کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1272341 | 1497591 | 2011 | 14 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Influence of properties of gas diffusion layers on the performance of polymer electrolyte-based unitized reversible fuel cells Influence of properties of gas diffusion layers on the performance of polymer electrolyte-based unitized reversible fuel cells](/preview/png/1272341.png)
Polymer electrolyte-based unitized reversible fuel cells (URFCs) combine the functionality of a fuel cell and an electrolyzer in a single device. In a URFC, titanium (Ti)-felt is used as a gas diffusion layer (GDL) of the oxygen electrode, whereas typical carbon paper is used as a GDL of the hydrogen electrode. Different samples of Ti-felt with different structural properties (porosity and fiber diameter) and PTFE content were prepared for use as GDLs of the oxygen electrode, and the relation between the properties of the GDL and the fuel cell performance was examined for both fuel cell and electrolysis operation modes. Experimental results showed that the cell with a Ti-felt GDL of 80 μm fiber diameter had the highest round-trip efficiency due to excellent fuel cell operation under relatively high-humidity conditions despite degradation in performance in the electrolysis mode.
Research highlights
► In a URFC, titanium (Ti)-felt is used as a GDL of the oxygen electrode.
► The electrolysis performance is not good with a larger fiber diameter Ti-felt GDL.
► The fuel cell performance is excellent with a larger fiber diameter Ti-felt GDL.
► The cell with Ti-felt GDL of large fiber diameter has the highest round-trip efficiency.
Journal: International Journal of Hydrogen Energy - Volume 36, Issue 2, January 2011, Pages 1740–1753