TY - JOUR
T1 - Electrical, thermal and NMR investigation of composite solid electrolytes based on PEO, LiI and high surface area inorganic oxides
AU - Dai, Y.
AU - Wang, Y.
AU - Greenbaum, S. G.
AU - Bajue, S. A.
AU - Golodnitsky, D.
AU - Ardel, G.
AU - Strauss, E.
AU - Peled, E.
N1 - Funding Information:
The work at Tel Aviv University was carried out with financial support from the United States Air Force Office of Scientific Research and the Israel Ministry of Defense. The research at Hunter College was supported, in part, by a grant from the United States Army Research Office and a CUNY Collaborative Grant.
PY - 1998/4/30
Y1 - 1998/4/30
N2 - High salt concentration polymer composite electrolytes, containing poly(ethylene oxide) (PEO), LiI and nanoscale Al2O3 or MgO and, in some cases, ethylene carbonate (EC) and poly(methyl methacrylate) (PMMA), were investigate by electrical conductivity, differential scanning calorimetry (DSC) and both wide-line and high resolution solid state 7Li NMR. The high resolution NMR spectrum of a sample with a PEO:Li ratio of 3:2 is consistent with at least two Li environments, one solvated by the polymer and one in small ionic clusters. A correlation between the observed change in Li environment at elevated temperature and a sudden increase in conductivity is suggested. All results demonstrate that the conduction mechanism in concentrated composite electrolytes is significantly different than in more dilute polymer electrolytes, in which the ion transport process is associated with polymer segmental motion. (C) 1998 Published by Elsevier Science Ltd. All rights reserved.
AB - High salt concentration polymer composite electrolytes, containing poly(ethylene oxide) (PEO), LiI and nanoscale Al2O3 or MgO and, in some cases, ethylene carbonate (EC) and poly(methyl methacrylate) (PMMA), were investigate by electrical conductivity, differential scanning calorimetry (DSC) and both wide-line and high resolution solid state 7Li NMR. The high resolution NMR spectrum of a sample with a PEO:Li ratio of 3:2 is consistent with at least two Li environments, one solvated by the polymer and one in small ionic clusters. A correlation between the observed change in Li environment at elevated temperature and a sudden increase in conductivity is suggested. All results demonstrate that the conduction mechanism in concentrated composite electrolytes is significantly different than in more dilute polymer electrolytes, in which the ion transport process is associated with polymer segmental motion. (C) 1998 Published by Elsevier Science Ltd. All rights reserved.
UR - http://www.scopus.com/inward/record.url?scp=0032309451&partnerID=8YFLogxK
U2 - 10.1016/S0013-4686(97)10053-6
DO - 10.1016/S0013-4686(97)10053-6
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AN - SCOPUS:0032309451
SN - 0013-4686
VL - 43
SP - 1557
EP - 1561
JO - Electrochimica Acta
JF - Electrochimica Acta
IS - 10-11
ER -