Characterisation of ion transport in sulfonate based ionomer systems containing lithium and quaternary ammonium cations
Data(s) |
01/01/2015
|
---|---|
Resumo |
Two sulfonated ionomers based on poly(triethylmethyl ammonium 2-acrylamido-2-methyl-1-propane sulfonic acid) (PAMPS) and containing mixtures of Li<sup>+</sup> and quaternary ammonium cations are characterised. The first system contains Li<sup>+</sup> and the methyltriethyl ammonium cation (N<inf>1222</inf>) in a 1:9 molar ratio, and the <sup>7</sup>Li NMR line widths showed that the Li<sup>+</sup> ions are mobile in this system below the glass transition temperature (105°C) and are therefore decoupled from the polymer segmental motion. The conductivity in this system was measured as 10<sup>-5</sup> Scm<sup>-1</sup> at 130°C. A second PAMPS system containing Li<sup>+</sup> and the dimethylbutylmethoxyethyl ammonium cation (N<inf>114(2O1)</inf>) in a 2:8 molar ratio showed much lower conductivities despite a significantly lower T<inf>g</inf> (60°C), possibly due to associations between the Li<sup>+</sup> and the ether group on the ammonium cation, or between the latter cations and the sulfonate groups. |
Identificador | |
Idioma(s) |
eng |
Publicador |
Elsevier |
Relação |
http://dro.deakin.edu.au/eserv/DU:30072632/oza-characterisationofion-2015.pdf http://www.dx.doi.org/10.1016/j.electacta.2015.03.218 |
Direitos |
2015, Elsevier |
Palavras-Chave | #Conductivity #Electrolytes #Ionomers #NMR #Polymers |
Tipo |
Journal Article |