Structural and Electrochemical Investigation of Anode-Supported Proton-Conducting Solid Oxide Fuel Cell Fabricated by the Freeze Casting Process

IF 2.6 4区 工程技术 Q3 ELECTROCHEMISTRY
Fuel Cells Pub Date : 2024-07-16 DOI:10.1002/fuce.202300200
Ali Karimi, Mohammad Hossein Paydar, Hamed Aghaei, Hossein Masoumi
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引用次数: 0

Abstract

Hierarchically oriented macroporous NiO–BaZr0.1Ce0.7Y0.2O3−δ (BZCY7) anode-supporting layer (ASL) was developed using the freeze casting technique. The resulting freeze-cast structure was analyzed through scanning electron microscopy and X-ray computed tomography. A thin layer of BZCY7 was utilized as a proton-conducting electrolyte, whereas La1.9Sr0.1Ni0.7Cu0.3O3−δ –gadolinium-doped ceria 10% Gd (LSNC–GDC10) was employed and evaluated as cathode layer. The performance of the cell was assessed by means of electrochemical impedance spectroscopy and I–V–P curves at various temperatures. Furthermore, as a point of comparison, a cell with an ASL was prepared using the dry pressing method, incorporating 20 wt.% graphite as a pore-forming agent. The freeze-cast anode-supported cell demonstrated a polarization resistance of 1.45 Ω cm2 at 550°C and 0.29 Ω cm2 at 750°C. Maximum achieved power densities were 0.189 and 0.429 W cm−2 at 550 and 750°C, respectively. For the cell fabricated by the dry pressing method, the maximum power densities were 0.158 and 0.397 W cm−2 at 550 and 750°C, respectively. Additionally, the tortuosity factor of the anode layer and the gas diffusion streamline in the direction of solidification were determined by using 3D X-ray tomography imaging and subsequent image processing.

采用冷冻铸造工艺制造的阳极支撑质子传导型固体氧化物燃料电池的结构和电化学研究
利用冷冻铸造技术开发了分层定向大孔镍氧化物-BaZr0.1Ce0.7Y0.2O3-δ(BZCY7)阳极支撑层(ASL)。通过扫描电子显微镜和 X 射线计算机断层扫描分析了所得到的冻铸结构。BZCY7 薄层被用作质子传导电解质,而 La1.9Sr0.1Ni0.7Cu0.3O3-δ - 钆掺杂铈 10% Gd(LSNC-GDC10)被用作阴极层并进行了评估。通过电化学阻抗光谱和不同温度下的 I-V-P 曲线评估了电池的性能。此外,作为对比,还采用干压法制备了带有 ASL 的电池,其中加入了 20 wt.% 的石墨作为孔隙形成剂。冷冻铸造阳极支撑电池在 550°C 时的极化电阻为 1.45 Ω cm2,在 750°C 时为 0.29 Ω cm2。在 550°C 和 750°C 时,达到的最大功率密度分别为 0.189 W cm-2 和 0.429 W cm-2。而采用干压法制造的电池,在 550 和 750°C 时的最大功率密度分别为 0.158 和 0.397 W cm-2。此外,通过三维 X 射线断层扫描成像和后续图像处理,确定了阳极层的曲折系数和凝固方向的气体扩散流线。
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来源期刊
Fuel Cells
Fuel Cells 工程技术-电化学
CiteScore
5.80
自引率
3.60%
发文量
31
审稿时长
3.7 months
期刊介绍: This journal is only available online from 2011 onwards. Fuel Cells — From Fundamentals to Systems publishes on all aspects of fuel cells, ranging from their molecular basis to their applications in systems such as power plants, road vehicles and power sources in portables. Fuel Cells is a platform for scientific exchange in a diverse interdisciplinary field. All related work in -chemistry- materials science- physics- chemical engineering- electrical engineering- mechanical engineering- is included. Fuel Cells—From Fundamentals to Systems has an International Editorial Board and Editorial Advisory Board, with each Editor being a renowned expert representing a key discipline in the field from either a distinguished academic institution or one of the globally leading companies. Fuel Cells—From Fundamentals to Systems is designed to meet the needs of scientists and engineers who are actively working in the field. Until now, information on materials, stack technology and system approaches has been dispersed over a number of traditional scientific journals dedicated to classical disciplines such as electrochemistry, materials science or power technology. Fuel Cells—From Fundamentals to Systems concentrates on the publication of peer-reviewed original research papers and reviews.
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