CeO2@La0.6Sr0.4Co0.2Fe0.8O3-δ 电解质的制备及半导体离子燃料电池性能研究

doi:10.11949/0438-1157.20240845

化工学报 ›› 2025, Vol. 76 ›› Issue (3): 1353-1362.DOI: 10.11949/0438-1157.20240845

• 材料化学工程与纳米技术 • 上一篇下一篇

CeO₂@La_0.6Sr_0.4Co_0.2Fe_0.8O_3-_δ 电解质的制备及半导体离子燃料电池性能研究

刘彦贝¹(), 王若名¹, 刘娟¹, Raza Taimoor¹, 陆玉正², Raza Rizwan³, 朱斌⁴, 李松波⁵, 安胜利⁶, 云斯宁¹()

^1.西安建筑科技大学材料科学与工程学院，陕西西安 710055
^2.南京晓庄学院电子工程学院，江苏南京 211171
^3.伊斯兰堡COMSATS大学物理系，巴基斯坦拉合尔 54000
^4.东南大学能源与环境学院，江苏南京 210096
^5.内蒙古科技大学化学与化工学院，内蒙古包头 014010
^6.内蒙古科技大学材料科学与工程学院，内蒙古包头 014010

收稿日期:2024-07-25 修回日期:2024-09-25 出版日期:2025-03-25 发布日期:2025-03-28
通讯作者: 云斯宁
作者简介:刘彦贝(2000—)，女，硕士研究生，yanbei@xauat.edu.cn
基金资助:
国家自然科学基金项目(51672208);陕西省自然科学基金重点项目(2019JZ?20);陕西省重点研发计划国际合作重点项目(2019KWZ?03);陕西省重点科技创新团队(2022TD?34);国家自然科学基金面上项目(51772080)

Preparation of CeO₂@La_0.6Sr_0.4Co_0.2Fe_0.8O_3-_δ electrolyte and its property in semiconductor ionic fuel cells performance

Yanbei LIU¹(), Ruoming WANG¹, Juan LIU¹, Taimoor Raza¹, Yuzheng LU², Rizwan Raza³, Bin ZHU⁴, Songbo LI⁵, Shengli AN⁶, Sining YUN¹()

^1.School of Materials Science and Engineering, Xi’an University of Architecture and Technology, Xi’an 710055, Shaanxi, China
^2.School of Electronic Engineering, Nanjing Xiaozhuang University, Nanjing 211171, Jiangsu, China
^3.Department of Physics, COMSATS University Islamabad, Lahore 54000, Pakistan
^4.School of Energy and Environment, Southeast University, Nanjing 210096, Jiangsu, China
^5.School of Chemistry and Chemical Engineering, Inner Mongolia University of Science and Technology, Baotou 014010, Inner Mongolia, China
^6.School of Materials Science and Engineering, Inner Mongolia University of Science and Technology, Baotou 014010, Inner Mongolia, China

Received:2024-07-25 Revised:2024-09-25 Online:2025-03-25 Published:2025-03-28
Contact: Sining YUN

摘要/Abstract

摘要：

开发高离子电导率的电解质对于提升半导体离子燃料电池（SIFC）在中低温下的电化学性能至关重要。为此，采用溶剂热法制备核-壳结构CeO₂@La_0.6Sr_0.4Co_0.2Fe_0.8O_3-_δ （CeO₂@LSCF）复合电解质材料，通过对其物相信息、微观形貌及价态演变进行分析，进一步将其作为SIFC电解质测试其电化学性能和燃料电池性能，研究核-壳结构异质界面电荷传输及内建电场作用机理。结果表明：550℃时，CeO₂@LSCF作为燃料电池的电解质，在1.08 V开路电压下，获得942.2 mW·cm^-2的最大输出功率密度。作为混合离子和电子导体的SIFC电解质材料，核-壳结构CeO₂@LSCF具有潜在的应用前景。

关键词: 复合材料, 燃料电池, 电解质, 核-壳结构, 内建电场, 异质结

Abstract:

