超声喷涂法制备PEMFC膜电极研究

发布时间：2018-01-14 17:19

  本文关键词：超声喷涂法制备PEMFC膜电极研究　出处：《稀有金属》2017年06期 　论文类型：期刊论文

  更多相关文章： 超声喷涂 膜电极 质子交换膜燃料电池 催化剂利用率

【摘要】：介绍了超声喷涂技术在制备质子交换膜燃料电池(PEMFC)膜电极中的应用。对喷涂数据的分析表明,超声喷涂技术喷涂重复性和稳定性好,浆料利用率高。对膜电极进行形貌分析,显示膜电极表面均匀且颗粒分散性良好,微孔层(MPL)和催化层(CL)呈立体孔隙结构,有利于减少传输电阻,形成有效的三相反应区。保持阴极铂载量为0.55 mg·cm~(-2),阳极降载量实验表明,在极低阳极铂载量下,膜电极仍具有良好的性能。在50℃,无外加湿,氢空测试条件下,阳极铂载量为0.05 mg·cm~(-2)时,最高功率密度为370 m W·cm~(-2),而单位阳极铂质量的比功率达7.39 W·mg~(-1),催化剂利用率高。氢闭端400 m A·cm~(-2)长时放电实验表明,0.05 mg·cm~(-2)膜电极仍然表现出与0.30 mg·cm~(-2)膜电极相当的性能。实验表明进一步降低膜电极铂载量是可行的。
[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，

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