高功率膜材應用在低相對濕度質子交換膜燃料電池之材料與製程研究探討

The research on material and preparation of High Power Membrane at low humidify Proton Exchange Membrane Fuel Cell

歐修銘(Hsiou-Ming Ou)

指導教授 ： 翁芳柏

元智大學/工程學院/機械工程學系/碩士(2013年)

https://doi.org/10.6838/YZU.2013.00260

摘要

質子交換膜燃料電池系統若能保持電池的性能與耐用性，需要水來維持其操作過程中的離子導電度；為了使燃料電池操作在適當的環境下，通常會在系統內裝置增濕器，但必須減輕系統重量、空間及簡化系統，因此希望能開發在無外部增濕的條件下，使得質子交換膜燃料電池能順利運行。
本實驗使用燃料的化學計量數、電池溫度以及燃料入口的的加濕溫度，來研究參數對燃料電池的影響，化學量計在(1.2、4)中電池性能達到最佳化，因氣體較充足而電池反應較為完全；藉由二氧化矽的親水性，使電池能較易操作在低相對濕度的條件下，發現添加些許的二氧化矽可使得膜材擁有保水性，在低相對濕度下能有較佳的性能；燃料電池在不同應用端和使用方式，也會影響膜電極組壽命的長短，為了探討老化的影響，本論文利用循環電流動態負載的方式作為加速老化機制。

關鍵字

觸媒層 ； 相對濕度 ； 二氧化矽 ； 加速老化 ； 動態負載

並列摘要

To maintain the efficiency and maintenance of battery, proton exchange membrane fuel cell needs water sufficient to keep its ionic conductivity. However, the proper environment for proton exchange membrane fuel cell demands an interior humidifier. This experiment tried to decrease the weight, and to simplify the system, which still make possible the operation of the proton exchange membrane fuel cell even without external humidifying.
The experiment selected the number of stoichiometric fuel, the fuel cell temperature and humidification temperature of the fuel inlet, in order to study the amount of the impact of chemical parameters on the battery meter optimal battery performance in the 1.2/4, because gas reaction than adequate to cause the battery to more completely. It was found that warer-holding capacity of the membrane was increased due to the addition of SiO2, results show better performance for the cell to operate under low humidity. The effect PEMFC has on the lifetime of MEA varies with different applications and conditions, the current cycle from dynamic load was used to investigate the effects of this degradation.

並列關鍵字

Catalyst layer ； Low relative humidity ； Silica ； Accelerating degradation ； Dynamic load

參考文獻

【14】紀宗成 高溫Nafion複合膜之老化診斷與加速老化測試 元智大學先進能源研究所 民國97年 碩士論文

【2】Cai, Y., et al., Effect of water transport in polymer membranes for PEMFC. Journal of Power Sources, 2000. 86(1-2):p. 197-201

【3】Lin, G. and T. Van Nguyen, Effect of Thickness and Hydrophobic Polymer Content of the Gas Diffusion Layer on Electrode Flooding Level in a PEMFC. Journal of The Electrochemical Society, 2005.152(10):p. A1942-A1948

【4】P. J. Ferreira, G. J. la O,, Y. Shao-Horn, D. Morgan, R. Makharia, S. Kocha, H. A. Gasteigerc, 2005, “Instability of Pt/C Electrocatalysts in Proton Exchange Membrane Fuel Cell”Journal of The Electrochemical, Soc. 152, p.2256-2271

【5】湯誌畯 質子交換膜燃料電池陰極觸媒層之最適化 元智大學化學工程與材料科學學系 民國93年 碩士論文