在现场表征铁铁矿矿,用于作为固体氧化物电池的电极
Maria Carmenza Diaz Lacharme1, Martina Marasi1, Virginia Pérez Dieste2
1Department of Energy, Politecnico di Milano, Via Lambruschini 4, Milan 20156, Italy.
ACS applied energy materials
|February 13, 2026
概括
在酸矿石 (STF-Ni) 中的兴奋剂通过提高氧化还原稳定性和CO2耐受性来提高固体氧化物细胞的性能. 在还原过程中形成Ni-Fe合金纳米粒子,有助于电催化,但也导致二氧化碳环境中碳酸盐的形成.
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
- 催化剂是一种催化剂.
背景情况:
- 矿材料对于固体氧化物电池 (SOC) 应用至关重要,特别是作为电极材料.
- 在操作条件下了解矿的氧化还原行为和表面化学,对于优化SOC性能至关重要.
- 尼克尔兴奋剂正在探索以提高基于酸 (SrTi-O3) 的矿的电化学特性和稳定性.
研究的目的:
- 为了研究Ni-化SrTi-O3 (STF-Ni) 和未化SrTi-O3 (STF) 矿的氧化还原行为,表面成分和电化学性能.
- 检查尼兴奋剂对金属溶解的作用及其在SOC应用中矿中的可逆性.
- 在H2氧化和CO2电解条件下,评估STF-Ni和STF作为SOC中的燃料电极的性能.
主要方法:
- 在降解大气层 (5% H2) 下的现场X射线衍射 (XRD) 高达750°C.
- 在降解 (H2) 和氧化 (CO2) 大气下,近环境压力X射线光电子光谱 (XPS).
- 使用STF-Ni和STF作为燃料电极,对电解质支持的固体氧化物电池进行电化学测试.
主要成果:
- 在STF-Ni中Ni的注导致了降解过程中合金Ni-Fe纳米颗粒的形成,在再氧化时Ni的部分再合并.
- 无兴奋剂的STF降解导致金属Fe颗粒的分离,而两种矿都表现出通过金属溶解增强的Sr分离 (SrOx).
- 暴露于CO2会导致SrCO3的形成和STF-Ni的组成变化,导致Ni的丰富,并影响CO2电解中的电极性能.
结论:
- 在SrTi-O3矿中Ni注会影响出溶性行为和表面化学,影响固体氧化物细胞中的电化学性能.
- 与STF相比,STF-Ni在H2电氧化中表现出优异的性能,这归因于改善的氧化还原稳定性和催化活性.
- 在二氧化碳电解中,STF-Ni和STF的性能相似,二氧化碳的相互作用导致电极被动化和组成变化.
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