Abstract
Factors affecting the softening temperature of polymer gel electrolytes (PGEs) made from poly(vinylidene fluoride) (PVDF) have been investigated. The melting temperature transition has been found to rise with increased polymer concentration and salt concentration but reduced by solvent dielectric constant. The solvent dielectric constant was reduced by mixing propylene carbonate (PC) with the non-solvent phenyl propanol (PhP). The use of lithium salt bis(oxalate)borate (LiBOB) in place of lithium tetrafluroborote (LiBF4) gives further enhancement to the softening temperature of PGEs. In all of those cases, there is an eventual trade-off between increased softening temperature and reduced ionic conductivity, in this fabricated gel electrolyte. Here, a variety of ways to tailor the properties of PGEs for different applications has been shown.
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Acknowledgements
The author wishes to thank Prof. I. M. Ward and Dr. A. M. Voice, Leeds University, UK, for their support of work and acknowledge the Engineering and Physical Sciences Research Council (EPSRC), UK, for the grant (EP/D056551/1). The author also wishes to thank CSIR-India, Govt. of India, for CSIR secondment leave to work at Leeds University, UK, and Dr. Toney M. Rajan for hel** in manuscript correction.
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Dikshit, A.K. Raising the softening temperature of poly(vinylidene fluoride) gel electrolytes. Ionics 24, 153–161 (2018). https://doi.org/10.1007/s11581-017-2195-6
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DOI: https://doi.org/10.1007/s11581-017-2195-6