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Compositional effect of PVdF-PEMA blend gel polymer electrolytes for lithium polymer batteries |
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| Authors: | M Sivakumar H-C Wu |
| Institution: | a Department of Physics, Alagappa University, Karaikudi 630 003, India b Materials and Chemical Research Laboratories, Industrial Technology Research Institute (ITRI), Chutung, Hsinchu 310, Taiwan, ROC c Department of Chemical Engineering, National Taiwan University, Taipei 106, Taiwan, ROC |
| Abstract: | Owing to their improved mechanical properties and good polymer miscibility, the blend gel polymer electrolytes of poly (vinylidene fluoride) (PVdF)-poly(ethyl methacrylate) (PEMA) have been prepared using solvent casting technique and characterized for their electrochemical performances. The electrolyte shows a maximum ionic conductivity of 1.5 × 10−4 S cm−1 at 301 K for the 90:10 blend ratio of PVdF:PEMA system with good transport property. The ionic conductivity is enhanced, in accompany with improved microstructural homogeneity, at low PEMA contents, while the decreased conductivity at high contents has been attributed to increasing crystalline PEMA domains. With the optimum PVdF:PEMA ratio, the complex system was found to facile reasonable ionic transference number and exhibit superior interfacial stability with Li electrode. |
| Keywords: | PVdF PEMA Gel polymer electrolyte Electrochemical characterization |
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