FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W4386853145> ?p ?o ?g. }

• W4386853145 endingPage "7" @default.
• W4386853145 startingPage "7" @default.
• W4386853145 abstract "Due to the asymmetric structure with multiple materials, SOFCs are subjected to various modes of mechanical stress, resulting in a risk of failure. Of particular importance are thermal and chemical strains, which depend on the micro- and macroscopic distribution of electrochemical reaction sites. Therefore, SOFC modeling must include electrochemistry, mass and charge transport, thermo-fluid dynamics, and structural analysis. In addition, appropriate experiments must be performed to validate the modeling results. This research group is working to develop a comprehensive environment for modeling and validation in order to evaluate the mechanical reliability of SOFCs. Electrochemical modeling of cathode was made based on the defect chemistry and mass transport of (La,Sr)CoO 3 (LSC) and (La,Sr)(Co,Fe)O 3 (LSCF). An empirical equation for the surface reaction of the porous electrode was determined by electrochemical analysis of a dense film electrode taking into account the difference between the dense film and porous electrodes [1]. Anode reaction rate on a unit length of triple phase boundary of Ni-YSZ-gas was determined using circular Ni model electrodes of various size [2]. Evaluation of 3D oxygen potential distribution inside the constituent oxides was made using an in-house code called SIMUDEL where mixed ionic/electronic conduction and oxygen nonstoichiometry were taken into consideration [3,4]. It was combined with commercial software to make structural analysis. Mechanical properties used for calculation were obtained from measurements by the resonance method and the small punch method or collected from the literature. Non-linear stress-strain behaviors were observed with Ni-YSZ cermet [5] and inelastic behaviors were found in most nonstoichiometric oxide materials. Large ferro-elasticity emerged in the LSC and LSCF [6] and in Sc stabilized ZrO2 electrolyte at elevated temperatures. Chemical strain in vacancy formation was formulated with a linear function of the defect concentration as an independent factor from the thermal expansion. In the structural analysis, it was treated as the additional temperature change of the local material. Volume change of Ni-YSZ cermet on red-ox operation was a difficult factor to formulate because of its complex dependence on composition, temperature, and atmosphere. As expected, Ni-YSZ showed expansion when oxidized, but under certain conditions at an intermediate temperature range, it rather contracted on oxidation [7]. In reality, the calculated stress distribution does not always match the actual behavior of the cell since there often are unconsidered factors. Thus, experimental validation is essential. For this purpose, we have developed methods for in-situ or operando measurements of cell shape and the residual stress. Long-focus laser profilometer was used to measure the warping of a planar cell during heating, operating, and cooling operations. For the change in the diameter of a tubular cell, the laser projection type dimension meter was employed. Residual stress measurements were made with a handy X-ray analyzer (μ-X360s, Pulstec Industrial. Co. Ltd.) combined with a newly developed one- or two-chamber cell holder [8,9]. Anode-supported cells from multiple sources were analyzed, showing different stress histories in red-ox operations depending on the microstructure of the anode support layer. Currently, we are developing a protocol for testing robustness of planar SOFCs. Here, temperature distribution is intentionally applied on a cell with segmented heater allays on the top and the bottom of the cell. Severe condition tests will be performed, and the results will be analyzed with the above-mentioned simulation. Acknowledgement This study was supported by the New Energy and Industrial Technology Development Organization (NEDO) . [1] T. Kawada, Current Opinion in Electrochemistry, 21, 274-282 (2020) DOI: 10.1016/j.coelec.2020.03.016 [2] M. Takeda, Master’s thesis, Graduate School of Environmental Studies, Tohoku University (2016) : M. Takeda, et al. Submitted to J. Electrochem. Soc. [3] K. Terada, et. al., ECS Trans. 35(2 part2), 923-933 DOI: 10.1149/1.3570073 [4] M. Sato, et. al., Trans. Jpn. Soc. Comp. Eng. Sci. 2017, 14 (2017) DOI: 10.11421/jsces.2017.20170004 [5] S. Watanabe et al., J. Mater. Sci. 55, 8679-8693 (2020) DOI: 10.1007/s10853-020-04624-4 [6] Y. Kimura et al., J. Electrochem. Soc. 161(11), F3079- F3083 (2014) DOI: 10.1149/2.0131411jes [7] Y. Morishita et al. , ECS Trans., 91(1) 1979-1984 (2019). DOI: 10.1149/09101.1979ecst [8] K. Yashiro et al., submitted to J. Power Sources [9] K. Oshima et al.,ECS Trans. 103(1), 1251-1260 (2021) DOI: 10.1149/10301.1251ecst" @default.
• W4386853145 created "2023-09-20" @default.
• W4386853145 creator A5009751941 @default.
• W4386853145 creator A5025451148 @default.
• W4386853145 creator A5031300451 @default.
• W4386853145 creator A5033938256 @default.
• W4386853145 creator A5039218697 @default.
• W4386853145 creator A5049229539 @default.
• W4386853145 creator A5049998841 @default.
