Characterization of The Pretreatment Effect on a Direct Methanol Fuel Cell

預處理對於直接甲醇燃料電池影響之特性

管衍德(Yean-Der Kuan) ； 江明潔(Ming-Chien Chiang) ； 張靜怡(Jing-Yi Chang) ； 李世鳴(Shi-Min Lee)

《中國機械工程學刊》 32卷4期 (2011/08) Pp. 285-292

https://doi.org/10.29979/JCSME.201108.0002

摘要

膜電極組的結構包含了質子交換膜、陽極觸媒、陽極擴散層、陰極觸媒與陰極擴散層等。膜電極組為直接甲醇燃料電池（DMFC）中的核心組件，亦是電化學反應所發生的地方。所以MEA特別地對於DMFC的效能有顯著的影響。因此，膜電極組的預處理相當重要，且其有助於膜電級組效能的穩定。預處理可以改變電極結構、提升高分子電解質的水合、激發電化學反應、與降低阻抗等。本研究探討兩種膜電極組的設計，其中Sample 1採用碳布為擴散層，Sample 2則採用碳紙為擴散層。當完成預處理後，各膜電極組將進行極化曲線與電化學阻抗頻譜分析量測。每一種膜電極組，經過不同條件的預處理後之效能將被探討。

並列摘要

Membrane electrode assembly (MEA) structures include a polymer electrolyte membrane, anode catalyst, anode diffusion layer, cathode catalyst, and a cathode diffusion layer. The MEA is the core of the direct methanol fuel cell (DMFC), where the electrochemical reaction occurs. Specifically, the MEA significantly affects fuel cell performance. Thus, MEA pretreatment is important as it helps to stabilize MEA performance. The pretreatment process changes the electrode structure and enhances the polymer electrolyte hydration, igniting the electrochemical reaction and reducing the resistance. This research investigates two MEA designs: Sample 1 adopts the carbon cloth GDL while Sample 2 adopts the carbon paper GDL. After pretreatment, the polarization curve and electrochemical impedance spectroscopy (EIS) measurements were taken for each MEA. The performance of each MEA type under different pretreatment conditions is determined.

並列關鍵字

direct methanol fuel cell ； pretreatment ； membrane electrolyte assembly ； electrochemical impedance spectroscopy