本文關鍵詞：超聲噴涂法制備PEMFC膜電極研究　出處：《稀有金屬》2017年06期 　論文類型：期刊論文

  更多相關文章： 超聲噴涂 膜電極 質子交換膜燃料電池 催化劑利用率

【摘要】：介紹了超聲噴涂技術在制備質子交換膜燃料電池(PEMFC)膜電極中的應用。對噴涂數(shù)據(jù)的分析表明,超聲噴涂技術噴涂重復性和穩(wěn)定性好,漿料利用率高。對膜電極進行形貌分析,顯示膜電極表面均勻且顆粒分散性良好,微孔層(MPL)和催化層(CL)呈立體孔隙結構,有利于減少傳輸電阻,形成有效的三相反應區(qū)。保持陰極鉑載量為0.55 mg·cm~(-2),陽極降載量實驗表明,在極低陽極鉑載量下,膜電極仍具有良好的性能。在50℃,無外加濕,氫空測試條件下,陽極鉑載量為0.05 mg·cm~(-2)時,最高功率密度為370 m W·cm~(-2),而單位陽極鉑質量的比功率達7.39 W·mg~(-1),催化劑利用率高。氫閉端400 m A·cm~(-2)長時放電實驗表明,0.05 mg·cm~(-2)膜電極仍然表現(xiàn)出與0.30 mg·cm~(-2)膜電極相當?shù)男阅�。實驗表明進一步降低膜電極鉑載量是可行的。
[Abstract]:The application of ultrasonic spraying technology in the preparation of PEMFC membrane electrode for proton exchange membrane fuel cell (PEMFC) is introduced. The analysis of spraying data shows that ultrasonic spraying technology has good reproducibility and stability. The morphology analysis of the membrane electrode shows that the surface of the membrane electrode is uniform and the particle dispersity is good. The microporous layer MPLand the catalytic layer CL) are three-dimensional pore structure, which is helpful to reduce the transfer resistance. An effective three-phase reaction zone was formed, and the cathodic platinum load was kept at 0.55 mg 路cm-1 ~ (-2). The membrane electrode still has good performance. At 50 鈩，

本文編號：1424554