Effect of YSZ addition on the performance of glass-ceramic seals for intermediate temperature solid oxide fuel cell application

Wang, Xiaochun; Li, Ruizhu; Yang, Jiajun; Gu, Dawei; Yan, Dong; Pu, Jian; Chi, Bo; Li, Jian

doi:10.1016/j.ijhydene.2018.03.023

Cited by 21 publications

(8 citation statements)

References 22 publications

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“…In conventional compressed mica seals, it is identified that the main leak path is at the interface between the mica and the bonding material. This observation encourages to increase of the mica seal by adding surface glass interlayers [13] observed that the leakage rate is reduced by hundreds.…”

Section: Composite Sealantmentioning

confidence: 67%

“…As for some properties that need attention including i. Thermal Properties, a special benefit in the formation of glass-ceramics is that products show almost zero shrinkage that could be made [12,13]. ii.…”

Section: Sealant Ceramic Propertiesmentioning

confidence: 99%

“…As a result, Tg data are available for various glass compositions. The coefficient of thermal expansion must be appropriate with other cell components, such as Yttria-stabilized (YSZ) electrolytes and interconnect material, to reduce thermal pressure [12,13].…”

Section: Rigid Bonded Sealantmentioning

confidence: 99%

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Progress in Glass-Ceramic Seal for Solid Oxide Fuel Cell Technology

Gunawan

Sulistyo

Setyawan³

2021

ARFMTS

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Solid oxide fuel cells (SOFCs) have emerged as promising energy conversion devices nowadays. SOFC consists of several components such as cathode, anode, electrolyte, interconnects, and sealing materials. In planar SOFC stack construction, the sealant and interconnection functions play an important role. Glass and ceramics are quite popularly used as SOFC sealing materials to achieve several functions including preventing leakage of fuel and oxidants in the stack and electrically isolating cells in the stack. In this review, material preparation, material composition, ceramic properties especially thermal properties are compared from various systems that have been developed previously. The main challenges and complexities in the functional part of SOFC sealants include: (i) chemical incompatibility and instability in the oxidizing and reducing environment by adjusting the value of the thermal expansion coefficient (CTE) with the interconnecting material during SOFC operation, and (ii) insulation of oxidizing fuels and gases by matching CTE anode and cathode. Also, the sealant glass transition determines the maximum permissible working temperature of the SOFC. The choice of method and analysis will provide data on various ceramic attributes. The search for thermal attributes consisting of Glass transition (Tg), Deformation temp (Td), Crystallization temp (Tx), Melting pt (Tm) became a focus on SOFC sealant development.

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Section: Composite Sealantmentioning

confidence: 67%

Section: Sealant Ceramic Propertiesmentioning

confidence: 99%

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Progress in Glass-Ceramic Seal for Solid Oxide Fuel Cell Technology

Gunawan

Sulistyo

Setyawan³

2021

ARFMTS

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“…The surface roughness of the oxide scale formed on the metallic alloy played a critical role in determining mutual wettability between seals and interconnect [13,29]. Comparing the testing results for the H-2 and the H-3 glass, the pre-oxidized alloy specimens held at 750°C for 50 h showed lower equilibrium contact angles, for which there are two principal reasons: (ⅰ) Suitable cavities forming in the oxide scale enhanced glass wettability, promoting glass infiltration of the oxide scale 33 ; (ⅱ) The similarity of the sealing glass and oxide lead to the high degree of electronic continuity across the glass substrate interface, which could be expected to wet the oxide scale on the alloy surface.…”

Section: Methodsmentioning

confidence: 99%

“…Pyrolysis of polycarbosilane polyme by Key et al 43 operating temperature range (600-850°C), and redox stability. 9,10 Among sealing materials, glass and glass-ceramics are suitable candidates whose composition can be adjusted to obtain desired physical properties, 11,12 Although they show extremely low gas leakage rates in SOFC, 13 resistance to shear stress is gradually lowered because of thermal and chemical reactions during stack cycling, resulting in electrochemical performance degradation. [14][15][16] On the one hand, alkalis in the glass reacted with Cr-containing alloys on the airside over the long term, forming volatile chromates (BaCrO 4 , K 2 CrO 4 , Na 2 CrO 4 , or Sr 2 CrO 4 ), 17,18 greatly decreasing joint integrity between glass seals and interconnect.…”

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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