• W4386853145 creator A5050600976 @default.
• W4386853145 creator A5053957314 @default.
• W4386853145 creator A5061728826 @default.
• W4386853145 creator A5072215809 @default.
• W4386853145 creator A5077861229 @default.
• W4386853145 creator A5083637129 @default.
• W4386853145 date "2023-08-28" @default.
• W4386853145 modified "2023-09-27" @default.
• W4386853145 title "(High-Temperature Energy, Materials, & Processes Division Subhash Singhal Award) From Electrochemical to Mechanical Modeling of SOFCs and Their Experimental Validation" @default.
• W4386853145 doi "https://doi.org/10.1149/ma2023-01547mtgabs" @default.
• W4386853145 hasPublicationYear "2023" @default.
• W4386853145 type Work @default.
• W4386853145 citedByCount "0" @default.
• W4386853145 crossrefType "journal-article" @default.
• W4386853145 hasAuthorship W4386853145A5009751941 @default.
• W4386853145 hasAuthorship W4386853145A5025451148 @default.
• W4386853145 hasAuthorship W4386853145A5031300451 @default.
• W4386853145 hasAuthorship W4386853145A5033938256 @default.
• W4386853145 hasAuthorship W4386853145A5039218697 @default.
• W4386853145 hasAuthorship W4386853145A5049229539 @default.
• W4386853145 hasAuthorship W4386853145A5049998841 @default.
• W4386853145 hasAuthorship W4386853145A5050600976 @default.
• W4386853145 hasAuthorship W4386853145A5053957314 @default.
• W4386853145 hasAuthorship W4386853145A5061728826 @default.
• W4386853145 hasAuthorship W4386853145A5072215809 @default.
• W4386853145 hasAuthorship W4386853145A5077861229 @default.
• W4386853145 hasAuthorship W4386853145A5083637129 @default.
• W4386853145 hasConcept C121332964 @default.
• W4386853145 hasConcept C144559425 @default.
• W4386853145 hasConcept C147789679 @default.
• W4386853145 hasConcept C153465999 @default.
• W4386853145 hasConcept C159985019 @default.
• W4386853145 hasConcept C17525397 @default.
• W4386853145 hasConcept C178790620 @default.
• W4386853145 hasConcept C185592680 @default.
• W4386853145 hasConcept C192562407 @default.
• W4386853145 hasConcept C2778456004 @default.
• W4386853145 hasConcept C2780597675 @default.
• W4386853145 hasConcept C2993864201 @default.
• W4386853145 hasConcept C49110097 @default.
• W4386853145 hasConcept C52859227 @default.
• W4386853145 hasConcept C540031477 @default.
• W4386853145 hasConcept C89395315 @default.
• W4386853145 hasConcept C97355855 @default.
• W4386853145 hasConceptScore W4386853145C121332964 @default.
• W4386853145 hasConceptScore W4386853145C144559425 @default.
• W4386853145 hasConceptScore W4386853145C147789679 @default.
• W4386853145 hasConceptScore W4386853145C153465999 @default.
• W4386853145 hasConceptScore W4386853145C159985019 @default.
• W4386853145 hasConceptScore W4386853145C17525397 @default.
• W4386853145 hasConceptScore W4386853145C178790620 @default.
• W4386853145 hasConceptScore W4386853145C185592680 @default.
• W4386853145 hasConceptScore W4386853145C192562407 @default.
• W4386853145 hasConceptScore W4386853145C2778456004 @default.
• W4386853145 hasConceptScore W4386853145C2780597675 @default.
• W4386853145 hasConceptScore W4386853145C2993864201 @default.
• W4386853145 hasConceptScore W4386853145C49110097 @default.
• W4386853145 hasConceptScore W4386853145C52859227 @default.
• W4386853145 hasConceptScore W4386853145C540031477 @default.
• W4386853145 hasConceptScore W4386853145C89395315 @default.
• W4386853145 hasConceptScore W4386853145C97355855 @default.
• W4386853145 hasIssue "54" @default.
• W4386853145 hasLocation W43868531451 @default.
• W4386853145 hasOpenAccess W4386853145 @default.
• W4386853145 hasPrimaryLocation W43868531451 @default.
• W4386853145 hasRelatedWork W1176754630 @default.
• W4386853145 hasRelatedWork W1976929250 @default.
• W4386853145 hasRelatedWork W2133146042 @default.
• W4386853145 hasRelatedWork W2178602371 @default.
• W4386853145 hasRelatedWork W2324442246 @default.
• W4386853145 hasRelatedWork W2373870511 @default.
• W4386853145 hasRelatedWork W2387133619 @default.
• W4386853145 hasRelatedWork W2517086061 @default.
• W4386853145 hasRelatedWork W2660537227 @default.
• W4386853145 hasRelatedWork W3203268080 @default.
• W4386853145 hasVolume "MA2023-01" @default.
• W4386853145 isParatext "false" @default.
• W4386853145 isRetracted "false" @default.
• W4386853145 workType "article" @default.