發(fā)布時(shí)間：2018-01-14 17:19

  本文關(guān)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(guān)文章： 超聲噴涂 膜電極 質(zhì)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(shù)在制備質(zhì)子交換膜燃料電池(PEMFC)膜電極中的應(yīng)用。對(duì)噴涂數(shù)據(jù)的分析表明,超聲噴涂技術(shù)噴涂重復(fù)性和穩(wěn)定性好,漿料利用率高。對(duì)膜電極進(jìn)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(jié)構(gòu),有利于減少傳輸電阻,形成有效的三相反應(yīng)區(qū)。保持陰極鉑載量為0.55 mg·cm~(-2),陽(yáng)極降載量實(shí)驗(yàn)表明,在極低陽(yáng)極鉑載量下,膜電極仍具有良好的性能。在50℃,無(wú)外加濕,氫空測(cè)試條件下,陽(yáng)極鉑載量為0.05 mg·cm~(-2)時(shí),最高功率密度為370 m W·cm~(-2),而單位陽(yáng)極鉑質(zhì)量的比功率達(dá)7.39 W·mg~(-1),催化劑利用率高。氫閉端400 m A·cm~(-2)長(zhǎng)時(shí)放電實(shí)驗(yàn)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(dāng)?shù)男阅�。�?shí)驗(yàn)表明進(jìn)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(hào)：1424554