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Structure and conductivity of radiation grafted poly (vinylidene fluoride)/polystyrene based gel polymer electrolytes

Mahmoud Nasef, Mohamed and Saidi, Hamdani (2004) Structure and conductivity of radiation grafted poly (vinylidene fluoride)/polystyrene based gel polymer electrolytes. In: The XXI Regional Conference and Workshop on Solid State Science & Technology 2004, 12-13 Oktober 2004, Hyatt Regency Kinabalu, Sabah, Malaysia.

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Abstract

The structural behaviour of new gel polymer electrolytes prepared by radiation-induced grafting of styrene onto poly(vinylidene flouride) PVDF film and subsequent impregnation with LiPH6/EC/DEC liquid electrolyte was investigated. The composition of the obtained polymer electrolytess was characterized by Fourier transform infrared spectroscopy (FTIR). Differential scanning calorimetry (DSC) and x-ray diffraction (XRD) were used to examine the structure at various contents of grafted polystyrene. The polymer electrolytes were found to have reduced crystalline structures compared to the virgin PVDF matrix and such reduction stem from the accumulative effect of dilution with amorphous grafted polystyrene and partial disruption caused by subsequent activation with the liquid electrolyte. The obtained polymer electrolytes achieved a superior ionic conductivity (1.61x10(-3)S/cm) at room temperature when 50% polystyrene content was achieved. It was suggested that the lithium ion conducting films are heterogenous,phase separated gel elctrolytes with at least three-phase structures: an un-swollen crystalline domain, a plasticized and swollen amporphous phase host the major part of the liquid elctrolyte, and a small volume of electrolyte-filed channels. The thermal stability of the polymer electrolyte was also investigated using thermal gravimetrical analysis (TGA) as a function of polystyrene content.

Item Type:Conference or Workshop Item (Paper)
Uncontrolled Keywords:Gel polymer electrolytes, polystyrene, poly (vinylidene fluoride), PVDF film
Subjects:T Technology > T Technology (General)
Divisions:Chemical and Natural Resources Engineering (Formerly known)
ID Code:6148
Deposited By: Norhani Jusoh
Deposited On:09 Sep 2008 10:19
Last Modified:01 Jun 2010 15:39

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