Computational analysis on the electrode geometric parameters for the reversible solid oxide cells

Lee, Seoung Ju; Jung, Chang Young; Yi, Sung Chul

doi:10.1016/j.electacta.2017.04.174

Cited by 7 publications

(8 citation statements)

References 42 publications

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“…One of the most powerful tools used to obtain the optimization of these parameters is the general algorithm (GA), using the fitness function calculation in an isothermal quasi‐two‐dimensional model 34 . Lee et al 35 generated a model‐based strategy to confirm the effects of geometric designs such as interconnector rib size and electrode backing layer thickness on overall fuel cell efficiency.…”

Section: Design Parameters and Their Effectsmentioning

confidence: 99%

Review of operating condition, design parameters and material properties for proton exchange membrane fuel cells

et al. 2020

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Summary Studies into the effects of parameters used in the design of proton exchange membrane (PEM) fuel cell have been done. All the modelling parameters considered influenced the performance of the PEM fuel cells. The effect of the operating condition is shown to be significant. Increasing the operating temperature and operating pressure increases the mobility of ions and as a result the ionic conductivity is increased. In addition, the membrane is dried out when the correct humidity is not provided which increases membrane degradation. Adopting good design parameter is necessary for the efficient transportation of both reactants (fuel and oxygen). With regards to the use of flow plates, the serpentine flow plate is highly recommended. Material properties are very important in material selection and new product development. For the membrane electrode area (MEA); the membrane, the ionic conductivity is very important and should be given an important consideration. This investigation thoroughly examined operating condition, design parameters and material properties necessary for PEM fuel cells experiment. The investigation will further accelerate the commercialization of fuel cells and its integration in the automotive industry.

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Section: Design Parameters and Their Effectsmentioning

confidence: 99%

Review of operating condition, design parameters and material properties for proton exchange membrane fuel cells

et al. 2020

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“…The model that describes a 2D single channel unit along the main flow direction is based on the rSOFC experiments in the references . The boundary conditions and operating parameters coincide with the experimental procedures in the references.…”

Section: Numerical Scheme and Model Validationmentioning

confidence: 99%

“…NASA developed a bielectrode‐supported rSOFC without a channel and interconnector, and thick Ni/Ag and LCC/LGC porous layers were applied to improve the reversible performance and decrease the weight and the high electrochemical voltage efficiencies . Similar studies were performed on other cell design schemes, including channel distribution and cell rib size; however, few studies considered reversible operation with syngas …”

Section: Introductionmentioning

confidence: 99%

CFD modeling and performance comparison of solid oxide fuel cell and electrolysis cell fueled with syngas

et al. 2018

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Summary Reversible solid oxide fuel cells (rSOFCs) may be applied to store and generate electrical energy in a reversible mode. This technique is promising to balance the conflict between intermittent power supply and demand in a sustainable way. One of the limitations of the development of rSOFCs is the high cost of storage and usage of pure H2, which may be solved by employing syngas as the fuel. The performance of rSOFCs depends on the development of bifunctional materials, cell design, and operation optimization, which are often investigated and predicted by the cost‐effective approach of mathematical modeling. However, the modeling of dual‐mode rSOFCs involving co‐redox reactions with syngas is not well developed. In this study, a two‐dimensional (2D) single‐channel model of an rSOFC is developed. The novelty of this model is that the multiphysics transport processes are fully coupled and solved with the reversible water‐gas shift reaction with syngas and the electrochemical reactions. The effects of the operating conditions and design parameters (eg, electrode thickness) are considered, with the aim of providing guidelines to optimize the design and operation of reversible cells. It is concluded that the thickness of the electrode has a larger impact on the water‐gas shift reaction than on the electrochemical reaction in both the gas diffusion and reaction regions. The C/H element ratio of syngas has a negative correlation with power output, but the distributions of current and gas species may be improved in both modes. A higher operating temperature improves the performance in both modes but has a more substantial effect in the electrolysis mode. The specific design and operating schemes favored in different modes should be balanced in the reversible mode.

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“…Renewable energy resources, including solar, wind, tidal, and biomass, are of great significance as the fossil energy crisis is becoming increasingly serious. However, their intermittence leads to an undesirable imbalance between demand and supply [1]. An energy storage device is required so that energy can be stored and released as needed.…”

Section: Introductionmentioning

confidence: 99%

“…Simulation is an efficient alternative to help the design of SOEC/SOFC to improve performance, especially when exploring a large combination of operating and structural parameters space. For example, Reference [1,[11][12][13] studied the influence of pressure on SOEC. Ni et al [14] researched electrode thickness, support type, electrode porosity and pore size and operating pressure on SOEC performance.…”

Section: Introductionmentioning

confidence: 99%

Optimization Design of Rib Width and Performance Analysis of Solid Oxide Electrolysis Cell

et al. 2020

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Structure design is of great value for the performance improvement of solid oxide electrolysis cells (SOECs) to diminish the gap between scientific research and industrial application. A comprehensive multi-physics coupled model is constructed to conduct parameter sensitivity analysis to reveal the primary and secondary factors on the SOEC performance and optimal rib width. It is found that the parameters of the O2 electrode have almost no influence on the optimal rib width at the H2 electrode side and vice versa. The optimized rib width is not sensitive to the electrode porosity, thickness, electrical conductivity and gas composition. The optimal rib width at the H2 electrode side is sensitive to the contact resistance at the interface between the electrode and interconnect rib, while the extremely small concentration loss at the O2 electrode leads to the insensitivity of optimal rib width to the parameters influencing the O2 diffusion. In addition to the contact resistance, the applied cell voltage and pitch width also has a dramatic influence on the optimal rib width of the fuel electrode. An analytical expression considering the influence of total cell polarization loss, the pitch width and the contact resistance is further developed for the benefit of the engineering society. The maximum error in the cell performance between the numerically obtained and analytically acquired optimal rib width is only 0.14% and the predictive power of the analytical formula is fully verified.

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Computational analysis on the electrode geometric parameters for the reversible solid oxide cells

Cited by 7 publications

References 42 publications

Review of operating condition, design parameters and material properties for proton exchange membrane fuel cells

Review of operating condition, design parameters and material properties for proton exchange membrane fuel cells

CFD modeling and performance comparison of solid oxide fuel cell and electrolysis cell fueled with syngas

Optimization Design of Rib Width and Performance Analysis of Solid Oxide Electrolysis Cell

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