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Ionic conductivity in poly (L‐leucine)1,3‐diamino propane–lithium iodide solid polymer electrolyte
Author(s) -
Kaus N. H.,
Lahazan N.,
Ahmad A. H.
Publication year - 2009
Publication title -
polymers for advanced technologies
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.61
H-Index - 90
eISSN - 1099-1581
pISSN - 1042-7147
DOI - 10.1002/pat.1246
Subject(s) - ionic conductivity , conductivity , materials science , lithium (medication) , lithium iodide , propane , electrolyte , polymer , dielectric spectroscopy , iodide , ionic bonding , inorganic chemistry , analytical chemistry (journal) , ion , chemistry , organic chemistry , electrochemistry , medicine , electrode , composite material , endocrinology
The pelletized Poly(L‐Leucine)‐1,3‐diamino propane–lithium iodide (LiI) samples have been prepared by using a low temperature sintering method. Results from impedance spectroscopy have proven this mixture to be a superionic material with maximum conductivity obtained in the range of 10 −3 S/cm for the samples containing 50 wt% LiI. The high ionic conductivity achieved was due to the increased number of charge carrier from LiI. Improved conductivity could also be due to hopping of lithium ion through the side chain of polymer. Infrared spectroscopy showed that both LiI and poly amino acid may co‐exist together. From the spectra it is revealed that the CO band at 1643 cm −1 shifted to higher wave number indicating that chelation of Li + may have occurred at oxygen atom. Results from X‐ray diffraction show that the prepared samples were partially crystalline in nature. Some of the peaks have disappeared and this confirmed that some complexation has occurred within the sample. Copyright © 2009 John Wiley & Sons, Ltd.