化工新型材料

化工新型材料 ›› 2024, Vol. 52 ›› Issue (2) : 160-165. DOI: 10.19817/j.cnki.issn1006-3536.2024.02.013

科学研究

Pr掺杂Sm_0.5Sr_0.5CoO₃阴极的性能研究

作者信息 +

Study on the performance of Pr-doped Sm_0.5Sr_0.5CoO₃ cathode

Deng Shuailei, Wang Bo, Sun Mingxu, Xia Yunyun, Chen Jing

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文章历史 +

Received		Published
2022-11-05		2024-02-20
Issue Date	Revised Date
2024-02-28	2022-11-05

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摘要

固体氧化物燃料电池(SOFC)因能量转换效率高,绿色无污染而备受关注。研究发现,钙钛矿结构的Sm_0.5Sr_0.5CoO_3-δ(SSC)是电子-离子混合导体,具有良好的氧还原活性,以及电导率高、极化电阻低等优点。为了探究镧系元素Pr掺杂对SSC阴极性能的影响,采用溶胶-凝胶法制备Pr_xSm_0.5-xSr_0.5CoO₃(x=0.1,0.2,0.3,0.4,0.5)阴极粉体,对其进行一系列表征和电化学性能测试。电化学阻抗谱(EIS)测试表明,当Pr掺杂量为0.3时,PSSC-30阴极在550～750℃范围内的极化电阻均小于其他掺杂量;在700℃时,全电池的功率密度达到最大,为311.06mW/cm²。

Abstract

Solid oxide fuel cells (SOFCs) have attracted much attention due to their high energy conversion efficiency and green pollution-free.It is found that Sm_0.5Sr_0.5CoO_3-δ (SSC) with perovskite structure is an electron-ion mixed conductor,showing good oxygen reduction activity,high conductivity and low polarization resistance.In order to investigate the effect of lanthanide Pr doping on the performance of SSC cathode,the Pr_xSm_0.5-xSr_0.5CoO₃ (x=0.1,0.2,0.3,0.4,0.5) cathode powders were prepared by sol-gel method,and their characterization and electrochemical performance were tested.The electrochemical impedance spectroscopy (EIS) test showed that when the Pr doping was 0.3,the polarization resistance of the PSSC-30 cathode was smaller than that of other doping amounts cathode in the range of 550～750℃.The power density of the full cell reached its maximum at 700℃,which was 311.06mW/cm².

关键词

Sm_0.5Sr_0.5CoO_3-δ / Pr掺杂 / 溶胶-凝胶法

Key words

Sm_0.5Sr_0.5CoO_3-δ / Pr-doped / sol-gel method

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Pr掺杂Sm_0.5Sr_0.5CoO₃阴极的性能研究[J]. 化工新型材料, 2024, 52(2): 160-165 DOI:10.19817/j.cnki.issn1006-3536.2024.02.013

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