Electrospun sulfonated poly(ether ketone) nanofibers as proton conductive reinforcement for durable Nafion composite membranes

Klose C, Breitwieser M, Vierrath S, Klingele M, Cho H, Buchler A, Kerres J, Thiele S (2017)

Publication Type: Journal article

Publication year: 2017

Journal

Journal of Power Sources Elsevier

Book Volume: 361

Pages Range: 237-242

DOI: 10.1016/j.jpowsour.2017.06.080

Abstract

We show that the combination of direct membrane deposition with proton conductive nanofiber reinforcement yields highly durable and high power density fuel cells. Sulfonated poly(ether ketone) (SPEK) was directly electrospun onto gas diffusion electrodes and then filled with Nafion by inkjet-printing resulting in a 12 μm thin membrane. The ionic membrane resistance (30 mΩ*cm2) was well below that of a directly deposited membrane reinforced with chemically inert (PVDF-HFP) nanofibers (47 mΩ*cm2) of comparable thickness. The power density of the fuel cell with SPEK reinforced membrane (2.04 W/cm2) is 30% higher than that of the PVDF-HFP reinforced reference sample (1.57 W/cm2). During humidity cycling and open circuit voltage (OCV) hold, the SPEK reinforced Nafion membrane showed no measurable degradation in terms of H2 crossover current density, thus fulfilling the target of 2 mA/cm2 of the DOE after degradation. The chemical accelerated stress test (100 h OCV hold at 90 °C, 30% RH, H2/air, 50/50 kPa) revealed a degradation rate of about 0.8 mV/h for the fuel cell with SPEK reinforced membrane, compared to 1.0 mV/h for the PVDF-HFP reinforced membrane.

Authors with CRIS profile

Simon Thiele

Involved external institutions

Albert-Ludwigs-Universität Freiburg DE Germany (DE) Universität Stuttgart DE Germany (DE) Fraunhofer-Institut für Solare Energiesysteme (ISE) / Fraunhofer Institute for Solar Energy Systems DE Germany (DE)

How to cite

APA:

Klose, C., Breitwieser, M., Vierrath, S., Klingele, M., Cho, H., Buchler, A.,... Thiele, S. (2017). Electrospun sulfonated poly(ether ketone) nanofibers as proton conductive reinforcement for durable Nafion composite membranes. Journal of Power Sources, 361, 237-242. https://doi.org/10.1016/j.jpowsour.2017.06.080

MLA:

Klose, Carolin, et al. "Electrospun sulfonated poly(ether ketone) nanofibers as proton conductive reinforcement for durable Nafion composite membranes." Journal of Power Sources 361 (2017): 237-242.

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