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通过多分离抑制CeO2/ZrO2异质接口中的阴离子间扩散.

Amjad Hussain1, Yong Youn2, Beom-Su Kwon1

  • 1Hydrogen Fuel Cell Laboratory, Korea Institute of Energy Research (KIER), 152 Gajeong-ro, Yuseong-gu, Daejeon 34129, Korea.

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概括

剂分离有效地抑制了异质接口上的阴离子间扩散,通过降低阻力和提高耐用性来提高固体氧化物燃料电池的性能. 这种方法为材料设计提供了一种新的方法.

关键词:
异面接口是异面接口.相互传播的传播.分离隔离的分离.固体电解质是一种固体电解质.固体氧化物燃料电池是一种固体氧化物燃料电池.

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科学领域:

  • 材料科学 材料科学 材料科学
  • 化学工程是化学工程的重要组成部分.
  • 固态化学 固态化学

背景情况:

  • 异质界面上的阴离子间扩散是先进材料中有害的副作用反应.
  • 扩散屏障层通常用于减轻这个问题.
  • 控制间扩散对于优化材料性能和设备寿命至关重要.

研究的目的:

  • 提出和演示一种新的方法,通过使用剂分离来抑制阴离子间扩散.
  • 为了研究CeO2/ZrO2异构界面间扩散抑制的机制.
  • 评估拟议方法对固体氧化物燃料电池性能的影响.

主要方法:

  • 通过 dopant 分离制造纳米厚的扩散屏障层.
  • 使用在CeO2/ZrO2异构界面上的Sc受体剂分离.
  • 使用密度函数理论 (DFT) 来计算缺陷形成能量.

主要成果:

  • 对sc受体的剂分离有效地抑制了Ce-Zr在CeO2/ZrO2异构界面上的相互扩散.
  • DFT的计算显示,Sc层阻碍了CeO2层的空隙形成,降低了VCe4度.
  • 实施Sc分离层导致了较低的欧姆电阻和极化电阻,并提高了燃料电池的长期耐用性.

结论:

  • 补充剂分离是一种可行且有效的策略,可以抑制阴离子间扩散.
  • 该Sc分离层显著提高了基于氧化物复合材料的燃料电池的性能和耐用性.
  • 精心选择剂对于阻碍间扩散和实现优越的燃料电池性能至关重要.