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- W1972809155 abstract "A series of novel segmented block copolymers of sulphonated polybenzimidazole (PBI) (s-PBI) and p-PBI were prepared with various polymer ratios (10–90 mol% s-PBI; 90-10 mol% p-PBI). A two-step synthesis of oligomeric species, followed by combination and further polymerisation was used via the polyphosphoric acid (PPA) process. The membranes showed improved high-temperature proton conductivities and fuel cell performance over previous literature reports, with moderate incorporation of s-PBI into the copolymer showing the best results. The non-humidified fuel cell performance was extensively studied with various fuels and oxidants and showed excellent properties. Block copolymers that incorporated 40, 50 or 60 mol% s-PBI and the corresponding 60, 50 or 40 mol% p-PBI, at 0.2 A cm–2 and 160 °C, had hydrogen–air performances of 0.661–0.666 V, depending on composition. The performance was improved using hydrogen–oxygen, with voltages between 0.734 and 0.742 V at 0.2 A cm–2 and 160 °C. Fuel cells operating on a reformed hydrocarbon gas showed decreased performance (0.622–0.627 V, same conditions), especially at lower temperatures, but was significantly improved over previous literature reports of sulphonated PBI membranes operating at high temperatures." @default.
- W1972809155 created "2016-06-24" @default.
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- W1972809155 date "2011-03-23" @default.
- W1972809155 modified "2023-09-23" @default.
- W1972809155 title "Synthesis and Properties of Segmented Block Copolymers of Functionalised Polybenzimidazoles for High-Temperature PEM Fuel Cells" @default.
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- W1972809155 doi "https://doi.org/10.1002/fuce.201000085" @default.
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