Excellent electrolyte functionality of Sm-doped La2O3 wide band gap semiconductor for low temperature solid oxide fuel cells

IF 5.8 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Journal of Alloys and Compounds Pub Date : 2024-11-21 DOI:10.1016/j.jallcom.2024.177699

Jie Gao, Dong Zhong, Dan Zheng, Muhammad Akbar, Kun Chen, Cong Jiang, Yuanjing Meng, Baoyuan Wang

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引用次数: 0

Abstract

Sluggish ionic conductivity of electrolyte material at low operational temperature creates challenges in the commercialization of low-temperature solid oxide fuel cells (LT-SOFCs). It is imperative to develop promising electrolyte along with excellent ionic conductivity to realize the decent output power at low temperature. The present study proposes a wide band gap semiconductor samarium doped lanthanum oxide (SLO), and its electrolyte functionality was evaluated in LT-SOFCs. The SOFC based on SLO electrolyte achieved promising performance of 977 mW cm^-2 along with high open circuit voltage of 1.02 V at 550 ℃. Sm doping in lanthanum significantly decrease the grain boundary resistance in the SLO electrolyte. Conductivity tests show that SLO possess both proton and oxygen ion conductivities, and which are significantly improved after Sm doping. Furthermore, on performing durability test the cell persistently get stable for 20 hours. This work demonstrates the potential of SLO as a high-performance electrolyte for LT-SOFCs.

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用于低温固体氧化物燃料电池的 Sm 掺杂 La2O3 宽带隙半导体的优异电解质功能

电解质材料在低工作温度下的离子导电性较弱，这给低温固体氧化物燃料电池（LT-SOFC）的商业化带来了挑战。当务之急是开发出具有良好离子传导性的电解质，以便在低温条件下实现良好的输出功率。本研究提出了一种宽带隙半导体掺钐氧化镧（SLO），并对其在低温固体氧化物燃料电池中的电解质功能进行了评估。基于 SLO 电解质的 SOFC 在 550 ℃ 时实现了 977 mW cm-2 的良好性能和 1.02 V 的高开路电压。在 SLO 电解质中，镧中的 Sm 掺杂大大降低了晶界电阻。电导率测试表明，SLO 具有质子和氧离子电导率，掺入 Sm 后电导率明显提高。此外，在进行耐久性测试时，电池可在 20 小时内保持稳定。这项工作证明了 SLO 作为 LT-SOFC 的高性能电解质的潜力。

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来源期刊

Journal of Alloys and Compounds 工程技术-材料科学：综合

CiteScore

11.10

自引率

14.50%

发文量

5146

审稿时长

67 days

期刊介绍： The Journal of Alloys and Compounds is intended to serve as an international medium for the publication of work on solid materials comprising compounds as well as alloys. Its great strength lies in the diversity of discipline which it encompasses, drawing together results from materials science, solid-state chemistry and physics.