Effect of thermophysical properties of perovskite electrolytes on intermediate temperature SOFC

IF 5 2区工程技术 Q1 ENGINEERING, MECHANICAL

International Journal of Heat and Mass Transfer Pub Date : 2025-03-18 DOI:10.1016/j.ijheatmasstransfer.2025.126944

Baitong Wang, Mingshang Liu, Zide Wu, Xun Liu, Mu Li, Dawei Tang

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引用次数: 0

Abstract

Solid oxide fuel cell (SOFC) has captured significant interest and the electrolyte material is the key during operating. The present work introduces a series of intermediate temperature perovskite materials regarding of synthesis and characterization method. Corresponding thermophysical properties including thermal diffusivity, specific heat and thermal conductivity were determined at relevant temperature range. The result shows that thermal diffusivity has a stable tendency for the intermediate temperature electrolytes materials; Ba₃NbMoO_8.5 has the highest specific heat and BaSc_0.8MoNb_0.2O_2.8 has the highest thermal conductivity at 873 K. Besides, a 3-D model is established including transient state and steady state. After combining intermediate temperature electrolyte materials with different thermophysical properties, it is found that the maximum temperature gradient and thermal shock exist at switching time (t = 600 s) and the tendency are controversial for each other. Besides, after comparing different supported structure of SOFC, a systematic selection strategy is provided for IT-SOFC application. Cathode-supported structure SOFC is an ideal choice for long term usage, which has a low temperature gradient; whereas electrolyte-supported structure with Na_0.5Bi_0.5TiO₃ electrolyte is beneficial to quick start-up system, which has the lowest thermal shock.

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来源期刊

International Journal of Heat and Mass Transfer 工程技术-工程：机械

CiteScore

10.30

自引率

13.50%

发文量

1319

审稿时长

41 days

期刊介绍： International Journal of Heat and Mass Transfer is the vehicle for the exchange of basic ideas in heat and mass transfer between research workers and engineers throughout the world. It focuses on both analytical and experimental research, with an emphasis on contributions which increase the basic understanding of transfer processes and their application to engineering problems. Topics include: -New methods of measuring and/or correlating transport-property data -Energy engineering -Environmental applications of heat and/or mass transfer