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Sodium ion dynamics in a sulfonate based ionomer system studied by 23Na solid-state nuclear magnetic resonance and impedance spectroscopy

Pope, Cameron R., Romanenko, Konstantin, MacFarlane, Douglas R., Forsyth, Maria and O'Dell, Luke 2015, Sodium ion dynamics in a sulfonate based ionomer system studied by 23Na solid-state nuclear magnetic resonance and impedance spectroscopy, Electrochimica acta, vol. 175, pp. 62-67, doi: 10.1016/j.electacta.2015.03.131.

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Title Sodium ion dynamics in a sulfonate based ionomer system studied by 23Na solid-state nuclear magnetic resonance and impedance spectroscopy
Author(s) Pope, Cameron R.
Romanenko, Konstantin
MacFarlane, Douglas R.
Forsyth, MariaORCID iD for Forsyth, Maria orcid.org/0000-0002-4273-8105
O'Dell, LukeORCID iD for O'Dell, Luke orcid.org/0000-0002-7760-5417
Journal name Electrochimica acta
Volume number 175
Start page 62
End page 67
Total pages 6
Publisher Elsevier
Place of publication Amsterdam, The Netherlands
Publication date 2015
ISSN 0013-4686
Keyword(s) Electrolyte
Ionic conductivity
Ionomers
Sodium
Solid-state NMR
Summary A poly(2-acrylamido-2-methyl-1-propane-sulphonate) (PAMPS) ionomer containing both sodium and quaternary ammonium cations functionalised with an ether group, has been characterised in terms of its thermal properties, ionic conductivity and sodium ion dynamics. The ether oxygen was incorporated to reduce the Na+ association with the anionic sulfonate groups tethered to the polymer backbone, thereby promoting ion dissociation and ultimately enhancing the ionic conductivity. This functionalised ammonium cation led to a significant reduction in the ionomer Tg compared to an analogue system without an ether group, resulting in an increase in ionic conductivity of approximately four orders of magnitude. The sodium ion dynamics were probed by 23Na solid-state NMR, which allowed the signals from the dissociated (mobile) and bound Na+ cations to be distinguished. This demonstrates the utility of 23Na solid-state NMR as a probe of sodium dynamics in ionomer systems.
Language eng
DOI 10.1016/j.electacta.2015.03.131
Field of Research 030304 Physical Chemistry of Materials
Socio Economic Objective 850602 Energy Storage (excl. Hydrogen)
HERDC Research category C1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Copyright notice ©2015, Elsevier
Persistent URL http://hdl.handle.net/10536/DRO/DU:30072595

Document type: Journal Article
Collection: Institute for Frontier Materials
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