為了降低高溫質子交換膜燃料電池(high temperature proton exchange membrane fuel cells, HT-PEMFC)中的觸媒擔載量及提高電流密度，本研究使用脈衝雷射沉積法(pulsed laser deposition, PLD)在氣體擴散層的微孔層表面沉積奈米顆粒堆疊觸媒層，並以滴塗(drop-casting)高分子填充劑修飾觸媒層，提升質子傳輸與氣體傳輸的能力，以降低電荷轉移阻抗。 本研究先針對觸媒層填充物種類進行研究，接著再針對聚苯並咪唑膜磷酸的流失進行探討，避免過高的磷酸摻雜導致溢出磷酸造成的酸淹，以及利用無裂紋碳紙限制磷酸滲出之特性，減少磷酸自質子交換膜中流失至MEA外。經優化後，滴塗50 nm摻雜磷酸之自含微孔高分子(PA:PIM-1)觸媒層填充物與未進行觸媒修飾之燃料電池相比，在140 oC、0.6 V的測試條件下，燃料電池電流密度可提高81%。;To reduce the catalyst loading and increase the current density of high-temperature proton exchange membrane fuel cell (HT-PEMFC), this study employs pulsed laser deposition (PLD) to deposit nanoparticle-stacked catalyst layers on the surface of the microporous layer. The catalyst layer is further modified with a polymer filler through drop-casting to decrease charge transfer resistance vis improved proton and gas transport capabilities. The research begins by studying the types of fillers for the catalyst layer. Subsequently, a detailed examination is conducted on the loss of phosphoric acid from the polybenzimidazole membrane to avoid acid flooding caused by excessive phosphoric acid ,and use crack-free carbon paper to restrict phosphoric acid leakage from the proton exchange membrane to exterior of MEA. Following optimization, the drop-casted 50 nm PA:PIM-1 as catalyst layer filler, compared to the unmodified catalyst layer, demonstrates a 81% increase in current density at 0.6 V and 140 °C.
