کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6481446 | 1398876 | 2016 | 8 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Chromium interlayer amorphous carbon film for 304 stainless steel bipolar plate of proton exchange membrane fuel cell Chromium interlayer amorphous carbon film for 304 stainless steel bipolar plate of proton exchange membrane fuel cell](/preview/png/6481446.png)
- Cr/a-C film was prepared for 304SS bipolar plate of PEMFC.
- The corrosion resistance and current conductivity are greatly improved.
- The assembled Cr/a-C 304SS PEMFC shows better performance and stability.
Excellent electrical conductivity and corrosion resistance make the graphite-like carbon film an ideal surface modification for metal bipolar plates, but the pinhole inside amorphous carbon (a-C) causes pitting corrosion of the substrate. Chromium interlayer amorphous carbon (Cr/a-C) was prepared for 304SS bipolar plate. The interlock structure between the Cr interlayer and a-C film prevented corrosive liquid from reaching the substrate. The Cr/a-C film was prepared on 304SS by direct current magnetron sputtering. The hydrophobic property, interfacial contact resistance (ICR), and corrosion resistance of Cr/a-C 304SS were investigated and compared with those of bare 304SS and a-C 304SS. In addition, the performance and stability of the assembled single fuel cell were analyzed. Results show that the contact angle with water of Cr/a-C 304SS is 89.5°. The ICR of Cr/a-C 304SS under compaction force of 150 N/cm2 is 16.65 mΩ cm2, which is better than that of a-C 304SS. The SEM and TEM results reveal the interlock structure between the Cr interlayer and a-C film. This structure results in excellent corrosion resistance, corrosion potential of â 0.32 V, and corrosion current density of 0.894 μA cmâ 2 in the simulated proton exchange membrane fuel cell (PEMFC). Single cell tests show that the peak power density of Cr/a-C 304SS PEMFC is 1.123 W cmâ 2, with no observed degradation during 12 h lifetime tests. Thus, the Cr/a-C film is an ideal protective layer for 304SS bipolar plates of PEMFC.
Journal: Surface and Coatings Technology - Volume 307, Part A, 15 December 2016, Pages 374-381