NMR Multi-Scale
Description of Ionic Conductivity Mechanisms Inside Polymer Electrolytes
Patrick
Judeinstein,a,*
Detlef Reichert,b Eduardo R. deAzevedo,c and
Tito J. Bonagambac
a
R.M.N. en Milieu Orienté, CNRS UMR 8074, Bâtiment 410,
Université Paris-Sud, 91405 Orsay – France. E-mail:
pjudeins@icmo.u-psud.fr
b
Department of
Physics, University of Halle, Friedemann-Bach-Platz 6, 06108 Halle - Germany
c
Instituto de Fisica de São Carlos, Universidade de São Paulo, Caixa Postal 369,
CEP 13560-970 São Carlos-SP - Brazil
Abstract
Solid Polymer Electrolytes are obtained by
dissolving an alkali metal salt inside poly(oxyethylene) based materials. The
properties of these materials are strongly related to the behavior of the
different active species : solvent (polymer), cation, and anion. In this paper,
we compare various NMR techniques capable of deciphering different aspects of
these new materials : the structure and dynamics of the polymer, the cations and
anions as well as the supramolecular interactions between these different
species. These data are very useful for understanding the conductivity
mechanisms inside various families of PEO-based materials (nanocomposites, block
oligomers and copolymers, and liquid crystals) developed by our group.
Key words: Solid Polymer Electrolytes, NMR, lithium battery, hibrid
materials, nanocomposites, liquid crystals, polymer structure, polymer dimamic