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Enhanced ionic conductivity in novel nanocomposite gel polymer electrolyte based on intercalation of PMMA into layered LiV3O8

Research paper by Madhuryya Deka, Ashok Kumar

Indexed on: 04 Feb '10Published on: 04 Feb '10Published in: Journal of Solid State Electrochemistry



Abstract

In the present work, a novel polymer electrolyte based on poly(methyl methacrylate) (PMMA)/layered lithium trivanadate (LiV3O8) nanocomposite has been investigated. X-ray diffraction (XRD) study shows that d-spacing is increased from 6.3 ± 0.1 Å to 12.8 ± 0.1 Å upon intercalation of the polymer into the layered LiV3O8. Room temperature ionic conductivity of the obtained nanocomposite gel polymer electrolyte is found to be superior to that of conventional PMMA-based gel polymer electrolyte. Enhancement in ionic conductivity of the nanocomposite gel electrolyte is attributed to the formation of a two-dimensional channel as a result of decreased interaction between Li+ and V3O8− layers as confirmed by FTIR. SEM results show aggregation of nanocomposite particles resulting from extension of some of the polymer chains from interlayer to the edge providing paths for Li+ ion transport. Interfacial stability of nanocomposite gel electrolyte is also found to be better than that of the conventional PMMA-based gel polymer electrolyte.