# Effect of porosity on PVdF-co-HFP-PMMA-based electrolyte

Sundaram, Kalyana NT and Musthafa, Muhammed OT and Lokesh, KS and Subramania, A (2008) Effect of porosity on PVdF-co-HFP-PMMA-based electrolyte. In: Materials Chemistry and Physics, 110 (1). pp. 11-16. (In Press)

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## Abstract

A novel MPPBEM based on PVdF-co-HFP–PMMA was prepared with a preferential polymer dissolution process. The $N_2$ gas adsorption/desorption and SEM analysis were used to reveal the porous structure of the polymer matrix and attain the maximum pore size in the range of 251 nm. AC-impedance spectroscopy measurement was carried out to investigate the ionic conductivity of MPPBEMs and achieved a maximum ionic conductivity of $10.23 \times 10^{-3} S cm^{-1}$ at room temperature. The lithium transference numbers of MPPBEMs were measured using the DC-polarization method coupled withAC-impedance spectra are found to be above 0.639. Finally, the electrode/electrolyte interfacial resistance was evaluated by monitoring the impedance response at different time intervals.

Item Type: Journal Article Copyright of this article belongs to Elsevier B.V. Li-ion battery;Porous polymer electrolyte;Ionic conductivity Division of Chemical Sciences > Inorganic & Physical Chemistry 29 Jul 2008 19 Sep 2010 04:43 http://eprints.iisc.ernet.in/id/eprint/13519