Decoupled ion conduction in poly(2-acrylamido-2-methyl-1-propane-sulfonic acid) homopolymers

Noor,SAM, Sun,J, Macfarlane,DR, Armand,M, Gunzelmann,D and Forsyth,M 2014, Decoupled ion conduction in poly(2-acrylamido-2-methyl-1-propane-sulfonic acid) homopolymers, Journal of materials chemistry a, vol. 2, no. 42, pp. 17934-17943, doi: 10.1039/c4ta03998j.

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Title Decoupled ion conduction in poly(2-acrylamido-2-methyl-1-propane-sulfonic acid) homopolymers
Author(s) Noor,SAM
Forsyth,MORCID iD for Forsyth,M
Journal name Journal of materials chemistry a
Volume number 2
Issue number 42
Start page 17934
End page 17943
Publisher Royal Society of Chemistry Publications
Place of publication Cambridge, England
Publication date 2014-11-14
ISSN 2050-7488
Keyword(s) Science & Technology
Physical Sciences
Chemistry, Physical
Energy & Fuels
Materials Science, Multidisciplinary
Materials Science
Summary As the focus on developing new polymer electrolytes continues to intensify in the area of alternative energy conversion and storage devices, the rational design of polyelectrolytes with high single ion transport rates has emerged as a primary strategy for enhancing device performance. Previously, we reported a series of sulfonate based copolymer ionomers based on using mixed bulky quaternary ammonium cations and sodium cations as the ionomer counterions. This led to improvements in the ionic conductivity and an apparent decoupling from the Tg of the ionomer. In this article, we have prepared a new series of ionomers based on the homopolymer of poly(2-acrylamido-2-methyl-1-propane-sulfonic acid) using differing sizes of the ammonium counter-cations. We observe a decreasing Tg with increasing the bulkiness of the quaternary ammonium cation, and an increasing degree of decoupling from Tg within these systems. Somewhat surprisingly, phase separation is observed in this homopolymer system, as evidenced from multiple impedance arcs, Raman mapping and SEM. The thermal properties, morphology and the effect of plasticizer on the transport properties in these ionomers are also presented. The addition of 10 wt% plasticizer increased the ionic conductivity between two and three orders of magnitudes leading to materials that may have applications in sodium based devices. This journal is
Language eng
DOI 10.1039/c4ta03998j
Field of Research 091205 Functional Materials
030604 Electrochemistry
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
Grant ID DP130101652
Copyright notice ©2014, Royal Society of Chemistry
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Document type: Journal Article
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