A comprehensive study on effective triple-phase boundary density and its correlation with active anode thickness in solid oxide fuel cells

IF 3.5 3区 工程技术 Q3 ENERGY & FUELS Energy Science & Engineering Pub Date : 2024-07-25 DOI:10.1002/ese3.1850
Shingruf Shaukat, Asif Nadeem Tabish, Muneeb Irshad, Samina Akbar, Iqra Farhat, Liyuan Fan
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Abstract

Solid oxide fuel cells (SOFCs) are highly promising devices for efficient and low-emission energy conversion. The effective triple-phase boundary (TPB) density refers to the fraction of percolated TPB density that effectively contributes to the current production during cell operation. This is one of the most fundamental and least understood aspects of the cell design and performance assessment. This study methodically investigates the effective TPB density, using a computational fluid dynamics model based on the TPB-based kinetics and its correlation with the active anode thickness. Experimental data from previously published studies with varying thicknesses of anode functional layer and operating regimes are utilized to validate the model. The results of this study reaffirm that a significant fraction of the percolated TPB density in SOFCs remains unused during cell operation. This finding emphasizes the need to consider the effective TPB density for theoretical and experimental investigations focusing on optimizing cell performance. Furthermore, an inverse relationship is observed between the effective TPB density and the active anode thickness; a lower active anode thickness corresponds to a higher effective TPB density and vice versa. These findings contribute to advancing sustainable energy systems by guiding the development of more efficient SOFC designs and operational strategies that effectively utilize TPB sites.

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固体氧化物燃料电池中有效三相边界密度及其与活性阳极厚度相关性的综合研究
固体氧化物燃料电池(SOFC)是一种极具前景的高效、低排放能量转换设备。有效三相边界(TPB)密度指的是在电池运行过程中有效促进电流产生的渗流 TPB 密度。这是电池设计和性能评估中最基本、最不为人所知的一个方面。本研究采用基于 TPB 动力学的计算流体动力学模型及其与活性阳极厚度的相关性,有条不紊地研究了有效 TPB 密度。以前发表的研究中,阳极功能层厚度和工作状态各不相同,本研究利用这些实验数据对模型进行了验证。这项研究的结果再次证实,在 SOFC 中,相当一部分渗流 TPB 密度在电池运行期间仍未使用。这一发现强调了在进行以优化电池性能为重点的理论和实验研究时考虑有效 TPB 密度的必要性。此外,有效热塑性电池密度与活性阳极厚度之间存在反比关系;活性阳极厚度越低,有效热塑性电池密度越高,反之亦然。这些发现有助于指导开发更高效的 SOFC 设计和操作策略,从而有效利用热塑性硫化基点,从而推动可持续能源系统的发展。
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来源期刊
Energy Science & Engineering
Energy Science & Engineering Engineering-Safety, Risk, Reliability and Quality
CiteScore
6.80
自引率
7.90%
发文量
298
审稿时长
11 weeks
期刊介绍: Energy Science & Engineering is a peer reviewed, open access journal dedicated to fundamental and applied research on energy and supply and use. Published as a co-operative venture of Wiley and SCI (Society of Chemical Industry), the journal offers authors a fast route to publication and the ability to share their research with the widest possible audience of scientists, professionals and other interested people across the globe. Securing an affordable and low carbon energy supply is a critical challenge of the 21st century and the solutions will require collaboration between scientists and engineers worldwide. This new journal aims to facilitate collaboration and spark innovation in energy research and development. Due to the importance of this topic to society and economic development the journal will give priority to quality research papers that are accessible to a broad readership and discuss sustainable, state-of-the art approaches to shaping the future of energy. This multidisciplinary journal will appeal to all researchers and professionals working in any area of energy in academia, industry or government, including scientists, engineers, consultants, policy-makers, government officials, economists and corporate organisations.
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