TY - JOUR
T1 - Lithium-7 NMR studies of concentrated LiI/PEO-based solid electrolytes
AU - Dai, Y.
AU - Greenbaum, S.
AU - Golodnitsky, D.
AU - Ardel, G.
AU - Strauss, E.
AU - Peled, E.
AU - Rosenberg, Yu
N1 - Funding Information:
The work at Hunter College was supported by grants from the US Office of Naval Research, the Department of Energy, the National Aeronautics and Space Administration (through the NASA-JOVE Program) and the PSC-CUNY Faculty Research Program. The research group of Tel Aviv University would like to express their gratitude for financial support from the US Air Force Office of Scientific Research and from the Israel Ministry of Defense.
PY - 1998/2/1
Y1 - 1998/2/1
N2 - E. Peled. Highly concentrated polymer electrolytes based on poly(ethylene oxide) (PEO) and LiI, with EO/Li ratio ≤ 3, were investigated by differential scanning calorimetry (DSC), powder X-ray diffraction (XRD) and 7Li solid state nuclear magnetic resonance (NMR) methods. The effect of 15-nm particle size Al2O3 additives and in several cases, other constituents ethylene carbonate and poly(methylmethacrylate) on structure and Li+ ion environment was explored. The addition of Al2O3 suppresses the formation of crystalline phases, including free LiI, which is present in EO/Li= 1.5 samples without Al2O3. The conductivity jump observed in these concentrated electrolytes at around 80°C is correlated with an NMR-observed transition to a Li+ environment which is similar to that of free ions in a molten phase.
AB - E. Peled. Highly concentrated polymer electrolytes based on poly(ethylene oxide) (PEO) and LiI, with EO/Li ratio ≤ 3, were investigated by differential scanning calorimetry (DSC), powder X-ray diffraction (XRD) and 7Li solid state nuclear magnetic resonance (NMR) methods. The effect of 15-nm particle size Al2O3 additives and in several cases, other constituents ethylene carbonate and poly(methylmethacrylate) on structure and Li+ ion environment was explored. The addition of Al2O3 suppresses the formation of crystalline phases, including free LiI, which is present in EO/Li= 1.5 samples without Al2O3. The conductivity jump observed in these concentrated electrolytes at around 80°C is correlated with an NMR-observed transition to a Li+ environment which is similar to that of free ions in a molten phase.
KW - Lithium iodide
KW - Lithium-7 NMR
KW - Nano-crystalline alumina
KW - Poly(ethylene oxide)
KW - Polymer electrolytes
UR - http://www.scopus.com/inward/record.url?scp=0032003659&partnerID=8YFLogxK
U2 - 10.1016/s0167-2738(97)00488-8
DO - 10.1016/s0167-2738(97)00488-8
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AN - SCOPUS:0032003659
SN - 0167-2738
VL - 106
SP - 25
EP - 32
JO - Solid State Ionics
JF - Solid State Ionics
IS - 1-2
ER -