Solid State Science and Technology, Vol. 17, No 1 (2009) 63-72

ISSN 0128-7389


Nor Hazlizaaini Basri and N.S. Mohamed

Centre for Foundation Studies in Science,

University of Malaya, 50603 Kuala Lumpur



The polymer electrolytes comprising the blend of polyvinylide fluoride-hexafluoropropylene and polyvinyl chloride as the host polymer and lithium perchlorate as the dopant were prepared by solution casting technique. The polymer blend film containing 35 wt.% LiClO4 exhibited the highest room temperature conductivity in the order of magnitude ~10-4 S cm-1. The conductivity and dielectric behavior of selected electrolytes systems were analyzed. The dielectric constant, εr and dielectric loss, εi increases with temperature in the low frequency region, but almost negligible in the high frequency region. This is due to electrode polarization effects. The real part, Mi and imaginary part, Mr electrical modulus show an increase at the high frequency end. The present of Mi peak in the plot Mi versus frequency indicates that the systems are ionic conductors. The phenomenon suggests a plurality of relaxation mechanism. The log conductivity versus 1000 reciprocal of temperature (log σ vs 1000/T) plots shows regression values close to unity, indicating that the plot obeys Arrhenius relationship. The frequency dependence of conductivity follows the universal power law variation, σ (ω) Aωs. The plot of pre-exponent s versus temperature suggests that the conduction mechanism in the system film can be described using a Small Polaron model (SP).



[1]. A.M. Stephan (2006). Review on gel polymer electrolytes for lithium batteries. European Polymer Journal 42, 21-42.

[2]. S. Ramesh, T. Winie and A.K. Arof (2007). Investigation of mechanical properties of polyvinylchloride-polyethylene oxide (PVC-PEO) based polymer electrolytes for lithium polymer cells. European Polymer Journal 43, 1963-1968.

[3]. R. Baskaran, S. Selvasekarapandian, N. Kuwata, Y. Kawamury and T. Hattori (2006). Conductivity and thermal studies of blend polyelectrolytes based on PVAc-PMMA state ionic. Solid State Ionic 177, 2679-2682.

[4]. R. Baskaran, S. Selvasekarapandan, G. Hirankumar and M.S. Bhuvaneswari (2004). Dielectric and conductivity relaxation in PVAc based polymer electrolytes. Ionics 10, 129-134.

[5]. S. Rajendran, M. Sivakumar and R. Subaderi (2004). Investigations on the effect of various plasticizers in PVA-PMMA solid polymer blend electrolytes. Materials Letters 58, 641-649.

[6]. S. Rajendran and P. Sivakumar (2008). An investigation of PVdF/PVC based blend electrolytes with EC/PC as plasticizers in lithium battery application. Physica B 403, 509-516.

[7]. S. Rajendran, P. Sivakumar and R.S. Babu (2007). Studies on the salt concentration of a PVdF-PVC based polymer blend electrolyte. Journal of Power Sources 164, 815-821.

[8]. S. Rajendran, M.R. Prabu and M.U. Rani (2008). Ionic conduction in poly (vinyl chloride)/poly (ethyl methacrylate)-based polymer blend electrolytes complexed with different lithium salts. Journal of Power Sources 180, 880-883.

[9]. Y.G. Lee and J.K. Park (2000). Electrochemical characteristics of polymer electrolytes based on P(VdF-co-HFP)/PMMA ionomer blend for PLiB. Journal of Power Sources 97-98, 616-620.

[10]. A. Subramania, N.T. K. Sundram and G.V. Kumar (2006). Structural and electrochemical properties of micro-porous polymer blend electrolytes based on PVdF-co-HFP-PAN for Li-ion battery application. Journal of Power Sources 153, 177- 182.

[11]. N.S. Choi, Y.G. Lee, J.K. Park and J.M. Ko (2001). Preparation and electrochemical characteristics of plasticizerd polymer electrolytes based upon a PVDF-co-HFP/PVAc blend. Electrochemica Acta 46, 1581-1586.

[12]. C. Lee, J.H. Kim and J.Y. Bae (2003). Polymer gel electrolytes prepared by thermal curing of Poly (vinylidene fluoride)-hexafluoropropene/poly(ethylene glycol)/propylene carbonate/lithium perclorate blends. Polymer 44, 7143-7155.

[13]. M.S. Michael and S.R.S. Prabaharan (2004). Rechargeable lithium battery employing a new ambient temperature hybrid polymer electrolyte based on PVK + PVdF-HFP (copolymer). Journal of Power Source 136, 408-415.

[14]. A.M. Stephan, K.S. Nahm, M.A. Kulandainathan, G. Ravi and J. Wilson (2006). Electrochemical studies on nanofiller incorporated poly (vinylidene fluoride-hexafluoropropylene) (PVdF-HFP) composite electrolytes for lithium batteries. Journal of Applied Electrochemistry 36, 1091-1097.

[15]. Y.J. Hwang, S.K. Jeong, K.S. Nahm and A.M. Stephan (2007). Review of gel-type polymer electrolytes for lithium-ion batteries. European Polymer Journal 43, 65-71.

[16]. P. Vikram and S. Ramamurthy (2006). A study on the blending effects of PVDF in the ionic transport mechanism of plasticized PVC-LiBF4 polymer electrolyte. Materials Letters 60, Issue 28, 3431-3436.