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通过固态合成在Ba基矿中进行B站点工程,释放了SOFC中的高功率密度.

Sefiu Abolaji Rasaki¹, Mmakeng John Otsweleng¹, Hassan Idris Abdu²

¹Department of Chemical and Petroleum Engineering, University of Calgary, Calgary, AB, TN2 1N4, Canada.

Small (Weinheim an der Bergstrasse, Germany)

|July 30, 2025

概括

三个新的矿阴极显示出固体氧化物燃料电池 (SOFC) 的前景. 材料组成和微观结构在700°C以下的温度下影响性能,从而实现高效的能量转化.

关键词:

拉德尔斯登黄类型的岩石.阴极电极是阴极电极的电极.高功率密度的高功率密度.低温固体氧化物燃料电池是一种低温固体氧化物燃料电池.氧降解反应是减少氧的反应.

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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:

固体氧化物燃料电池 (SOFC) 需要先进的阴极材料才能高效运行.
为中温SOFC (≤700°C) 开发稳定高性能阴极至关重要.
矿氧化物是有前途的候选人,因为它们的调节性质.

研究的目的:

为SOFCs合成和评估基于矿的新型阴极材料.
研究材料组成,微观结构和电化学性能之间的关系.
了解氧含量和B位点兴奋剂对阴极行为的作用.

主要方法:

固态反应合成使用坎佛作为孔隙形成剂.
在SOFC配置中对阴极材料的电化学表征.
对热稳定性和表面/格子氧气效应的分析.

主要成果:

三种新的矿材料 (Ba3CoNb2O9,Ba3FeNb2O9,Ba6CoFeNb9O30) 已经成功合成.
由于表面积更大,Ba3CoNb2O9和Ba3FeNb2O9在550°C以下显示出更高的功率密度.
在更高的温度 (≥600°C) 下,Ba6CoFeNb9O30由于更好地利用氧气,表现出更好的性能.
所有材料都表现出高热稳定性,性能优于许多现有的SOFC阴极.

结论:

工程化矿阴极组成和微观结构是高效SOFC的关键.
这些新型材料在降低温度下提供了稳定和高性能SOFC运行的潜力.
了解氧气固体测量和兴奋剂效应对于优化阴极设计至关重要.