觸媒層中添加NH4HCO3造孔劑對PBI高溫燃料電池性能影響

Influence of NH4HCO3 as a pore-forming agent in electrode on the performance of PBI-based high temperature PEMFCs

葉宗錡(Tsung-Chi Yeh)

指導教授 ： 林秀麗

元智大學/工程學院/化學工程與材料科學學系/碩士(2013年)

https://doi.org/10.6838/YZU.2013.00027

摘要

本論文製備觸媒層中添加不同量造孔劑-碳酸氫銨之電極，並評估其應用於聚苯並咪唑(PBI)高溫質子交換膜燃料電池的影響。製備完成之電極進行循環伏安法實驗、掃描式電子顯微鏡分析。此外，製備觸媒漿料中添加不同NH4HCO3含量之膜電極組並進行單電池測試，陰陽極 Pt loading分別為 0.5mg/cm2，陰陽極進料氣體分別是氧氣與氫氣，操作溫度160℃，比較單電池測試之i-V曲線。
循環伏安法(CV)實驗數據顯示，電極中NH4HCO3添加量越高具有較高Pt活性面積。單電池性能顯示，在[PBI]/[Pt-C+PBI]=10wt%之觸媒溶液下，以[NH4HCO3]/[Pt-C+ NH4HCO3+PBI]=82 wt%有較佳的單電池效能，但電池功率在活化8小時後會有衰退的現象。此外，研究燃料電池的陽/陰電極中使用造孔劑對電池效能的影響，而實驗結果發現造孔劑單獨使用在陽極上會得到較佳的電池效能，且電池活化8小時後沒有明顯效能衰退的現象。

關鍵字：聚苯並咪唑；造孔劑；碳酸氫銨；質子交換膜燃料電池

關鍵字

聚苯並咪唑 ； 造孔劑 ； 碳酸氫銨 ； 質子交換膜燃料電池

並列摘要

The main purpose of this research is focused on the effect of pore-forming agent, NH4HCO3, used in catalyst layer of electrodes on the performance of PBI-based high temperature PEMFCs. The prepared electrodes were characterized by cyclic voltammeter and SEM. In addition, the voltage-current density curves of MEA with various amount of NH4HCO3 were measured at 160℃ for 8 hours, using hydrogen / oxygen as inlet gases.
The cyclic voltammetry (CV) experiment showed a higher electrochemical surface area (ECSA) of Pt if adding more NH4HCO3 in an electrode catalyst slurry solution of Pt-C/PBI/NH4HCO3/DMAc. It is found that, while at [PBI] / [Pt-C + PBI] = 10wt% catalyst solution, a weight ratio of 82 wt% of NH4HCO3 / [Pt-C+ NH4HCO3+PBI] showed better performance of single cell. However, the performance as a single cell was decayed after the 8 hours. Furthermore, the effect of NH4HCO3 used in catalyst layers of the anode and cathode was investigated. The result showed the performance of NH4HCO3 used in anode is better than that of it used in cathode. There has no significant decay after 8 hours.

Keywords: PBI; Pore-forming agent; NH4HCO3; Proton exchange membrane fuel cell

並列關鍵字

PBI ； Pore-forming agent ； NH4HCO3 ； Proton exchange membrane fuel cell

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