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Angew Chem Int Ed Engl. 2014 Apr 1;53(14):3631-5. doi: 10.1002/anie.201307423. Epub 2014 Mar 5.

Transferring lithium ions in nanochannels: a PEO/Li⁺ solid polymer electrolyte design.

Author information

1
Physics Department & Shanghai Key Laboratory of Magnetic Resonance, East China Normal University, North Zhongshan Road 3663, 200062 Shanghai (P. R. China).

Abstract

A new category of crystalline polymer electrolyte prepared by the supramolecular self-assembly of polyethylene oxide (PEO), α-cyclodextrin (α-CD), and LiAsF6 is reported. The polymer electrolyte consists of the nanochannels formed by α-CDs in which the PEO/Li(+) complexes are confined. The nanochannels formed by α-CD provide the pathway for the directional motion of Li(+) ions and at the same time prevent the access of the anions by size exclusion, resulting in good separation of the Li(+) ions and the anions. The conductivity of the reported material is 30 times higher than that of the comparable PEO/Li(+) complex crystal at room temperature. By using state-of-art solid-state NMR spectroscopy, the structure and dynamics of the material were investigated in detail. The dynamics of the Li(+) ions was studied and correlated to the ionic conductivity of the material.

KEYWORDS:

NMR spectroscopy; cyclodextrin; inclusion compounds; lithium ions; polymer electrolytes

PMID:
24596167
DOI:
10.1002/anie.201307423

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