Glass-ceramic sealant for solid oxide fuel cells application: Characterization and performance in dual atmosphere

Sabato, Antonio Gianfranco; Cempura, Grzegorz; Montinaro, Dario; Chrysanthou, A.; Salvo, Milena; Bernardo, Enrico; Secco, Michele; Smeacetto, Federico

doi:10.1016/j.jpowsour.2016.08.010

Cited by 58 publications

(45 citation statements)

References 33 publications

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“…Hence, the sealants for SOEC should be capable of working for >30 000 hours under the operating conditions of high pressure and applied thermal cycles . The sealants should also work effectively under oxidizing and reducing environment …”

Section: Introductionmentioning

confidence: 99%

“…To achieve long‐term stability, special attention needs to be paid when selecting the glass composition. Several glass compositions have been used and reported in literature for SOFCs and SOECs. Alkali and alkaline earth metallic oxides are commonly used as modifiers in glasses.…”

Section: Introductionmentioning

confidence: 99%

“…Most of the glass compositions available in literature have been mainly studied for the working temperature of 800°C . Few compositions have been studied up to the working temperature of 850°C .…”

Section: Introductionmentioning

confidence: 99%

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Design and characterization of novel glass‐ceramic sealants for solid oxide electrolysis cell (SOEC) applications

Javed

Sabato

Herbrig

et al. 2018

Int J Applied Ceramic Tech

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In this work, three new glass-ceramic compositions are designed and characterized as sealant materials for solid oxide electrolysis cells (SOEC), having operating temperature of 850°C. The crystallization and the sintering behavior of the glasses are investigated by using differential thermal analysis (DTA) and heating stage microscopy (HSM) respectively. The glasses show glass transition temperatures of 715-740°C, while the coefficients of thermal expansion (CTE) of 9.3-10.3 9 10 À6 K À1 (200-500°C) are measured for the glass-ceramics, matching with the CTEs of the other cell components. The compatibility between the glassceramic sealants, the 3YSZ electrolyte and the Crofer22APU interconnect is examined by means of SEM and EDS, in the as-joined condition and after 1000 hours at 850°C in air. Compositional changes in the glass-ceramic sealants are reviewed and discussed with respect to the formed crystalline phases before and after the aging treatment at 850°C. K E Y W O R D S crystals/crystallization, Interfaces, SOEC, thermal expansion ---

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Design and characterization of novel glass‐ceramic sealants for solid oxide electrolysis cell (SOEC) applications

Javed

Sabato

Herbrig

et al. 2018

Int J Applied Ceramic Tech

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“…When considering glass-ceramic material as the most promising sealant suitable for dual atmosphere operation[29], this restricts nonetheless the temperature to ca. 850°C at the maximum[30], which is lower than the minimal temperature to…”

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confidence: 82%

On the manufacturing of low temperature activated Sr0.9La0.1TiO3-δ-Ce1-xGdxO2-δ anodes for solid oxide fuel cell

Gondolini

Mercadelli

Constantin

et al. 2018

Journal of the European Ceramic Society

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Lanthanum doped strontium titanate-gadolinium doped cerium oxide (LST-GDC) anodic layers are sintered in air and further reduced in-situ at low temperature (750°C) avoiding usually performed pre-reduction treatment at high temperature. The influence of various milling techniques and of powders with different specific surface area, on the microstructures of screen-printed anodes, is investigated. The combination of milling and sonication processes is efficient in reducing aggregation of the anode powders. The anode performance is improved when a planetary milling step is involved in the preparation of the screen printing inks. The 2 use of gadolinium doped cerium oxide with high specific surface area decreases the polarization resistance. The rate of hydrogen oxidation is also enhanced by increasing porosity.

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“…In light of finding future clean energy technologies, solid oxide fuel cells (SOFCs) are recognized as one of the most environmentally friendly and feasible energy conversion devices [1,2]. It is due to their very long life expectancy [3], high efficiency [4], and fuel flexibility properties [5].…”

Section: Introductionmentioning

confidence: 99%

Natural Silica Sand/Alumina Ceramic Composites: Promising Candidates for Fuel-Cell Sealants

Hidayat

Istiqomah²,

Widianto

et al. 2017

IOP Conf. Ser.: Mater. Sci. Eng.

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Abstract. An attempt has been developed to establish the prospect of the useful application of Indonesian natural silica sand, instead of commercially expensive materials, as a future fuel-cell sealant. The sand was initially washed and ball-milled at 150 rpm for 60 minutes and then heated at 1000 C for the same duration. The resulting powder was then mixed with alumina powder at various amounts and shaped into discs before sintering at 1150 C and 1250 C to produce compact ceramics. The diameter shrinkage, porosity, and density of the ceramics were evaluated by Archimedes method. Their crystalline phase composition was quantified by Rietveld refinement analysis on the X-ray diffraction (XRD) data and the phase weight fraction was then used for coefficient of thermal expansion (CTE) evaluation. It was observed that the bulk density increased while the porosity decreased with alumina addition. The XRD data analysis revealed that the prepared silica sand contains a very high purity of quartz-SiO 2 , i.e. 97.8(18)%. The sintering temperatures of 1150 C and 1250 C transformed some quartz-SiO 2 to crystobaliteSiO 2 . All the calcite-CaCO 3 exhibited reaction sintering with SiO 2 forming wollastonite-CaSiO 3 . Therefore, the ceramic composites contained SiO 2 /Al 2 O 3 /CaSiO 3 . Regarding CTE, all of the composites meet the criteria for fuel-cell sealants, in the range of 9-12 ppm/C.Keywords: Indonesian silica sand, alumina, phase quantification, coefficient of thermal expansion, fuel-cell sealant. [5]. The SOFCs, devices that convert the chemical energy of fuels into electricity, have been extensively studied to reduce CO 2 emission and fossil fuel consumption [6]. In spite of this, it is confronted with a challengeable task on preventing leakage when an SOFC operates at high temperature (800-1000 °C) [7]. Consequently, a proper gas-tight sealing material plays a decisive role to obtain the best operation and performance of SOFCs [8]. The very basic criteria for fuel cell sealing material are the CTE, which must be in the range of 9-12 ppm/°C [9], and thermo-mechanically and chemically stable [10]. The matching of CTE of the fuel-cell sealing materials to other cell components is essential to minimize the thermal stresses [11].Recently, ceramic-based composites and glass-ceramics have become highly recommended sealing materials for various SOFCs attributable to their superior characteristics compared with those of metallic sealants, mainly to resist both reducing and oxidizing environments [12,13]. Additionally, they also perform excellent gas tightness and provide CTE similar to those of the other stack components [14]. Numerous investigations have been conducted in search of great fuel cell sealants, e.g. 30CaO- . However, rarely has a research exclusively explored the use of natural silica-based materials as the SiO 2 source for fuel cell sealants production.In this present study, we introduce the prospect of using Indonesian silica sand as the fuel cell sealing material. This breakthrough is crucial not on...

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Glass-ceramic sealant for solid oxide fuel cells application: Characterization and performance in dual atmosphere

Cited by 58 publications

References 33 publications

Design and characterization of novel glass‐ceramic sealants for solid oxide electrolysis cell (SOEC) applications

Design and characterization of novel glass‐ceramic sealants for solid oxide electrolysis cell (SOEC) applications

On the manufacturing of low temperature activated Sr0.9La0.1TiO3-δ-Ce1-xGdxO2-δ anodes for solid oxide fuel cell

Natural Silica Sand/Alumina Ceramic Composites: Promising Candidates for Fuel-Cell Sealants

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