Polymeric gel electrolytes, based on a blend of poly(methylmethacrylate)/poly(vinylidene fluoride) (PMMA/PVdF), ethylene carbonate/propylene carbonate (EC/PC) as plasticizer and lithium Perchlorate as electrolyte, have been studied as a function of the different polymeric ratios to obtain the best compromise between ionic conduction and mechanical properties of the systems involved. Ionic conductivity and the lithium self-diffusion coefficient were measured by the PFG-NMR method, which revealed a maximum of lithium mobility for the composition PMMA 60%-PVdF 40%. The Raman spectroscopic study revealed a change of the interaction between that of the lithium cations and the plasticizer molecules for different PMMA/PVdF ratios. Oscillatory rheological tests have shown better mechanical properties for the intermediate compositions of the blend. (c) 2006 Elsevier B.V. All rights reserved.
Investigation of ionic conduction and mechanical properties of PMMA-PVdF blend-based polymer electrolytes
2006
Abstract
Polymeric gel electrolytes, based on a blend of poly(methylmethacrylate)/poly(vinylidene fluoride) (PMMA/PVdF), ethylene carbonate/propylene carbonate (EC/PC) as plasticizer and lithium Perchlorate as electrolyte, have been studied as a function of the different polymeric ratios to obtain the best compromise between ionic conduction and mechanical properties of the systems involved. Ionic conductivity and the lithium self-diffusion coefficient were measured by the PFG-NMR method, which revealed a maximum of lithium mobility for the composition PMMA 60%-PVdF 40%. The Raman spectroscopic study revealed a change of the interaction between that of the lithium cations and the plasticizer molecules for different PMMA/PVdF ratios. Oscillatory rheological tests have shown better mechanical properties for the intermediate compositions of the blend. (c) 2006 Elsevier B.V. All rights reserved.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
