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- W2010321775 abstract "This paper reports on the development of polymer electrolyte membranes (PEMs) based on sulfonated polysulfone for application in a DMFC mini-stack operating at room temperature in passive mode. The sulfonated polysulfone (SPSf) with two degrees of sulfonation (57 and 66%) was synthesized by a well-known sulfonation process. SPSf membranes with different thicknesses were prepared and investigated. These membranes were characterized in terms of methanol/water uptake, proton conductivity, and fuel cell performance in a DMFC single cell and mini-stack operating at room temperature. The study addressed (a) control of the synthesis of sulfonated polysulfone, (b) optimization of the assembling procedure, (c) a short lifetime investigation and (d) a comparison of DMFC performance in active-mode operation vs. passive-mode operation. The best passive DMFC performance was 220 mW (average cell power density of about 19 mW cm−2), obtained with a thin SPSf membrane (70 μm) at room temperature, whereas the performance of the same membrane-based DMFC in active mode was 38 mW cm−2. The conductivity of this membrane, SPSf (IEC = 1.34 mequiv. g−1) was 2.8 × 10−2 S cm−1. A preliminary short-term test (200 min) showed good stability during chrono-amperometry measurements." @default.
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- W2010321775 date "2010-12-01" @default.
- W2010321775 modified "2023-09-23" @default.
- W2010321775 title "Investigation of sulfonated polysulfone membranes as electrolyte in a passive-mode direct methanol fuel cell mini-stack" @default.
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- W2010321775 doi "https://doi.org/10.1016/j.jpowsour.2009.11.130" @default.
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