Solid State Science and Technology, Vol. 17, No 1 (2009) 73-80
CHARACTERIZATION OF PROTON CONDUCTING PVDF-HFP/PEMA BLEND BASED SOLID ELECTROLYTES
Siti Rudhziah and N. S. Mohamed
Center for Foundation Studies in Science,
University of Malaya, 50603 Kuala Lumpur.
Proton conducting poly(vinylidene fluoride-cohexafluoropropylene)/polyethyl methacrylate (PVDF-HFP/PEMA) blend based electrolytes with different compositions of NH4CF3SO3 salt have been prepared and characterized. XRD and SEM studies show that the addition of NH4CF3SO3 helps to generate more amorphous region in the semicystalline PVDF-HFP/PEMA system. The conductivity of the blend based electrolyte system increases with increasing content of NH4CF3SO3. The system containing 40 wt % of salt exhibits the highest room temperature conductivity of 6.90 × 10-4 S cm-1. The temperature dependence of ionic conductivity of the system follows an Arrhenius behavior. The frequency dependence of conductivity of the system obeys the universal power law, σ(ω) Aω∝n. The pre-exponent, n is found to decrease with increasing temperature suggesting that the Correlated Barrier Hopping model can be used to explain the conduction mechanism in the system.
. A. Bozkurt and W. H. Meyer (2001). Proton conducting blends of poly(4-vinylimidazole) with phosphoric acid. Solid State Ionic, 138, 259-265.
. J. C. Lassegues, J. Grondin, M. Hernadez and B. Maree (2001). Proton conducting polymers blends and hybrids organic inorganic materials. Solid State Ionic, 145, 37-45.
. M. Hema, S. Selvasekerapandian, A. Sakunthala, D. Arunkumar and H. Nithya (2008). Sructural, vibrational and electrical characterization of PVA- NH4Br polymer electrolyte system. Physica B, 403, 2740-2747.
. A. M. M. Ali, N. S. Mohamed and A. K. Arof (1998). Polyethylene oxide (PEO) - ammonium sulfate ((NH4)2SO4) complexes and electrochemical cell performance. Journal of Power Sources, 74, 135-141.
. C. S.Ramya, S. Selvasekarapandian, T. Savitha, G. Hirankumar and P. C.
Angelo (2007). Vibrational and impedance spectroscopic study on PVP-NH4SCN based polymer electrolytes. Physica B, 393, 11-17.
. S. Rajendran, R. Subadevi and M. Nirmala (2004). Characterization of PVA-PVDF based solid polymer electrolytes. Physica B, 348, 73-78.
. A. Bhide and K. Hariharan (2007). Ionic transport studies on (PEO)6:NaPO3 polymer electrolyte plasticized with PEG 400. European Polymer Journal, 43, 4253-4270.
. C. S. Ramya, S. Selvasekarapandian, T. Savitha, G. Hirankumar, R. Baskaran, M. S. Bhuvaneswari and P. C. Angelo (2006). Conductivity and thermal behavior of proton conducting polumer electrolyte based on poly (N-vinyl pyrrolidone). European Polymer Journal, 42, 2672-2677.
. S. D. Druger, A. Itzan, and M. A. Ratner (1983). Dynamic bond percolation theory: A microscopic model for diffusion in dynamically disordered systems. I. Definition and one-dimensional case. Journal of Chemistry Physics, 79, 3133-3142.
. A. M. Abo El Ata, S. M. Attia and T. M. Meaz (2004). Ac conductivity and dielectric behavior of CoAlxFe2-xO4. Solid State Sciences, 6, 61-69.
. A. Ghosh (1990). Freqeuncy-dependent conductivity in bismuth-vanadate glassy semiconductor. Physical Review, B 41, 1479-1488.
. R. Ondo-Ndong, G. Ferblantier, F. Pascal-delannoy, A. Boyer and A. Fourcaran (2003). Electrical properties of Zinc Oxide sputtered thin films. Microelectronics Journal, 34, 1087-1092.
. A. R. Long (1982). Frequency-dependent loss in amorphous semiconductors. Advance in Physics, 31, 553-637.
. L. J. Meng, M. Andritschky and M. P. Dos Santos (1994). Zinc Oxide films prepared by dc reactive magnetron sputtering at different substrate temperatures. Vacuum, 45, 19-22.
. D. Deger and K. Ulutas (2004). Conduction and dielectric polarization in Se thin films. Vacuum, 72, 307-312.
. S. R. Elliot (1987). A.C. conduction in amorphous chalcogenide and pnictide semiconductors. Advanced Physics, 36, 135-218.
. P. Dutta, S. Biswas, M. Ghosh, S. K. De and S. Chatterjee (2001). The dc and ac conductivity of polyaniline–polyvinyl alcohol blends. Synthetic Metals, 122, 455-461.