Experimental validation of solid oxide fuel cell polarization modeling: An LSM-YSZ/YSZ/Ni-YSZ case study

Wang, Ruofan; Lu, Yanchen; Ma, Yenai; Sun, Zhihao; Gopalan, Srikanth; Basu, Soumendra N.; Pal, Uday B.

doi:10.1016/j.electacta.2020.137052

Cited by 9 publications

(11 citation statements)

References 44 publications

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“…As it can be observed in Figure 5a, the OCV is changing with the inlet gas flow rate. This behavior is explained by a slight leakage in the glass seal on the fuel side (29). As expected, this problem of gas tightness tends to be less visible at a high gas flow rates.…”

Section: Resultssupporting

confidence: 65%

A Dynamic Multi-Scale Model for Solid Oxide Cells Validated on Local Current Measurements: Impact of Global Cell Operation on the Electrodes Reaction Mechanisms

Silva¹,

Hubert²,

Morel³

et al. 2021

ECS Trans.

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A dynamic physically based model has been developed to unravel the relationships between the overall Solid Oxide Cells response and the reaction mechanisms taking place in the electrodes. This tool combines modules at three different length-scales: electrode microstructures, active functional layers, and single repeat unit. It allows computing the cell polarization together with the distribution of the local current densities, overpotentials, and gas composition. It has been shown that the synthetic electrode model reproduces accurately the real microstructure, which has been checked by comparison with 3D reconstructions. The microscale electrode models have been validated using polarization curves and impedance spectra measured in symmetrical cells. Finally, tests were conducted at different temperatures and inlet flow rates to validate the integrated multiscale approach. For this purpose, a special setup was developed to measure the local current densities in standard cells. A good agreement was found between the experimental and simulated data.

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Section: Resultssupporting

confidence: 65%

A Dynamic Multi-Scale Model for Solid Oxide Cells Validated on Local Current Measurements: Impact of Global Cell Operation on the Electrodes Reaction Mechanisms

Silva¹,

Hubert²,

Morel³

et al. 2021

ECS Trans.

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“…The open circuit voltage is reduced in practice because of many irreversibility actions that appear during the working of fuel cells, e.g., activation overpotential, ohmic overpotential, and concentration overpotential. In this way, the practically produced voltage (V) by SOFC can be calculated by the following equation [6,9,16,17]:…”

Section: Methodsmentioning

confidence: 99%

“…First, it is necessary to calculate a binary diffusivity for each gas pair and effective diffusivity for each gas pair gas in the medium. The binary diffusivity can be found by the Chapman-Engskog equation [17,25,26]:…”

Section: 𝑎 𝑏 𝑎𝑛𝑑 𝑐 Are Theoretical or Adjusted Coefficients [-];mentioning

confidence: 99%

Determination of Maximum Power to Be Produced by a Solid Oxide Fuel Cell

Andrade,

Huebner,

Matencio

et al. 2023

Preprint

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Solid oxide fuel cells can generate electrical energy more efficiently and reduce pollutant emissions. They can be applied in many practical engineering cases, such as stationary generation, aircraft, and hybrid fast charging stations. This work uses heuristic and deterministic optimization algorithms coupled with thermodynamics lumped models to determine the main operation variables to achieve maximum power. We found, as expected, that higher pressures improve the power output of one cell. For one cell operating near atmospheric pressure, the output power was 78.56 W; for an operating condition near 5 atm, the output power was 99.21 W. Moreover, the heuristic and deterministic algorithms obtained similar results. The proposed model can be improved with chemical kinetics and the inclusion of cell dimensions to become more precise but offers a base method to estimate the main operating variables of an SOFC.

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“…Так, зокрема, вміст Co, Mo, W у покриттях Co-Mo-WO x та Сo-W-ZrO 2 (табл. 1) з урахуванням асимптотичного характеру залежності ω М = f(і) дозволяє зробити висновок, що вона у першому наближенні може бути описана двопараметричним рівнянням, які зазвичай використовують для опису динаміки електрохімічних систем іншого характеру [13,14]:…”

Section: обговорення результатівunclassified

Modeling the Content of Components of Composite Electrolytic Cover From the Polarization Current

Nenastina¹,

Сахненко²,

Proskurina³

et al. 2022

Вісник НТУ "ХПІ"

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The composite coatings electrodeposition with the refractory metals and zirconium with cobalt makes it possible to obtain a coating with a unique combination of physicochemical properties that are unattainable when using other application methods. One of the reasons for the limited use of the electrolytic method of coating with such composites is the difficulty of controlling the process. The properties of alloys of the iron subgroup with refractory metals and composites depend not only on the chemical composition (the content of the refractory component) but also on the deposition conditions. Varying the polarization current density allows the creation of coatings of different compositions and, accordingly, different functional properties. The basis of the work was experimental research on the physicochemical patterns of electrolytic deposition of cobalt-based composite coatings by the galvanostatic current. The purpose of the work was to develop a mathematical model of the dependence of the cobalt-containing composite coatings formation on the polarization current density. The problem of describing the electrochemical deposition of metals, alloys and composite coatings is relevant since mathematical modeling is an integral part of the development of new and improvement of existing systems. A mathematical model is proposed to control the composition of composite electrolytic coatings based on cobalt, which allows obtaining coatings of a predetermined composition when varying the density of the operating current. It has been established that the composition of coatings, in particular the content of Co, Mo, W, can be controlled by varying the electrolysis current density, using quite simple developed mathematical models. The inclusion of Zr in the composition of composite coatings is described by a more complex model, in which the parameter values depend on both the concentration of the electrolyte components and the electrolysis conditions.

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Experimental validation of solid oxide fuel cell polarization modeling: An LSM-YSZ/YSZ/Ni-YSZ case study

Cited by 9 publications

References 44 publications

A Dynamic Multi-Scale Model for Solid Oxide Cells Validated on Local Current Measurements: Impact of Global Cell Operation on the Electrodes Reaction Mechanisms

A Dynamic Multi-Scale Model for Solid Oxide Cells Validated on Local Current Measurements: Impact of Global Cell Operation on the Electrodes Reaction Mechanisms

Determination of Maximum Power to Be Produced by a Solid Oxide Fuel Cell

Modeling the Content of Components of Composite Electrolytic Cover From the Polarization Current

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