提高低温固体氧化物燃料电池阴极的活性表面积和气体扩散性能,通过用光角度沉积喷
Jaewon Hwang1, Yangjae Kim1, Seungjae Lee1
1Department of Mechanical Engineering, Seoul National University, Seoul, Republic of Korea.
Small (Weinheim an der Bergstrasse, Germany)
|February 3, 2026
概括
凝视角度沉积 (GLAD) 产生高度多孔的La0.6Sr0.4Co0.2Fe0.8O3-δ (LSCF) 阴极. 这提高了薄膜固体氧化物燃料电池 (TF-SOFC) 的性能.
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
- 纳米技术 纳米技术
背景情况:
- 固体氧化物燃料电池 (SOFC) 需要高效的阴极材料以获得最佳性能.
- 对于La0.6Sr0.4Co0.2Fe0.8O3-δ (LSCF) 阴极的传统制造方法通常会导致有限的孔隙性和三相边界 (TPB) 密度.
- 开发先进的纳米结构阴极对于提高燃料电池效率和耐用性至关重要.
研究的目的:
- 报告使用视角沉积 (GLAD) 制造纳米孔隙单相LSCF薄膜阴极的有效方法.
- 研究喷雾压力和薄膜厚度对阴极形态,多孔性和TPB密度的影响.
- 评估GLAD制造的LSCF阴极在薄膜固体氧化物燃料电池 (TF-SOFC) 中的电化学性能.
主要方法:
- 采用视角沉积 (GLAD) 来创建纳米柱状LSCF薄膜,利用自影效应.
- 喷射压力和薄膜厚度被系统调整,以控制阴极纳米结构和多孔性.
- 为了评估阴极性能,进行了电化学阻抗光谱 (EIS) 和TF-SOFC性能测试.
主要成果:
- 与传统喷 (7.5%) 相比,GLAD制造的结果是显著更高的纳米柱状多孔性 (21.5%).
- 用GLAD制造的LSCF阴极在500°C时表现出明显较低的极化阻力 (6.4 Ω cm2) 与传统喷射膜 (32.9 Ω cm2) 相比.
- 带有优化的GLAD-LSCF阴极的TF-SOFC在550°C时实现了836mW cm-2的峰值功率密度.
结论:
- GLAD喷雾是一种高效的方法,用于设计具有可调整形态和高TPB密度的纳米孔状LSCF阴极.
- 纳米柱架构显著增强了气体扩散和表面交换动力学,从而提高了电化学性能.
- 这种方法为开发低温固体氧化物燃料电池 (LT-SOFCs) 的高性能阴极提供了一个有希望的战略.
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