持久的带造三层La0.8Sr0.2Ga0.8Mg0.2O3‐δ电解质与透电极用于中间温度固体氧化物燃料电池
Daniel Sikstrom1, Venkataraman Thangadurai1,2
1Department of Chemistry, University of Calgary, Calgary, Alberta T2N 1N4, Canada.
概括
这项研究使用新的电解质和电极设计增强了固体氧化物燃料电池 (SOFC). 优化的NdBaCoFeO5+δ负载显著降低了电阻,提高了可持续能源的功率密度.
科学领域:
- 材料科学 材料科学 材料科学
- 电化学 电化学 电化学
- 能源转换 能源转换
背景情况:
- 全球能源需求正在转向可持续的替代能源.
- 固体氧化物燃料电池 (SOFC) 是一种高效,低排放的电能解决方案.
- 中间温度 (600-800°C) SOFC的性能受到电解质和电极设计的限制.
研究的目的:
- 为了制造和表征一个三层La0.8Sr0.2Ga0.8Mg0.2O3-δ电解质.
- 为了优化 NdBaCoFeO5+δ (NBCF) 和 Ni-Gd-doped-Ce (Ni-GDC) 阳极材料的透.
- 为了评估开发的SOFC的电化学性能.
主要方法:
- 磁带造方法用于制造三层 (有孔/密度/有孔) 电解质.
- 穿透多孔的La0.8Sr0.2Ga0.8Mg0.2O3-δ脊柱,使用NBCF和Ni-GDC阳极.
- 电化学阻抗光谱 (EIS),放松时间的分布函数 (DFRT) 和同等电路建模.
主要成果:
- 制造了一种烧结的三层电解质,具有~55μm多孔层和~20μm密度的电解质.
- 确定了1.58mg/cm2的最佳NBCF负载,最大限度地减少了电荷转移和扩散电阻.
- 在800°C时,面积特异性电阻降低到0.025 Ω cm2.
- 达到400mW/cm2的峰值功率密度在750°C以低欧姆 (0.11 Ω cm2) 和偏振 (0.33 Ω cm2) 电阻实现.
结论:
- 开发的三层电解质和优化的NBCF负载显著提高了SOFC性能.
- 这一进步有助于开发高效和低排放的中温SOFC.
- 这些发现为能SOFC在可持续能源生产中的实际应用铺平了道路.
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