Lithium ion conducting PVA:PVdF polymer electrolytes doped with nano SiO2 and TiO2 filler |
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| Affiliation: | 1. Departamento de Química - Universidade Federal de Minas Gerais. Av. Antônio Carlos, 6627-Pampulha, CEP 31270-901, Belo Horizonte - MG, Brazil;2. Centro Federal de Educação Tecnológica de Minas Gerais-Campus IV-Araxá. Av. Ministro Olavo Drummond, 25 - Bairro São Geraldo, CEP 38180-510, Araxá - MG, Brazil;1. International Research Centre, Kalasalingam University, Krishnankoil, 626126, Tamilnadu, India;2. School of Energy Sciences, Madurai Kamaraj University, Madurai, Tamilnadu, India |
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| Abstract: | The effect of nano SiO2 and TiO2 fillers on the thermal, mechanical and electrochemical properties of PVA:PVdF:LiCF3SO3 have been investigated by three optimized systems of SPE (80PVA:20PVdF:15LiCF3SO3), CPE-I (SPE:8SiO2) and CPE-II (SPE:4TiO2). From the TGA curve least weight loss has been observed for CPE-II indicating high thermal stability compared to other systems. Stress–strain curve of the prepared samples confirm the enhancement of tensile strength in CPE-II compared to CPE-I and SPE. Conductivity studies show that addition of TiO2 filler slightly enhances ionic conductivity 3.7×10−3 S cm−1 compared to filler free system at 303 K. Dielectric plots have been analyzed and CPE-II possesses higher dielectric constant compared to CPE-I and filler free system. Temperature dependence of modulus plots has been studied for highest conductivity possessing sample. Wider electrochemical stability has been obtained for nano-composite polymer electrolytes. The results conclude that the prepared CPE-II shows the best performance and it will be well suited for lithium ion batteries. |
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| Keywords: | Polymers Electrical properties Thermogravimetric analysis (TGA) |
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