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A battery is a galvanic cell that is used as a source of electrical power for specific applications. Modern batteries exist in a multitude of forms to accommodate various applications, from tiny button batteries such as those that power wristwatches to the very large batteries used to supply backup energy to municipal power grids. Some batteries are designed for single-use applications and cannot be recharged (primary cells), while others are based on conveniently reversible cell reactions that...
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通过创建低温固体氧化物燃料电池的3D多尺度微纳米结构,在氧化物电极上实现快速氧化减排.

Gene Yang1, Sang-Hoon Nam2, Gina Han2

  • 1Department of Mechanical Engineering, University of South Carolina, Columbia, South Carolina 29208, United States.

ACS applied materials & interfaces
|October 19, 2023
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概括

研究人员使用3D打印和脉冲激光沉积开发了一种用于低温固体氧化物燃料电池 (SOFC) 的新型3D阴极. 这种设计显著提高了氧降解反应 (ORR) 活性,以提高燃料电池性能.

关键词:
通过3D打印打印3D打印.添加剂制造 添加剂制造 添加剂制造电解质是一种电解质.氧降解反应反应的氧降解反应脉冲激光沉积脉冲激光沉积固体氧化物燃料电池是一种固体氧化物燃料电池.立体石版印刷是一种立体石版印刷.薄膜电极是一种薄膜电极.

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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:

  • 快速氧降解反应 (ORR) 对于低温固体氧化物燃料电池 (SOFC) 是至关重要的.
  • 三维 (3D) 阴极结构为改善电化学性能提供了潜力,但在制造和稳定性方面面临挑战.

研究的目的:

  • 设计和制造一种新的3D阴极架构,以增强SOFC中的ORR活动.
  • 研究3D微纳米结构对La0.8Sr0.2CoO3-δ (LSC) 阴极的电化学性能的影响.

主要方法:

  • 使用一种新的制造工艺,结合3D打印和脉冲激光沉积 (PLD).
  • 创建了3D打印的yttria稳定ZrO (YSZ) 微结构作为LSC沉积的支架.
  • 使用扫描电子显微镜和能量分散式X射线微分析来描述微结构.
  • 使用电导放松 (ECR) 和电化学阻抗光谱学量化氧表面交换系数 (kchem).

主要成果:

  • 成功制造出没有裂和空隙的3DYSZ微结构,具有均的LSC薄膜沉积.
  • 与散装LSC相比,在氧表面交换系数 (kchem) 中实现了高达3个数量级的显著提升.
  • 证明了增强的ORR活动归因于3DYSZ微结构提供的增加的表面积.

结论:

  • 新的3D LSC微纳米阴极结构显著提高了ORR活动.
  • 结合3D打印和PLD方法使SOFCs的多功能和稳定的阴极制造成为可能.
  • 这种建筑设计代表了推进低温SOFC技术的有希望的战略.