Ni/YSZ阳极浸渍La2O3对SOFC电池抗积碳的影响

doi:10.15541/jim20160279

无机材料学报 ›› 2017, Vol. 32 ›› Issue (3): 241-246.DOI: 10.15541/jim20160279

Ni/YSZ阳极浸渍La₂O₃对SOFC电池抗积碳的影响

程亮, 罗凌虹, 石纪军, 孙良良, 徐序, 吴也凡, 胡佳幸

(景德镇陶瓷大学国家日用及建筑陶瓷工程技术中心, 景德镇 333001)

收稿日期:2016-04-25 修回日期:2016-07-25 出版日期:2017-03-20 网络出版日期:2017-02-24
作者简介:程亮(1981–), 男, 硕士, 助理研究员. E-mail: chengl-1981@163.com
基金资助:
国家自然科学基金(51462011, 51662015) National Natural Science Foundation of China (51462011, 51662015)

Ni/YSZ Anode Impregnated La₂O₃ on Anti-carbon Deposition of SOFC Cell

CHENG Liang, LUO Ling-Hong, SHI Ji-Jun, SUN Liang-Liang, XU Xu, WU Ye-Fan, HU Jia-Xing

(Jingdezhen Ceramic Institute, National Engineering Research Center for Domestic & Building Ceramics, Jingdezhen 333001, China)

Received:2016-04-25 Revised:2016-07-25 Published:2017-03-20 Online:2017-02-24
About author:CHENG Liang. E-mail: chengl-1981@163.com

摘要/Abstract

摘要：

以水系流延法制备阳极支撑型平板式IT-SOFC的阳极/电解质(Ni-YSZ/YSZ)半电池, 通过浸渍La₂O₃颗粒对半电池阳极进行改性, LSM+8YSZ为阴极制备单电池。采用扫描电子显微镜(SEM)观察单电池显微结构; 利用能谱(EDS)测试阳极成分; 单电池以乙醇水蒸气为燃料, 在750℃下利用循环伏安法测试单电池的功率密度, 交流阻抗法测试单电池的阻抗。结果表明: 单电池Ni/YSZ阳极孔洞中浸渍的La₂O₃颗粒约90 nm; 浸渍改性的电池比未浸渍的电池具有更稳定的电性能, 随着La₂O₃浸渍量越来越多, 电池的电性能和稳定性越来越好, 抗积碳能力越来越强。当浸渍量为2.4wt%时, 以乙醇水蒸气为燃料在750℃下运行7 h后, 电池衰减率仅为0.09%/h。

关键词: 固体氧化物燃料电池, 抗积碳, La2O3, 浸渍

Abstract:

For the planar anode-supported solid oxide fuel cell with Ni-YSZ anode, YSZ electrolyte was prepared by aqueous tape casting and La₂O₃ was impregnated into the Ni-YSZ anode. Traditional composite LSM-YSZ was used as the cathode. Microstructure and composition of the single cell were measured by scanning electron microstrscope(SEM)and energy dispersive spectra(EDS). When using ethanol/steam as fuel, the power density and impedance spectra of the single cell were measured by cyclic voltammetry and AC impedance method at 750℃. The results showed that impregnated La₂O₃ particles with size of 90 nm were distributed uniformly around the pores of the anode. The single cell with impregnated La₂O₃ exhibited more stable performance than the cell without impregnated La₂O₃. With the increase of loading of La₂O₃, the single cell showed better performance and better anti-carbon deposition ability. The results show that degradation rate of the single cell is 0.09%/h after operating at 7 h with the La₂O₃loading of 2.4wt%.

Key words: solid oxide fuel cell (SOFC), anti-carbon deposition, La2O3, impregnation

中图分类号:

TQ174

程亮, 罗凌虹, 石纪军, 孙良良, 徐序, 吴也凡, 胡佳幸. Ni/YSZ阳极浸渍La₂O₃对SOFC电池抗积碳的影响[J]. 无机材料学报, 2017, 32(3): 241-246.

CHENG Liang, LUO Ling-Hong, SHI Ji-Jun, SUN Liang-Liang, XU Xu, WU Ye-Fan, HU Jia-Xing. Ni/YSZ Anode Impregnated La₂O₃ on Anti-carbon Deposition of SOFC Cell[J]. Journal of Inorganic Materials, 2017, 32(3): 241-246.

图/表 6

图1 阳极浸渍La2O3的断面SEM照片

Fig. 1 SEM images of La2O3 impregnation anode section(a) Single cell; (b) 0wt%; (c) 2.4wt%

图2 浸渍La2O3的阳极断面SEM-EDS分析结果(5000X)

Fig. 2 SEM-EDS results of La2O3 impregnation anode section

图3 不同La2O3浸渍量单电池I-V-P和EIS曲线

Fig. 3 I-V-P and EIS curves of cells with different amounts of La2O3 impregnation(a) 0wt%; (b) 1.1wt%; (c) 1.9wt%; (d) 2.4wt%

图4 不同单电池运行稳定性曲线

Fig. 4 Stability curves of different cells

图5 乙醇为燃料, 不同La2O3浸渍量单电池SEM-EDS图谱(5000X)

Fig. 5 SEM-EDS of cells with different amounts of La2O3 impregnation using ethanol as fuel(a) 0wt%; (b) 2.4wt%

图6 未浸渍La2O3单电池以乙醇为燃料运行3.5 h后阳极断面SEM照片

Fig. 6 SEM images of cell without La2O3 impregnation using ethanol as fuel after 3.5 h

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Ni/YSZ阳极浸渍La₂O₃对SOFC电池抗积碳的影响

Ni/YSZ Anode Impregnated La₂O₃ on Anti-carbon Deposition of SOFC Cell

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