More sustainable electricity generation in hot and dry fuel cells with a novel hybrid membrane of Nafion/nano-silica/hydroxyl ionic liquid

Li, Yan, Shi, Yan, Mehio, Nada, Tan, Mingsheng, Wang, Zhiyong, Hu, Xiaohong, Chen, George Z., Dai, Sheng and Jin, Xianbo (2016) More sustainable electricity generation in hot and dry fuel cells with a novel hybrid membrane of Nafion/nano-silica/hydroxyl ionic liquid. Applied Energy, 175 . pp. 451-458. ISSN 0306-2619

Full text not available from this repository.

Abstract

A new hybrid proton exchange membrane (PEM) has been prepared from hydroxyl functionalized imidazolium ionic liquid (IL-OH), Nafion and nano-SiO2. The IL-OH, with a hydroxyl group that acts as both a proton acceptor and donor, forms strong hydrogen bonds with both Nafion and nano-SiO2, resulting in an effective hydrogen bond network in the ternary membrane. Such an anhydrous hydrogen-bond network, which is unknown previously, endows the PEMs with higher proton conductivity, greater thermal stability and surprisingly a more robust mechanical performance than PEMs consisting of conventional ionic liquids. The resulting PEMs have a tensile strength that is more than twice as strong as recast Nafion and an anhydrous ionic conductivity of ∼55 mS cm−1 at temperatures above 160 °C, with a proton transfer number of ∼0.9. A laboratory assembled H2–O2 fuel cell employing this new PEM delivered a power density of 340 and 420 mW cm−2 at 160 and 180 °C, respectively.

Item Type: Article
RIS ID: https://nottingham-repository.worktribe.com/output/797764
Keywords: Proton exchange membranes; Hydroxyl ionic liquids; Hydrogen-bonds; Nafion; Intermediate-temperature fuel cells
Schools/Departments: University of Nottingham Ningbo China > Faculty of Science and Engineering > Division of Engineering
University of Nottingham, UK > Faculty of Engineering > Department of Chemical and Environmental Engineering
Identification Number: https://doi.org/10.1016/j.apenergy.2016.03.075
Depositing User: Eprints, Support
Date Deposited: 06 Jun 2016 13:16
Last Modified: 04 May 2020 17:58
URI: https://eprints.nottingham.ac.uk/id/eprint/33649

Actions (Archive Staff Only)

Edit View Edit View