Abstract
Crosslinked polyetherurethane (PEU) copolymer networks consisting of the low molecular weight poly(ethylene oxide) (PEO) and poly(propylene oxide) (PPO) segments with an aliphatic diisocyanate were synthesized and complexed with a LiClO4 salt to form solid polymer electrolytes. The ionic conductivities of these samples were measured as a function of PEO composition at various temperatures. And a solid 7Li NMR relaxation technique was used as a means of understanding the local environments and dynamics of the lithium ions in the polymer electrolytes. The difference in spin-spin relaxation times (T2) between two spectral components enabled to their separation, and thus we could monitor the mobile Li+ ion concentration and its motion as a function of PEO composition and temperature.
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Kim, DW., Park, JK., Rhee, HW. et al. Ionic Conductivity and 7Li NMR Study of Solid Polymer Electrolytes Based on Polyetherurethane Copolymer Networks. Polym J 26, 993–1001 (1994). https://doi.org/10.1295/polymj.26.993
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DOI: https://doi.org/10.1295/polymj.26.993