Glass-Ceramic Sealants for SOEC: Thermal Characterization and Electrical Resistivity in Dual Atmosphere

Javed, Hassan; Sabato, Antonio Gianfranco; Mansourkiaei, Mohsen; Ferrero, Domenico; Santarelli, Massimo; Herbrig, Kai; Walter, Christian; Smeacetto, Federico

doi:10.3390/en13143682

Cited by 12 publications

(3 citation statements)

References 34 publications

(27 reference statements)

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“…A voltage of 1.6 V was applied between the upper and lower plates, which were connected to a voltage generator and a measuring circuit by platinum wires. Further details about the testing methodology and resistivity measurements can be found elsewhere [ 50 ].…”

Section: Methodsmentioning

confidence: 99%

Novel SrO-Containing Glass-Ceramic Sealants for Solid Oxide Electrolysis Cells (SOEC): Their Design and Characterization under Relevant Conditions

et al. 2022

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This study presents results on the development of strontium oxide (SrO) containing glass sealants used to join Crofer22APU to yttria-stabilized zirconia (3YSZ), in which the main glass components, that is, silicon oxide (SiO2), strontium oxide (SrO), calcium oxide (CaO) and aluminum oxide (Al2O3), have been varied appropriately. Certain properties, such as the crystallization behavior, the coefficient of thermal expansion, adhesion, and reactivity of the sealants in contact with Crofer22APU, have been reviewed and discussed. The optimized glass composition (with CTE in the 9.8–10.3 × 10−6 K−1 range) results in a good joining behavior by hindering the formation of undesirable strontium chromate (SrCrO4) on contact with the Crofer22APU steel after 1000 h. at 850 °C. High specific resistivity values of about 106 Ohm.cm have been obtained, thus demonstrating good insulating properties at 850 °C under an applied voltage of 1.6 V. A negligible degradation in the electrical resistivity trend was measured during the test up to 1000 h, thus excluding the presence of detrimental reactions of the glass-ceramic sealant in contact with Crofer22APU under a dual atmosphere, as confirmed using SEM-EDS post-mortem analyses.

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Section: Methodsmentioning

confidence: 99%

Novel SrO-Containing Glass-Ceramic Sealants for Solid Oxide Electrolysis Cells (SOEC): Their Design and Characterization under Relevant Conditions

et al. 2022

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“…However, these do not contain any references to investigations of glass sealants in combination with interconnectors under typical electrolysis conditions. Javed et al published results of a single BaO-containing glass ceramic sealant which was aged for 2000 h as a sandwich type sample sealing placed between two Crofer 22 APU-coupons in a dual atmosphere where the steam side containing 50 % of H2O with an applied voltage of 1.6 V (7). They found stable insulating characteristics with a resistivity of 1 M cm -1 of the glass sealant and the formation of interface scales with a thickness of less than 10 µm.…”

Section: Introductionmentioning

confidence: 99%

Stability of Glass Ceramic Sealants in Atmospheres with Increased Water Contents

Schilm¹,

Rost²,

Javed³

et al. 2023

ECS Trans.

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Operating solid oxide cells (SOC) in the fuel cell moder as well as in electrolyser mode increases the demands on the stability of glass-based sealants due to higher cell voltages and water contents in the steam atmospheres. Glasses in the system BaO-CaO-Al2O3-SiO2 with B2O3 and La2O3-additions form glass ceramics with extraordinary high CTE-values, suitable as sealants compatible with Crofer 22 APU interconnect in electrolyte supported stacks. The intrinsic properties of a set of glasses are characterized. Sandwich type sealing samples are exposed to a dual atmosphere at 850 °C with an electric voltage of 1,3 V applied across the sealants and a water content of 50 % in the steam atmosphere. In this out-of-stack environment, the resistance of the sealants is recorded. Their resistance over aging time indicates degradation phenomena like interface reactions. By SEM analysis, reactions between sealants and steel interconnect can be correlated with insulating characteristics.

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“…Nevertheless, the existing techniques for generating hydrogen still possess certain drawbacks, such as ecological contamination and the limited effectiveness of photovoltaic hydrogen production under elevated temperatures [5]. Hence, the solid oxide electrolysis cell (SOEC) has emerged as a secure, eco-friendly, and effective technique for generating hydrogen [6] while pursuing the objective of discovering an environmentally friendly and efficient method for hydrogen production. However, it is difficult to achieve its working process accurately, which involves electrochemical reactions, modeling, and control tasks [7,8].…”

Section: Introductionmentioning

confidence: 99%

Modeling of Nonlinear SOEC Parameter System Based on Data-Driven Method

Hou,

Ma,

et al. 2023

Atmosphere

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Based on the basic nonlinear parameter system of the solid oxide electrolysis cell, the data-driven method was used for system identification. The basic model of the solid oxide electrolysis cell was accomplished in Simulink and experiments were performed under a diversified input/output operating environment. The experimental results of the solid oxide electrolysis cell basic parameter system generated 15 datasets. The system identification process involved the utilization of these datasets with the application of nonlinear autoregressive-exogenous models. Initially, data identification came from the Matlab mechanism model. Then, the nonlinear autoregressive-exogenous structures were estimated and selected exploratively through an individual operating condition. In terms of fitness, we conclude that the solid oxide electrolysis cell parameter system cannot be satisfied by a solitary autoregressive-exogenous model for all datasets. Nevertheless, the nonlinear autoregressive-exogenous model utilized S-type nonlinearities to fit a total of 2 validation datasets and 15 estimated datasets. The obtained results were compared with the basic parameter system of a solid oxide electrolysis cell, and the nonlinear autoregressive-exogenous projected output demonstrated an accuracy of over 93% across diverse operational circumstances—regardless of whether there was noise interference. This result has positive significance for the future use of the solid oxide electrolysis cell to achieve the dual carbon goal in China.

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Glass-Ceramic Sealants for SOEC: Thermal Characterization and Electrical Resistivity in Dual Atmosphere

Cited by 12 publications

References 34 publications

Novel SrO-Containing Glass-Ceramic Sealants for Solid Oxide Electrolysis Cells (SOEC): Their Design and Characterization under Relevant Conditions

Novel SrO-Containing Glass-Ceramic Sealants for Solid Oxide Electrolysis Cells (SOEC): Their Design and Characterization under Relevant Conditions

Stability of Glass Ceramic Sealants in Atmospheres with Increased Water Contents

Modeling of Nonlinear SOEC Parameter System Based on Data-Driven Method

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