Simple fabrication of 12 μm thin nanocomposite fuel cell membranes by direct electrospinning and printing

JOURNAL OF POWER SOURCES

卷:337

Article

Breitwieser, Matthias^1,2  Klose, Carolin¹  Klingele, Matthias¹  Hartmann, Armin¹  Erben, Johannes¹  Cho, Hyeongrae⁴  Kerres, Jochen^4,5  Zengerle, Roland^1,2  Thiele, Simon^1,2,3 

[1] Univ Freiburg, IMTEK Dept Microsyst Engn, Lab MEMS Applicat, Georges Koehler Allee 103, D-79110 Freiburg, Germany

[2] Hahn Schickard, Wilhelm Schickard Str 10, D-78052 Villingen Schwenningen, Germany

[3] Univ Freiburg, FIT, Georges Koehler Allee 105, D-79110 Freiburg, Germany

[4] Univ Stuttgart, Inst Chem Proc Engn, D-70199 Stuttgart, Germany

[5] North West Univ, Fac Nat Sci, Focus Area Chem Resource Beneficiat, ZA-2520 Potchefstroom, South Africa

关键词: Direct membrane deposition;    Composite membrane;    Electrospinning;    PEMFC;    Inkjet-printing;   

DOI  :  10.1016/j.jpowsour.2016.10.094

来源: Elsevier

【 摘 要 】

Direct membrane deposition (DMD) was recently introduced as a novel polymer electrolyte membrane fabrication method. Here, this approach is extended to fabricate 12 mu m thin nanocomposite fuel cell membranes. Poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP) nanofibers are directly electrospun onto gas diffusion electrodes. By inkjet-printing Nafion ionomer dispersion into the pore space of PVDF-HFP nanofiber mats, composite membranes of 12 mu m thickness were fabricated. At 120 degrees C and 35% relative humidity, stoichiometric 1.5/2.5 H2/air flow and atmospheric pressure, the power density of the DMD fuel cell (0.19 W cm-2), was about 1.7 times higher than that of the reference fuel cell (0.11 W cm-2) with Nafion HP membrane and identical catalyst. A lower ionic resistance and, especially at 120 degrees C, a reduced charge transfer resistance is found compared to the Nafion HP membrane. A 100 h accelerated stress test revealed a voltage decay of below 0.8 mV h-1, which is in the range of literature values for significantly thicker reinforced membranes. Finally, this novel fabrication approach enables new degrees of freedom in the design of complex composite membranes. The presented combination of scalable deposition techniques has the potential to simplify and thus reduce cost of composite membrane fabrication at a larger scale. (C) 2016 Elsevier B.V. All rights reserved.

【 授权许可】

Free