Hostname: page-component-586b7cd67f-dlnhk Total loading time: 0 Render date: 2024-12-03T07:06:55.258Z Has data issue: false hasContentIssue false
  • English
  • Français

Nature of the Chemical Bonds in Polymer-Salt Complexes: Raman and IR Studies

Published online by Cambridge University Press:  21 February 2011

Gholamabbas Nazri  and
Donald M. MacArthur
Gholamabbas Nazri
Affiliation:
Physical Chemistry Department, GM Research Laboratories Warren, MI 48090and Ricardo Aroca Department of Chemistry and Biochemistry, University of Windsor, Windsor, Ontario, Canada NOB 3P4
Donald M. MacArthur
Affiliation:
Physical Chemistry Department, GM Research Laboratories Warren, MI 48090and Ricardo Aroca Department of Chemistry and Biochemistry, University of Windsor, Windsor, Ontario, Canada NOB 3P4
Get access

Abstract

Polymer electrolytes are attracting interest because of potential use in ‘solid state’ batteries and electrochromic windows. In this work the nature of the chemical bonds and ion association in polymer-salt complexes were studied. The fundamental vibrational frequencies of LiClO4− were calculated using valence force constants which are obtained from the ClO4− anion. The calculated frequencies and the band assignments agree quite well with the observed frequencies. Raman and IR spectroscopy were used to investigate the interaction of Li+ and ClO4− with the PEO chains. Lithium ion interacted with the negatively charged oxygen of PEO and C104 interacted electro- statically with the positively charged hydrogens. The strong electrostatic interactions induced changes in the intensity of the Raman bands and IR absorption bands of the polymer. The Raman and IR spectra of the polymer-salt complexes clearly show the existence of ‘free’ ions, ionpairs and salt clusters at various concentrations of the lithium salt. The maximum concentration of “free” ions deduced from the spectroscopy is in excellent agreement with the salt concentration required to obtain maximum ionic conductivity.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 175: Symposium S – Multifunctional Materials , 1989 , 61
Copyright
Copyright © Materials Research Society 1990

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

1. Scrosati, B., Selvaggi, A., Croce, F. and Gang, W., J. Power Sources, 24, 287, (1988).Google Scholar
2. Tunstall, D. P., Tomlin, A. S., MacCallum, J. R. and Vincent, C. A., J. Pbvs. C: Solid State Physics. 21. 1039 (1988).Google Scholar
3. Papke, B. L., Ratner, M. A. and Shriver, D. F., J. Electrochem. Soc., 129, 1694 (1982).Google Scholar
4. Weston, J. E. and Steel, B. C. H., Solid State Ionics, 7, 75 (1982).Google Scholar
5. Lontsov, V. V., Kazanskii, K. S. and Shupik, N., Doklady Akademii Nauk, 285, 142 (1985).Google Scholar
6. Watanabe, M., Tadano, K., Sanui, K. and Ogata, N., Chemistry Letters, 1239, (1987).Google Scholar
7. Watanabe, M., Itoh, M., Sanui, K. and Ogata, N., Macromolecules, 20, 569 (1087).Google Scholar
8. Licheri, G., in “X-ray Diffraction of Ions in Aqueous Solutions, Hydration and Complex Formation”, (Ed. Magini, M.) CRC Press Inc. 1988.Google Scholar
9. Hughes, K. and Isard, J. O., in Physics of Electrolytes, Vol.1, p. 347 (Ed. Hladik, J.), 1972.Google Scholar
10. Angell, A. C., J. Chem. Phys. Solids (1989) in press. and A. C. Angell and W. Sichina, Ann. N. Y. Acad. Sci. 279, 53, 1976.Google Scholar
11. Aroca, R. and Cook, P., Amm. Lab., 16, 122 (1984).Google Scholar
12. Francisco, J. S. and Williams, I. H., Chem. Phys., 114, 339 (1987).Google Scholar
13. Francisco, J. S. and Williams, I. H., Chem. Phys. 120, 389 (1987).Google Scholar
14. Ross, S. D., Spectrochim. Acta., 18, 225 (1962).Google Scholar
15. Tadokoro, H., Chatani, Y., Yoshihara, T., Tahara, S. and Murahashi, S., J. Polymer Sci., 48, 109 (1964).Google Scholar