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Improvement in voltage, thermal, mechanical stability and ion transport properties in polymer‐clay nanocomposites
Author(s) -
Sharma A. L.,
Thakur Awalendra K.
Publication year - 2010
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.32677
Subject(s) - thermal stability , nanocomposite , materials science , electrolyte , polymer , ionic conductivity , montmorillonite , chemical engineering , dielectric spectroscopy , intercalation (chemistry) , polymer chemistry , electrode , composite material , chemistry , inorganic chemistry , electrochemistry , engineering
We report novel results on optimization of intercalated polymer‐clay nanocomposite endowed with desirable properties like, (i) very high ionic conductivity (∼ 10 −3 S cm −1 ) at room temperature, (ii) substantial improvement in voltage stability (∼ 5.6 V), mechanical stability (25 MPa), and thermal stability (250°C) (iii) t ion ∼ 99% and cation transport number ( t Li+ ) ∼ 67%: Intercalation of polymer salt (PAN) 8 LiCF 3 SO 3 complex into dodecylamine modified montmorillonite clay (DMMT) nanometric channels has been confirmed by X‐ray diffraction and Transmission electron microscopy analysis. Complex impedance spectroscopy suggests bulk electrical conduction in the high frequency region and electrode polarization effect at the low frequencies. The experimental value of conductivity, voltage, and mechanical stability is observed to be invariably higher in polymer nanocomposite film when compared with clay free polymer‐salt complex film. The same is true for cation transport. The optimized polymer film serves dual purpose of electrolyte and separator in energy storage devices. © 2010 Wiley Periodicals, Inc. J Appl Polym Sci, 2010