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首页> 外文会议>Electrochemical Society, Meeting;Symposium on Polymer Electrolyte Fuel Cells >In Situ Humidity Measurements at the CL Surface by MEMS-based Sensors
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In Situ Humidity Measurements at the CL Surface by MEMS-based Sensors

机译：基于MEMS的传感器在CL表面处于原位湿度测量

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Water management is essential for optimizing the performance of proton exchange membrane fuel cells. Then for measuring the local humidity inside membrane electrode assembly (MEA), the thin film humidity sensors (TFHS) are fabricated by the micro-electro-mechanical systems (MEMS) based techniques. The sensor was placed between the catalyst layer (CL) and the microporous layer (MPL) at the cathode. The sensor thickness is only about 9 μm, and the slight effects on total cell performance were observed with the insertion of it. In-situ measurement with a humidity sensor showed the capacitance and RH increased with the increase of the current density linearly up to 0.3 A/cm~2. The capacitance change became moderate in the region of current density 0.3 A/cm~2, because the relative humidity reached 100% at the 0.3 A/cm~2 and water started to accumulate.
机译：水管理对于优化质子交换膜燃料电池的性能至关重要。 然后为了测量膜电极组件（MEA）内的局部湿度，通过基于微电机械系统（MEMS）技术制造薄膜湿度传感器（TFHS）。 将传感器放置在阴极处的催化剂层（CL）和微孔层（MPL）之间。 传感器厚度仅为9μm，随着插入而观察到对总细胞性能的轻微影响。 利用湿度传感器的原位测量显示电容，RH随着电流密度的增加而增加至0.3a / cm〜2。 电容变化在电流密度0.3a / cm〜2的区域中变得温和，因为在0.3a / cm〜2中相对湿度达到100％，水开始积聚。

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