In Situ Humidity Measurements at the CL Surface By MEMS-Based Sensors Catalyst Layer
In Situ Humidity Measurements at the CL Surface By MEMS-Based Sensors Catalyst Layer
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通过基于 MEMS 的传感器催化剂层对 CL 表面进行原位湿度测量
DOI：
10.1149/06917.0471ecst
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发表时间：
2015
期刊：
影响因子：
--
通讯作者：
and Takuto Araki
中科院分区：
文献类型：
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作者：
Jun Tsujikawa;Ryotaro Minami;and Takuto Araki
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）内部的局部湿度，薄膜湿度传感器（TFHS）的微机电系统（MEMS）为基础的技术制作。将传感器放置在阴极处的催化剂层（CL）和微孔层（MPL）之间。传感器的厚度仅为9 μm左右，对电池的整体性能影响很小.用湿度传感器进行的现场测量表明，当电流密度达到0.3A/cm 2时，电容和相对湿度随电流密度的增加而线性增加.在电流密度为0.3A/cm 2时，相对湿度达到100%，水开始积累，电容变化在0.3A/cm 2时变得平缓。
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.