高溫型質子交換膜燃料電池之電極最佳化結構之發展及特性之研究

High temperature proton exchange membrane fuel cell electrodes to optimize the structure and characteristics of the development

曹至皓(Chi-Hao Chau)

指導教授 ： 鐘國濱

元智大學/工程學院/機械工程學系/碩士(2012年)

https://doi.org/10.6838/YZU.2012.00009

摘要

本論文採用AB-PBI膜材，以直接浸漬AB-PBI膜材於85wt%磷酸中，以在原有Pt / C電極中添加PTFE與造孔劑(NH4)2C2O4)作為調整參數；並調配AB-PBI、Pt/C、PTFE與造孔劑(NH4)2C2O4)作為觸媒漿料，製作觸媒層，完成自製膜電極組，並在探討電極中PTFE含量以及造孔劑所造成的孔隙對高溫型質子交換膜燃料電池電化學特性及電池性能的影響。
實驗結果顯示PTFE添加於重量百分比為五時對性能影響較小同時並老化速率較未添加PTFE明顯的慢、且活化亦較為明顯，當造孔劑((NH4)2C2O4)與白金碳比例為一比一時期性能有較明顯的提升。而以此條件的膜電極進行實驗，以GDE的做法，陰陽極觸媒層內成分AB-PBI 15wt%、Pt loading 0.75mg/cm2、PTFE 5wt%、((NH4)2C2O4) 59.6 mg。量測結果顯示陰陽極進料分別為氧氣與氫氣，操作電壓為0.6V溫度160℃，電流密度可達283 mA/cm2。且長時間放電放五十小時觀察性能衰退情況與不同觸媒醬料組成成分的I-V曲線、AC-Impedance和CV、以孔隙分布測定儀觀察孔徑大小。

關鍵字

高溫型質子交換膜

並列摘要

This paper uses AB-PBI membrane, to direct dipping AB-PBI membranes in 85wt% phosphoric acid to the original Pt / C electrodes in PTFE with pore-forming agent added ((NH4) 2C2O4) as the adjustment parameters; and deployment of AB-PBI, Pt / C, PTFE and pore-forming agent ((NH4) 2C2O4) as the catalyst slurry to produce catalyst layer to complete the home-made membrane electrode group, and explore the electrodes in PTFE content and the pore caused by the porosity of the high temperature proton exchange membrane fuel cell electrochemical properties and performance.
Experimental results show the 5wt% PTFE less impact on performance when the aging rate than the same time and not add significantly slower PTFE, and activation is also more obvious, when the pore-forming agent ((NH4) 2C2O4) and the ratio of platinum carbon as one to one is more than a period of significantly improved performance. And this condition of the membrane electrode experiments to GDE approach, anode and cathode catalyst layer composition AB-PBI 15wt%, Pt loading 0.75mg/cm2, PTFE 5wt%, ((NH4) 2C2O4) 59.6 mg. Measurement results show anode feed oxygen and hydrogen, respectively, the operating voltage of 0.6V temperature of 160 ℃, the current density of up to 283 mA/cm2. And put fifty hours long discharge observed performance degradation of components with different sauces catalyst IV curve, AC-Impedance and CV, to observe the pore distribution of pore size analyzer

並列關鍵字

High temperature proton exchange membrane fuel cell

參考文獻

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