采用新型陷阱设计互连增强传质的固体氧化物燃料电池热-电-机械行为的数值研究

IF 2.6 4区 化学 Q3 ELECTROCHEMISTRY
Aimen Abdellah Bouaiss, Mohamed Souri Mimoune, Djafar Chabane, Nadhir Lebaal, Oussama Bouaiss, Lotfi Alloui
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引用次数: 0

摘要

近年来,固体氧化物燃料电池(SOFC)的研究重点是通过解决已报道的问题和改进基本机制来优化性能。本文为通过设计陷阱的互连来提高SOFC性能打开了大门,旨在提高传质和电化学转换效率。本文进行了数值研究,分析了陷阱的数量和三维尺寸(长度、宽度和高度)对SOFC行为的影响。结果表明,该捕集器设计有效地解决了广泛报道的下肋区域反应物分布差的问题。此外,增加陷阱的大小可以提高SOFC的性能,陷阱的长度被认为是提高SOFC性能的主要因素。然而,圈闭宽度的变化在其影响上表现出不一致。因此,这些参数经过仔细优化,以获得最佳性能。三阱设计的最佳配置确定为长12mm,宽0.3 mm,高1mm,与传统设计相比,输出功率增加14%。热机械分析也进行了,揭示了电性能是一个妥协与电池的机械稳定性。具体来说,观察到圈闭角周围的热应力增加,导致电解质失效概率显著上升。根据这些发现,作者建议将支撑层或进一步优化陷阱形状与机械应力作为研究约束,以提高SOFC的耐久性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Numerical investigation of thermo-electro-mechanical behavior in solid oxide fuel cells with novel traps design interconnects for enhanced mass transfer

Recent efforts in solid oxide fuel cell (SOFC) research have prioritized performance optimization by addressing reported issues and improving fundamental mechanisms. This paper opens the doors to the enhancement of SOFC performance through traps-designed interconnects, aimed at enhancing mass transfer and electrochemical conversion efficiency. A numerical investigation is conducted to analyze the effects of traps, including their number and three-dimensional size (length, width, and height), on SOFC behavior. Results show that the traps design effectively addresses the widely reported issue of poor reactants’ distribution in the under-rib areas. Additionally, increasing traps’ size enhances SOFC performance, with traps length identified as the primary contributor to improvement. However, variations in traps width exhibited inconsistencies in its impact. As a result, these parameters were carefully optimized for the optimal performance. The optimal configuration for a three-traps design is determined to be 12 mm in length, 0.3 mm in width, and 1 mm in height, resulting in a 14% increase in power output compared to conventional design. A thermo-mechanical analysis is also conducted, revealing that the electrical performance comes as a compromise with the mechanical stability of the cell. Specifically, an increase in thermal stresses around traps corners is observed, resulting in a significant rise in the probability of electrolyte failure probability. The authors suggest incorporating support layers or further optimizing trap shapes with mechanical stresses as a study constraint to enhance SOFC durability in response to these findings.

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来源期刊
CiteScore
4.80
自引率
4.00%
发文量
227
审稿时长
4.1 months
期刊介绍: The Journal of Solid State Electrochemistry is devoted to all aspects of solid-state chemistry and solid-state physics in electrochemistry. The Journal of Solid State Electrochemistry publishes papers on all aspects of electrochemistry of solid compounds, including experimental and theoretical, basic and applied work. It equally publishes papers on the thermodynamics and kinetics of electrochemical reactions if at least one actively participating phase is solid. Also of interest are articles on the transport of ions and electrons in solids whenever these processes are relevant to electrochemical reactions and on the use of solid-state electrochemical reactions in the analysis of solids and their surfaces. The journal covers solid-state electrochemistry and focusses on the following fields: mechanisms of solid-state electrochemical reactions, semiconductor electrochemistry, electrochemical batteries, accumulators and fuel cells, electrochemical mineral leaching, galvanic metal plating, electrochemical potential memory devices, solid-state electrochemical sensors, ion and electron transport in solid materials and polymers, electrocatalysis, photoelectrochemistry, corrosion of solid materials, solid-state electroanalysis, electrochemical machining of materials, electrochromism and electrochromic devices, new electrochemical solid-state synthesis. The Journal of Solid State Electrochemistry makes the professional in research and industry aware of this swift progress and its importance for future developments and success in the above-mentioned fields.
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