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• W2045346763 abstract "Abstract A novel polymer composite electrolyte consisting of quaternized polyvinyl alcohol (Q-PVA) and quaternized chitosan nano-particles (Q-chitosan) is synthesized for use in a direct alcohol alkaline fuel cell (DAAFC). The quaternization efficiencies of PVA and chitosan particles are 2.6% and 39%, respectively. Incorporation of 5% Q-chitosan nano-particles into the Q-PVA matrix results not only in an increased ion-exchange capacity but also a decreased polymer crystallinity and higher free volume hole density, which significantly enhance ion conduction. The shrunk polymer free volume size suppresses methanol permeability in the Q-PVA/Q-chitosan composite. In addition, the resulting nano-composite exhibited an inhibited in-plane swelling ratio without sacrificing the alkali uptake level. The KOH-doped Q-PVA/Q-chitosan was resistant to the Fenton reagent. In DAAFCs, a maximum power density of 73 mW cm –2 is achieved using the Q-PVA/5%Q-chitosan electrolyte when fed with 2 M methanol at 60 °C or 59 mW cm –2 with 3 M ethanol at 60 °C. The resulting maximum power densities are higher than most literature data. The alkaline fuel cell demonstrated stable long-term power output for at least 230 h. This result confirms that the Q-PVA/Q-chitosan electrolyte exhibits great potential for future commercialization." @default.
• W2045346763 created "2016-06-24" @default.
• W2045346763 creator A5042786677 @default.
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• W2045346763 date "2015-07-01" @default.
• W2045346763 modified "2023-10-18" @default.
• W2045346763 title "Novel quaternized polyvinyl alcohol/quaternized chitosan nano-composite as an effective hydroxide-conducting electrolyte" @default.
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• W2045346763 doi "https://doi.org/10.1016/j.memsci.2015.02.043" @default.
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