOFC stack operation. This is attributed to high-temperature mutual wettability. In this work, the glass having different crystallization kinetics was chosen to evaluate wettability and shear strength on Fe-16Cr alloy, which was heated treated at 750°C for 0, 50, and 100 h, forming oxide scale with a varying rough surface. Visual observation was used to quantify equilibrium contact angles between glass and substrates. The results illustrated that alloy oxidized for 50 h exhibited better wettability and shear strength, implying that thickness and roughness of the oxide scale are critical to enhancing interface joint strength. Long-term testing indicated that thermally stable glass possesses higher joint shear strength and more consistent properties. It was found that precipitated crystalline phases limited improvement of glass wettability, resulting in interfacial delamination of the glass/alloy layer over long-term operation.

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Section: Introductionmentioning

confidence: 99%

Effect of interconnect pre‐oxidation on high‐temperature wettability and mechanical properties of glass seals in SOFC

Tao

Wang

et al. 2021

J Am Ceram Soc.

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“…Fuel cells are electrochemical devices that convert chemical energy into electricity with low emissions [7]. Since fuel cells do not have the limitations of internal combustion engines (Carnot cycle), they can generate electricity with higher efficiency [8]. In addition, the progressive increase in utilising hydrogen as a clean energy carrier has caused a great interest in developing more efficient fuel cells as a prospective power source by both research and manufacturing communities.…”

Section: Introductionmentioning

confidence: 99%

Recent Advances and Challenges in Thin-Film Fabrication Techniques for Low-Temperature Solid Oxide Fuel Cells

2023

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Solid oxide fuel cells (SOFCs) are amongst the most widely used renewable alternative energy systems with near-zero carbon emission, high efficiency, and environment-friendly features. However, the high operating temperature of SOFCs is still considered a major challenge due to several issues regarding the materials’ corrosion, unwanted reactions between layers, etc. Thus, low-temperature SOFCs (LT-SOFCs) have gained significant interest during the past decades. Despite the numerous advantages of LT-SOFCs, material selection for each layer is of great importance as the common materials have not shown a desirable performance so far. In addition to the selection of the materials, fabrication techniques have a great influence on the properties of the SOFCs. As SOFCs with thinner layers showed lower polarisation resistance, especially in the electrolyte layer, different thin-film fabrication methods have been employed, and their effect on the overall performance of SOFCs has been evaluated. In this review, we aim to discuss the past and recent progress on the materials and thin-film fabrication techniques used in LT-SOFCs.

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“…Rigidly bond seals could form a tight junction between seals and adjacent components. So far, most sealing developments have focused on rigidly bond seals, which are mainly categorized into glass and glass-ceramic seals [ 14 , 15 , 16 , 17 , 18 , 19 ]. The glass could infiltrate into adjacent components and form strong bonding at the interface.…”

Section: Introductionmentioning

confidence: 99%

Investigation on Long-Term Stability of Vermiculite Seals for Reversible Solid Oxide Cell

et al. 2023

Molecules

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A reversible solid oxide cell (RSOC) integrating solid oxide fuel (SOFC) and a solid oxide electrolysis cell (SOEC) usually utilizes compressive seals. In this work, the vermiculite seals of various thickness and compressive load during thermal cycles and long-term operation were investigated. The leakage rates of seals were gradually increased with increasing thickness and input gas pressure. The thinner seals had good sealing performance. The compressive load was carried out at thinner seals, the possible holes were squeezed, and finally the leakage rates were lower. With a fixed input gas pressure of 1 psi, 2 psi, and 3 psi, the leakage rates of 0.50 mm vermiculite remained at around 0.009 sccm/cm, 0.017 sccm/cm and 0.028 sccm/cm during twenty thermal cycles, while the leakage rates remained at around 0.011 sccm/cm for about 240 h. Simultaneously, elemental diffusions between seals and components were limited, implying good compatibility. Furthermore, the open circuit voltage (OCV) remained at around 1.04 V during 17 thermal cycles, which is close to Nernst potentials. The stack performance confirmed that the vermiculite seals can meet the structural support and sealing requirements. Therefore, the vermiculite shows good promise for application in stacks during thermal cycles and long-term operation.

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Investigating the performance of Glass/Al2O3 composite seals in planar solid oxide fuel cells

Cited by 24 publications

References 31 publications

Effect of interconnect pre‐oxidation on high‐temperature wettability and mechanical properties of glass seals in SOFC

Effect of interconnect pre‐oxidation on high‐temperature wettability and mechanical properties of glass seals in SOFC

Recent Advances and Challenges in Thin-Film Fabrication Techniques for Low-Temperature Solid Oxide Fuel Cells

Investigation on Long-Term Stability of Vermiculite Seals for Reversible Solid Oxide Cell

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