薄型雙極板設計與DMFC電池堆操作穩定分析

Thin bipolar plate design and performance on DMFC stack

李志宏(Chi-Hung Lee)

指導教授 ： 翁 芳 柏

元智大學/工程學院/機械工程學系/碩士(2007年)

https://doi.org/10.6838/YZU.2007.00086

摘要

電池堆（stack）體積主要來自雙極板，厚度的減少，可有效地降低電池堆的尺寸。本研究主要是降低電池堆體積，配合新商構MEA較佳的性能（在0.2V約有140 mW cm-2），明顯提升單位體積的發電功率。使用氧氣當燃料時，在1.4V下，電池堆的單位體積可達57 mW cm-3發電功率；空氣則有38 mW cm-3發電功率。長時間穩定性結果，可知燃料分配供給的均勻程度相當好。使用固定較佳的操作條件初步實驗不同負載下的甲醇消耗與水穿透結果得知，甲醇穿透量不受負載電流的影響，約為0.166 cc/min，而水穿透部份，在陰、陽極兩端的驗證計算，其穿透量隨著電流增加而增加，可作為日後系統水回收參考。

關鍵字

雙極板設計；直接甲醇燃料電池堆；甲醇消耗

並列摘要

The volume of stack is mainly from thickness of the bipolar plate. The research aims to reduce the volume of the stack, design new flow channel and make use of new commercial MEA(140mWcm-2 at 0.2V) to promote the performance of the stack.
The result of new design showed that stack performance of 57mWcm-3 at 1.4V when using oxygen as reactant and 38mWcm-3 at 1.4V when using air as reactant. The ability of distributing fuel was fine under observing stability during long time.
Fixing operating condition and testing different loading current was to observe the consumption of methanol and water crossover. The result showed that the methanol crossover was not affected by loading current, and the value of crossover was about 0.166cc/min. For water crossover, the value of crossover arose along with the loading of current increasing.

並列關鍵字

bipolar plate design； DMFC stack；consumption of methanol

參考文獻

【12】徐百禾，DMFC電池組最佳化設計與穩定性分析，元智

【1】Satoru Hikita , Kimitaka Yamane , Yasuo Nakajima ,

“Measurement of methanol crossover in direct

【2】杜承鑫，甲醇穿透對直接甲醇燃料電池性能影響之研究，元智

【4】Cecilia Bracchini , Valerio Indovina , Sergio De