Multidoped CeO2 single-phase as electrolyte for IT-SOFC

IF 3 4区材料科学 Q3 CHEMISTRY, PHYSICAL

Solid State Ionics Pub Date : 2024-08-02 DOI:10.1016/j.ssi.2024.116645

Marija Stojmenović , Neda Nišić , Milan Kragović , Jelena Gulicovski , Francesco Basoli , Danica Bajuk-Bogdanović , Milan Žunić

{"title":"Multidoped CeO2 single-phase as electrolyte for IT-SOFC","authors":"Marija Stojmenović , Neda Nišić , Milan Kragović , Jelena Gulicovski , Francesco Basoli , Danica Bajuk-Bogdanović , Milan Žunić","doi":"10.1016/j.ssi.2024.116645","DOIUrl":null,"url":null,"abstract":"<div>This paper explores the application of nanosized, sintered, non-stoichiometric CeO2 with six dopants Ce0.8Nd0.0025Sm0.0025Gd0.005Dy0.095Y0.095O2-δ (CNSGDY), synthesized via modified glycine-nitrate procedure (MGNP) and room temperature self-propagating reaction (SPRT) for fuel cells. The composition, microstructure, and morphology of CNSGDY samples were analyzed using XRD, Raman spectroscopy, SEM, and EDS. The concentration of O2− vacancies, enabling the improvement of ionic conduction, was measured by the deconvolution procedure of additional Raman modes (250 cm−1 (2TA), 560 cm−1 (2LA) and 610 cm−1 (2TO)) and total values for MGNP and SPRT CNSGDY were 15.89% and 16.06%, respectively. Electrochemical performance assessed through EIS ((Electrochemical Impedance Spectroscopy) in the 550–700 °C range revealed a maximum power density of 55 mWcm−2 at 700 °C with SPRT electrolyte. Additionally, the ionic conductivity of the samples was calculated, with the SPRT sample showing superior performance due to higher ionic conductivity values. Differences in power densities between Pt/SPRT/Pt and Pt/MGNP/Pt cells suggest electrode-electrolyte interface and film thickness impacts, guiding future research.</div>","PeriodicalId":431,"journal":{"name":"Solid State Ionics","volume":"414 ","pages":"Article 116645"},"PeriodicalIF":3.0000,"publicationDate":"2024-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Solid State Ionics","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0167273824001930","RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}

引用次数: 0

Abstract

This paper explores the application of nanosized, sintered, non-stoichiometric CeO₂ with six dopants Ce_0.8Nd_0.0025Sm_0.0025Gd_0.005Dy_0.095Y_0.095O_2-δ (CNSGDY), synthesized via modified glycine-nitrate procedure (MGNP) and room temperature self-propagating reaction (SPRT) for fuel cells. The composition, microstructure, and morphology of CNSGDY samples were analyzed using XRD, Raman spectroscopy, SEM, and EDS. The concentration of O²⁻ vacancies, enabling the improvement of ionic conduction, was measured by the deconvolution procedure of additional Raman modes (250 cm⁻¹ (2TA), 560 cm⁻¹ (2LA) and 610 cm⁻¹ (2TO)) and total values for MGNP and SPRT CNSGDY were 15.89% and 16.06%, respectively. Electrochemical performance assessed through EIS ((Electrochemical Impedance Spectroscopy) in the 550–700 °C range revealed a maximum power density of 55 mWcm⁻² at 700 °C with SPRT electrolyte. Additionally, the ionic conductivity of the samples was calculated, with the SPRT sample showing superior performance due to higher ionic conductivity values. Differences in power densities between Pt/SPRT/Pt and Pt/MGNP/Pt cells suggest electrode-electrolyte interface and film thickness impacts, guiding future research.

Abstract Image

查看原文本刊更多论文

将多掺杂 CeO2 单相作为 IT-SOFC 的电解质

本文探讨了通过改性硝酸甘油法（MGNP）和室温自激反应（SPRT）合成的具有六种掺杂剂 CeNdSmGdDyYO（CNSGDY）的纳米烧结非全度 CeO 在燃料电池中的应用。利用 XRD、拉曼光谱、SEM 和 EDS 分析了 CNSGDY 样品的成分、微观结构和形态。通过附加拉曼模式（250 cm (2TA)、560 cm (2LA) 和 610 cm (2TO)）的解卷积程序测量了可改善离子传导的 O 空位浓度，MGNP 和 SPRT CNSGDY 的总值分别为 15.89% 和 16.06%。通过 EIS（电化学阻抗谱）对 550-700 °C 范围内的电化学性能进行评估，发现 SPRT 电解质在 700 °C 时的最大功率密度为 55 mWcm。此外，还计算了样品的离子电导率，SPRT 样品的离子电导率值更高，因此性能更优。Pt/SPRT/Pt 和 Pt/MGNP/Pt 电池之间功率密度的差异表明电极-电解质界面和薄膜厚度会产生影响，这为今后的研究提供了指导。

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

Solid State Ionics 物理-物理：凝聚态物理

CiteScore

6.10

自引率

3.10%

发文量

152

审稿时长

58 days

期刊介绍： This interdisciplinary journal is devoted to the physics, chemistry and materials science of diffusion, mass transport, and reactivity of solids. The major part of each issue is devoted to articles on: (i) physics and chemistry of defects in solids; (ii) reactions in and on solids, e.g. intercalation, corrosion, oxidation, sintering; (iii) ion transport measurements, mechanisms and theory; (iv) solid state electrochemistry; (v) ionically-electronically mixed conducting solids. Related technological applications are also included, provided their characteristics are interpreted in terms of the basic solid state properties. Review papers and relevant symposium proceedings are welcome.