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操作磁共振成像用于可视化电化学三相边界

Wen-Long Jiang¹, Shuo-Hui Cao^1,2, Chun-Yu Qiu¹

¹State Key Laboratory of Physical Chemistry of Solid Surfaces, MOE Key Laboratory of Spectrochemical Analysis & Instrumentation, Fujian Provincial Key Laboratory of Plasma and Magnetic Resonance, School of Electronic Science and Engineering, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, P.R. China.

Angewandte Chemie (International ed. in English)

|May 26, 2025

概括

操作电化学磁共振成像 (EC-MRI) 可视化燃料电池中的三相边界 (TPB) 动态. TPB的恶化,而不是水的积累,导致洪水,改进了电化学设备的设计.

科学领域:

电化学电化学电化学
材料科学材料科学材料科学
影像成像技术影像成像技术

背景情况:

三相边界 (TPB) 对燃料电池和电池等电化学设备至关重要.
传统的方法无法捕捉动态的TPB过程和洪水.
了解 TPB 演变是提高设备性能的关键.

研究的目的:

开发和应用操作电化学磁共振成像 (EC-MRI) 实时TPB可视化.
研究质子交换膜燃料电池 (PEMFCs) 的输出功率,水含量和TPB动态之间的关系.
为了阐明TPB洪水的主要原因.

主要方法:

运行电化学磁共振成像 (EC-MRI) 使用 ¹ H 敏感度.
在操作设备中进行批量和边界区域的非侵入式探测.
研究PEMFC,重点关注氧减少反应 (ORR).

主要成果:

在PEMFC运行期间,EC-MRI实时定量地映射了TPB演变.
TPB地图显示了与输出功率相关的显著空间和动态变化.
TPB的恶化被确定为洪水的直接原因,独立于水的积累.

结论:

操作EC-MRI提供了前所未有的洞察力,了解工作条件下的TPB行为.
TPB的恶化是PEMFC中引发洪水的关键因素.
这些发现为电化学设备和工艺中的水资源管理和TPB设计提供了新的策略.

关键词:

燃料电池是一种燃料电池.磁共振成像技术磁共振成像技术运营研究是运营研究.氧降解反应是氧降解反应.三相边界线的三相边界线是什么

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