固体氧化物细胞的耐用和高度活跃的氧气电极:对分离抑制层状矿的新见解
Xu Han1,2,3, Kaixin Li1,2, Qi Shao1,2
1School of Physics, Harbin Institute of Technology, Harbin, Heilongjiang, 150001, China.
Advanced materials (Deerfield Beach, Fla.)
|May 3, 2025
概括
一个新的驱动策略增强了固体氧化物电池氧气电极,改善了Cr耐受性和催化活性. 这种方法抑制了离子分离,提高了商业化性能.
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
- 化学工程是化学工程的重要组成部分.
背景情况:
- 固体氧化物电池的商业化面临挑战,原因是含有Cr的相互连接产生的氧电极不稳定性.
- 含有Sr/Ba的矿易发生表面分离,导致Cr中毒和性能降低.
研究的目的:
- 开发一种以为导向的分层结构策略,以抑制阴离子表面分离.
- 为了增强固体氧化物细胞氧气电极的催化活性和 (Cr) 耐受性.
主要方法:
- 一个由驱动的分层矿结构的设计和合成: (La0.25Pr0.25Nd0.25Sm0.25) Ba0.5Sr0.5Co1.5Fe0.5O5+δ (LPNSBSCF).
- 研究了阴离子分离抑制机制,重点关注稀土层中的平面应变.
- 在含有Cr的条件下评估氧气电极稳定性和催化活性.
主要成果:
- 在各种含有Cr的条件下,LPNSBSCF氧气电极表现出显著改善的稳定性.
- 稀土层度增加产生的平面应变被确定为抑制性土壤分离的关键.
- 实现了高功率密度:2.12 W cm−2 在800°C (氧离子类型) 和1.41 W cm−2 在650°C (质子类型).
结论:
- 由驱动的分层结构策略有效地抑制了阴离子分离,并提高了氧气电极中的Cr耐受性.
- LPNSBSCF为稳定和高性能固体氧化物电池提供了一个有前途的解决方案.
- 这项工作为设计具有更好的催化活性和Cr电阻的先进氧气电极提供了理论指导.
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