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纳米晶体工程薄膜伊特里亚稳定电解质的低温固体氧化物燃料电池
Sangbong Ryu1,2, In Won Choi2, Yang Jae Kim2
1Center for Energy Research, University of California San Diego, 9500 Gilman Drive, La Jolla, California 92093, United States.
ACS applied materials & interfaces
|September 4, 2023
概括
通过反应性喷雾利用伊特里亚稳定 (YSZ) 制造薄膜电解质可显著提高低温固体氧化物燃料电池 (SOFC) 的性能. 优化喷射压力可以改善微观结构,从而提高功率密度.
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:
- 低温固体氧化物燃料电池 (SOFC) 由于电解质中的氧离子导电缓慢而受到影响.
- 电解质性能受到厚度以外的因素的影响,包括粗度,颗粒大小和内部应力.
- 开发高性能薄膜电解质对于推进SOFC技术至关重要.
研究的目的:
- 通过反应喷雾,使用伊特里亚稳定 (YSZ) 制造高性能薄膜电解质.
- 研究喷室压力对YSZ薄膜微观结构和电解质性能的影响.
- 为了确定YSZ微观结构和氧化支持的SOFCs的性能之间的相关性.
主要方法:
- 使用反应喷雾来沉积YSZ薄膜电解质.
- 喷射室压力变化 (5,10和15mTorr) 来研究它们的影响.
- YSZ薄膜电解质被集成到具有Ni阳极和Pt阴极的SOFC中.
主要成果:
- 增加的喷射压力导致YSZ薄膜的表面积更大,粒径更大,以及剩余的拉力应力.
- 在15mTorr下沉积的YSZ薄膜电解质表现出最低的欧姆电阻.
- 使用在15mTorr沉积的YSZ的SOFC在500°C时达到493mW/cm2的最大功率密度,是5mTorr (94.1mW/cm2) 沉积的五倍以上.
结论:
- 优化喷射压力是提高SOFC中YSZ薄膜电解质性能的一个关键因素.
- 通过喷雾压力控制的YSZ微结构显著提高了低温SOFC性能.
- 这项研究通过优化单个电解质制造条件,在低工作温度下显示出异常高的性能.
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