Developing electrolytes with high ionic conductivity is crucial to improve the electrochemical performance of semiconductor ion fuel cells (SIFC) at medium and low temperatures. In this study, a solvothermal method was employed to synthesize a core-shell structured CeO₂@La_0.6Sr_0.4Co_0.2Fe_0.8O_3-_δ (CeO₂@LSCF) composite electrolyte material. The phase information, microstructure, and valence state evolution of the material were analyzed. Moreover, its electrochemical performance and fuel cell properties were systematically investigated when used as an electrolyte in SIFCs. The charge transfer mechanism and the role of the built-in electric field at the core-shell heterojunction interface were also examined. The experimental results demonstrated that at 550℃, the CeO₂@LSCF electrolyte exhibited a maximum power density of 942.2 mW·cm^-2 at an open circuit voltage of 1.08 V. As a mixed ion and electron conductor in SIFC electrolyte materials, the core-shell structured CeO₂@LSCF holds great potential for future applications.

Key words: composites, fuel cells, electrolytes, core-shell structure, built-in field, heterojunction

中图分类号:

O 611.62

刘彦贝, 王若名, 刘娟, Raza Taimoor, 陆玉正, Raza Rizwan, 朱斌, 李松波, 安胜利, 云斯宁. CeO₂@La_0.6Sr_0.4Co_0.2Fe_0.8O_3-_δ 电解质的制备及半导体离子燃料电池性能研究[J]. 化工学报, 2025, 76(3): 1353-1362.

Yanbei LIU, Ruoming WANG, Juan LIU, Taimoor Raza, Yuzheng LU, Rizwan Raza, Bin ZHU, Songbo LI, Shengli AN, Sining YUN. Preparation of CeO₂@La_0.6Sr_0.4Co_0.2Fe_0.8O_3-_δ electrolyte and its property in semiconductor ionic fuel cells performance[J]. CIESC Journal, 2025, 76(3): 1353-1362.

图/表 8

图1 SIFC结构图

Fig.1 Schematic diagram of SIFC structure

图2 CeO2@LSCF的结构与微观形貌

Fig.2 The structure and microstructure of CeO2@LSCF

图3 CeO2@LSCF和CeO2的XPS谱

Fig.3 The XPS spectra of CeO2@LSCF and CeO2

图4 CeO2@LSCF相关测试结果

Fig.4 CeO2@LSCF related test results

表1 CeO2@LSCF-SIFC在不同温度下的开路电压及最大功率密度

Table 1 CeO2@LSCF-SIFC open circuit voltage and maximum power density at different temperatures

Temperature/℃	Open-circuit voltage (OCV)/V	Maximum power density (P_max)/(mW·cm^-2)
450	1.204	312.5
475	1.190	428.1
500	1.109	603.1
525	1.108	745.3
550	1.080	942.2

表2 450~550℃时CeO2@LSCF电解质的欧姆阻抗及总电导率

Table 2 Ohmic resistance and total conductivity of CeO2@LSCF electrolyte at 450—550℃

Temperature/℃	R₀/Ω	R₁/Ω	σ_t/(S·cm^-1)
450	0.133	1.915	0.357
475	0.111	0.342	0.428
500	0.093	0.189	0.511
525	0.0793	0.062	0.599
550	0.0723	0.035	0.656

图5 CeO2和LSCF的紫外-可见光吸收光谱及紫外光电子能谱

Fig. 5 UV-visible absorption spectra and UV photoelectron spectra of CeO2 and LSCF

图6 复合电解质材料CeO2@LSCF的能带结构示意图

Fig.6 Schematic illustration of the band structure of the composite electrolyte material CeO2@LSCF

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CeO₂@La_0.6Sr_0.4Co_0.2Fe_0.8O_3-_δ 电解质的制备及半导体离子燃料电池性能研究

Preparation of CeO₂@La_0.6Sr_0.4Co_0.2Fe_0.8O_3-_δ electrolyte and its property in semiconductor ionic fuel cells performance

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