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Enhancement of ion dynamics in PMMA-based gels with addition of TiO2 nano-particles

Josefina Adebahr (Institutionen för experimentell fysik) ; N Byrne ; M Forsyth ; D.R. MacFarlane ; Per Jacobsson (Institutionen för teknisk fysik)
Electrochimica Acta (0013-4686). Vol. 48 (2003), 14-16, p. 2099-2103.
[Artikel, refereegranskad vetenskaplig]

Solvent and ion dynamics in PMMA based gels have been investigated as a function of the loading of nanosized TiO2 particles. The gels have a molar ratio of 46.5:19:4.5:30 of ethylene carbonate (EC), propylene carbonate (PC), lithium perchlorate and PMMA, respectively. A series of samples with 0, 4, 6 and 8 wt.% TiO2 filler were investigated. The diffusion coefficients for the lithium ions and for the two solvents (EC and PC) were investigated by pfg-NMR. It was shown that the addition of filler to the gel electrolytes enhances the diffusion of the cations, while the diffusion of the solvents remains constant. Raman measurements show no significant changes in ion-ion interactions with the addition of fillers, while the ionic conductivity is seen to decrease. However, the sample with 8 wt.% TiO2 had a conductivity close to that of the unfilled sample.



Denna post skapades 2010-08-18. Senast ändrad 2017-10-09.
CPL Pubid: 124768

 

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Institutioner (Chalmers)

Institutionen för experimentell fysik (1900-2005)
Institutionen för teknisk fysik (1900-2015)

Ämnesområden

Teknisk fysik

Chalmers infrastruktur