1. Nanoparticle-dispersed PEO polymer electrolytes for Li batteries
- Author
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Ahn, J.-H., Wang, G.X., Liu, H.K., and Dou, S.X.
- Subjects
- *
ELECTROLYTES , *CERAMIC powders , *LITHIUM cells - Abstract
Nanoparticle-dispersed polymer electrolytes have been prepared by stirring or high-energy ball milling of polyethylene oxide (PEO), lithium salt (LiCF3SO3, LiClO4 and LiPF6), and nanometer-size ceramic powder (TiO2, SiO2 and Al2O3). The smaller the size of ceramic particles, the better they influence the crystallization kinetics of the PEO polymer chains. High-energy ball milling lowers the glass transition temperature of the composite polymers, and thus increases the ionic conductivity greater than the order of the magnitude compared with the un-milled samples. The highest ionic conductivity was reported when using LiPF6 as added lithium salt and Al2O3 as dispersed particle. Cyclic voltametric measurements showed that the PEO-system is electrochemically stable in the range of 2–5 V. [Copyright &y& Elsevier]
- Published
- 2003
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