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通过模板法制备的钐掺杂二氧化铈（SmCeO）电解质的微观结构与离子电导率研究

Microstructure and ionic conductivity investigation of samarium doped ceria (SmCeO) electrolytes prepared by the templating methods.

作者信息

Güçtaş Dilara, Sariboğa Vedat, Öksüzömer M A Faruk

机构信息

Department of Chemical Engineering, Faculty of Engineering, İstanbul University-Cerrahpaşa, İstanbul, Turkey.

出版信息

Turk J Chem. 2022 Feb 25;46(3):910-922. doi: 10.55730/1300-0527.3379. eCollection 2022.

DOI:10.55730/1300-0527.3379
PMID:37720606
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10503988/
Abstract

SmCeO (SDC20) electrolytes were synthesized with cellulose templating (CT) and PVA templating (PVAT) methods. Powder characteristics were examined using TG/DTA, XRD, and SEM. Pellets are sintered at various temperatures for different durations. Mean grain sizes were calculated from SEM micrographs using the linear intercept method. Grain growth behavior of the electrolytes was investigated and the dominant diffusion mechanism was examined. The grain growth activation energies were obtained for the first time for the mentioned electrolytes prepared by the mentioned methods. The ionic conductivities were calculated by electrochemical impedance spectroscopy. The highest ionic conductivity value was found to be 0.050 S cm for the cellulose templating method.

摘要

采用纤维素模板法（CT）和聚乙烯醇模板法（PVAT）合成了SmCeO（SDC20）电解质。使用热重/差示热分析（TG/DTA）、X射线衍射（XRD）和扫描电子显微镜（SEM）对粉末特性进行了研究。将颗粒在不同温度下烧结不同时间。使用线性截距法从SEM显微照片计算平均晶粒尺寸。研究了电解质的晶粒生长行为并考察了主要扩散机制。首次获得了通过上述方法制备的上述电解质的晶粒生长活化能。通过电化学阻抗谱计算离子电导率。发现纤维素模板法的最高离子电导率值为0.050 S/cm。

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