Optimization of BaCe0.8Y0.2O3−δ-Ce0.8Sm0.2O2−δ Dual Conductive Composite Electrolyte for Low Temperature (430-520 °C) Solid Oxide Fuel Cells

IF 5.8 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Journal of Alloys and Compounds Pub Date : 2025-05-10 DOI:10.1016/j.jallcom.2025.180854

Ji Yu, Yongtao Huang, Jie Zheng, Ning Tian

{"title":"Optimization of BaCe0.8Y0.2O3−δ-Ce0.8Sm0.2O2−δ Dual Conductive Composite Electrolyte for Low Temperature (430-520 °C) Solid Oxide Fuel Cells","authors":"Ji Yu, Yongtao Huang, Jie Zheng, Ning Tian","doi":"10.1016/j.jallcom.2025.180854","DOIUrl":null,"url":null,"abstract":"This study systematically investigates the development and optimization of BCY-SDC (BaCe0.8Y0.2O3−δ-Ce0.8Sm0.2O2−δ) composite electrolytes for low-temperature solid oxide fuel cells (SOFCs). Through the controlled synthesis of varying BCY/SDC mass ratios (1:9 to 5:5), the structural, interfacial, and electrochemical properties were comprehensively characterized. The 3BCY-7SDC composite exhibited superior performance, achieving a peak power density of 786 mW/cm2 at 520°C and maintaining 723 mW/cm2 at 490°C, attributed to its homogeneous heterostructure and optimized ionic transport. The built-in electric field (BIEF) at BCY/SDC heterojunctions suppressed electronic conduction while enhancing O2− mobility. Elemental mapping confirmed the uniform distribution of Ba, Ce, Sm, Y, and O, stabilizing the heterophase boundaries. Impedance analysis demonstrated minimized ohmic impedance (0.194 Ω·cm2) and polarization impedance for 3BCY-7SDC, correlating with its exceptional low-temperature performance. These findings establish BCY-SDC composites as promising candidates for next-generation SOFCs operating below 600°C.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"109 1","pages":""},"PeriodicalIF":5.8000,"publicationDate":"2025-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Alloys and Compounds","FirstCategoryId":"88","ListUrlMain":"https://doi.org/10.1016/j.jallcom.2025.180854","RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}

引用次数: 0

Abstract

This study systematically investigates the development and optimization of BCY-SDC (BaCe_0.8Y_0.2O_3−δ-Ce_0.8Sm_0.2O_2−δ) composite electrolytes for low-temperature solid oxide fuel cells (SOFCs). Through the controlled synthesis of varying BCY/SDC mass ratios (1:9 to 5:5), the structural, interfacial, and electrochemical properties were comprehensively characterized. The 3BCY-7SDC composite exhibited superior performance, achieving a peak power density of 786 mW/cm² at 520°C and maintaining 723 mW/cm² at 490°C, attributed to its homogeneous heterostructure and optimized ionic transport. The built-in electric field (BIEF) at BCY/SDC heterojunctions suppressed electronic conduction while enhancing O²⁻ mobility. Elemental mapping confirmed the uniform distribution of Ba, Ce, Sm, Y, and O, stabilizing the heterophase boundaries. Impedance analysis demonstrated minimized ohmic impedance (0.194 Ω·cm²) and polarization impedance for 3BCY-7SDC, correlating with its exceptional low-temperature performance. These findings establish BCY-SDC composites as promising candidates for next-generation SOFCs operating below 600°C.

查看原文本刊更多论文

低温（430-520℃）固体氧化物燃料电池用BaCe0.8Y0.2O3−δ- ce0.8 sm0.2 o2−δ双导电复合电解质的优化

本研究系统地研究了低温固体氧化物燃料电池（SOFCs）用BCY-SDC （BaCe0.8Y0.2O3 - δ- ce0.8 sm0.2 o2 - δ）复合电解质的研制与优化。通过控制合成不同BCY/SDC质量比（1:9 ~ 5:5），全面表征了BCY/SDC的结构、界面和电化学性能。3BCY-7SDC复合材料表现出优异的性能，在520°C时达到786 mW/cm2的峰值功率密度，在490°C时保持在723 mW/cm2，这归功于其均匀的异质结构和优化的离子传输。BCY/SDC异质结的内置电场（BIEF）抑制了电子传导，同时增强了O2−的迁移率。元素映射证实了Ba、Ce、Sm、Y和O的均匀分布，稳定了异相边界。阻抗分析表明，3by - 7sdc的欧姆阻抗最小（0.194 Ω·cm2），极化阻抗最小，这与其优异的低温性能有关。这些发现表明BCY-SDC复合材料有望成为工作温度低于600°C的下一代sofc的候选材料。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Journal of Alloys and Compounds 工程技术-材料科学：综合

CiteScore

11.10

自引率

14.50%

发文量

5146

审稿时长

67 days

期刊介绍： The Journal of Alloys and Compounds is intended to serve as an international medium for the publication of work on solid materials comprising compounds as well as alloys. Its great strength lies in the diversity of discipline which it encompasses, drawing together results from materials science, solid-state chemistry and physics.