Investigating the vapour transport phenomena inside the cathode gas diffusion layer media by controlling local temperature gradient inside an operating proton exchange membrane fuel cell
Investigating the vapour transport phenomena inside the cathode gas diffusion layer media by controlling local temperature gradient inside an operating proton exchange membrane fuel cell
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DOI：
10.1016/j.electacta.2020.137383
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发表时间：
2021-01-01
影响因子：
6.6
通讯作者：
Araki, Takuto
中科院分区：
文献类型：
--
作者：
Shigemasa, Kaito;Sato, Hayate;Araki, Takuto
水管理对质子交换膜燃料电池（PEMFC）的功能至关重要。阴极气体扩散层（GDL）的局部温度梯度影响PEMFC的水管理。这一点已经为人所知，并且已经讨论了好几年。本研究利用微机电系统（MEMS）技术开发了一种细（测试直径约30 μ m）和薄（厚度约6 μ m）薄膜热电偶（TFTC），通过对其进行外部控制，研究了温度梯度对PEMFC内部的影响。此外，x射线计算机断层扫描（CT）已被选择作为一种可视化操作中的PEMFC内部的方法。首次实现了温度梯度和液态水分布的同步测量。综上所述，阴极催化剂涂膜（CCM）侧温度高于通道侧温度时，PEMFC性能急剧下降。PEMFC性能的差异是由水凝结优先位置的不同引起的。(c) 2020 Elsevier Ltd.版权所有。
Water management is critical for the function of the proton exchange membrane fuel cell (PEMFC). The local through-thickness temperature gradient of the cathode gas diffusion layer (GDL) affect water management for a PEMFC. That has been known and been targeted for the discussion for several years. In this study, the effects of temperature gradient inside PEMFC was investigated by controlling it externally with a fine (testing diameter about 30 mu m) and thin (thickness about 6 mu m) thin-film thermocouple (TFTC), which has been developed using micro electromechanical system (MEMS) technology. In addition, X-ray computed tomography (CT) has been chosen as a method to visualise inside of an operating PEMFC. The simultaneously measurement of temperature gradient and liquid water distribution was firstly accomplished. In conclusion, in the case where the temperature of the cathode catalyst coated membrane (CCM) side is higher than that of the channel side, the PEMFC performance drastically decreased. The difference in PEMFC performance was caused by a difference the preferential sites for water condensation. (c) 2020 Elsevier Ltd. All rights reserved.