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- W3023935714 abstract "Nanofiber composite membrane (NFCM) shows great potential for utilization as proton exchange membrane due to the ultrahigh in-plane proton conduction ability, but impeded by the inferior through-plane conductivity, i.e., serious conduction anisotropy. Herein, hybrid sulfonated poly(ether ether ketone) (SPEEK) nanofiber was fabricated for the first time by uniformly filling 2–5 nm quantum dots (QDs). Then, chitosan was incorporated into the pores of fiber mat for the preparation of hybrid nanofiber composite membrane (HNFCM). The filled QDs can provide a large number of proton-conducting groups (–NH–/–NH2 and –CO2H). Especially, the –NH–/–NH2 groups form ordered acid-base pairs with the –SO3H groups in SPEEK, providing low-barrier pathways for proton hopping through the nanofiber. In this way, the HNFCM displays significantly enhanced both through-plane and in-plane proton conduction, decreased transfer anisotropy, and thereby boosted hydrogen fuel cell performance. Particularly, the through-plane conductivity as high as 456 mS cm−1 is achieved by this HNFCM at 90 °C and 100% RH, which is almost 3 times of that of relevant NFCM without QDs. This then brings one time increase in cell power density. And the influence of functional group loading in QDs on membrane performance is also explored." @default.
- W3023935714 created "2020-05-13" @default.
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- W3023935714 date "2020-08-01" @default.
- W3023935714 modified "2023-10-13" @default.
- W3023935714 title "Nanofiber composite membrane using quantum dot hybridized SPEEK nanofiber for efficient through-plane proton conduction" @default.
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- W3023935714 doi "https://doi.org/10.1016/j.memsci.2020.118198" @default.
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