This title appears in the Scientific Report :
2019
High-Temperature Polymer Electrolyte Fuel Cells Based on Protic Ionic Liquid Electrolytes
High-Temperature Polymer Electrolyte Fuel Cells Based on Protic Ionic Liquid Electrolytes
High-Temperature Polymer Electrolyte Fuel Cells based on Protic Ionic Liquid ElectrolytesJosef Sanarov, Jürgen Giffin, Carsten KorteForschungszentrum Jülich GmbHWilhelm-Johnen-Straße, DE-52428 Jülich Tel.: +49-2461-85356j.sanarov@fz-juelich.deAbstractNafion®-based fuel cell systems show excellent pe...
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Personal Name(s): | Sanarov, Josef (Corresponding author) |
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Giffin, Jürgen / Korte, Carsten | |
Contributing Institute: |
Technoökonomische Systemanalyse; IEK-3 |
Imprint: |
2019
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Conference: | European Fuel Cell Forum 2019, Lucerne (Switzerland), 2019-07-02 - 2019-07-05 |
Document Type: |
Abstract |
Research Program: |
Fuel Cells |
Publikationsportal JuSER |
High-Temperature Polymer Electrolyte Fuel Cells based on Protic Ionic Liquid ElectrolytesJosef Sanarov, Jürgen Giffin, Carsten KorteForschungszentrum Jülich GmbHWilhelm-Johnen-Straße, DE-52428 Jülich Tel.: +49-2461-85356j.sanarov@fz-juelich.deAbstractNafion®-based fuel cell systems show excellent performance but struggle with temperatures above 100 °C due to water evaporation and, consequently, a loss in proton conductivity. The introduction of phosphoric acid-doped polybenzimidazole membranes (PA-PBI) enables operating temperatures of up to 200 °C, even under dry conditions. As was shown by Korte et al., phosphoric acid possesses one of the highest proton conductivities amongst mineral and organic acids [1]. Nonetheless, according to Kamat et al., PA-PBI systems show non-competitive power densities due to slow oxygen transport and catalyst poisoning [2].The use of protic ionic liquids (PIL) as a fuel cell electrolyte has several advantages, including: high proton conductivity under dry conditions, thermal and electrochemical stability, as well as fast HOR and ORR kinetics. Wippermann et al. stated that PILs generated from 2-methylaminoethansulfonic acid (N-Methyltaurine) are promising candidates because of the acidic [2-Sema] cation (pKA ~ 1) [3].In this work, we focus on the fabrication of PIL/polymer composite membranes. Immobilisation of the [2 Sema] based PILs with various anions is achieved by immersion doping or, alternatively, by means of a solvent casting method. The resulting membranes are sandwiched between the gas diffusion electrodes to obtain membrane electrode assemblies (MEA) with an active area of 18 cm2. Subsequently, single cells are electrochemically characterized and compared to commercially available HT-PEFC systems using PA-PBI membranes.[1] Korte et al. "Phosphoric acid and its interactions with polybenzimidazole-type polymers." High Temperature Polymer Electrolyte Membrane Fuel Cells. Springer, Cham, 2016. 169-194. [2] Kamat, A., et al. "Experimental investigations into phosphoric acid adsorption on platinum catalysts in a high temperature PEM Fuel cell." Fuel Cells 11.4 (2011): 511 517.[3] Wippermann et al. "In Situ Determination of the Water Content of Ionic Liquids." Journal of The Electrochemical Society 165.5 (2018): H263-H270. |