Lithium environment in dilute poly(ethylene oxide)/lithium triflate polymer electrolyte from REDOR NMR spectroscopy

The Journal of Physical Chemistry. B
Jason R WickhamCharles V Rice

Abstract

The role of the lithium ion environment is of fundamental interest regarding transport and conductivity in lithium polymer electrolytes. X-ray crystallography has been used to characterize the lithium environment in completely crystalline poly(ethylene oxide) (PEO) electrolytes, but this approach cannot be used with dilute PEO electrolytes. Here, using solid-state NMR data collected with the rotational-echo double-resonance 13C[7Li] (REDOR) pulse sequence, we have been able to characterize the crystalline microdomains of a PEO-lithium triflate sample with an oxygen/lithium ratio of 20:1. Our data clearly demonstrates that the lithium crystalline microdomains are nearly identical to those of a completely crystalline 3:1 sample, for which the crystal structure is known.

References

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Aug 3, 2001·Nature·Z GadjourovaP G Bruce
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Dec 5, 2003·Journal of the American Chemical Society·Luis J SmithAlexander Wei
Jan 1, 1999·Journal of Physics. Condensed Matter : an Institute of Physics Journal·C RouxE Belorizky

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Citations

Feb 10, 2012·Macromolecular Rapid Communications·Laura Ramón-GimenezAnke Hoffmann
Sep 12, 2009·Chemistry : a European Journal·Daihua TangQinghua Fan
Feb 22, 2012·Progress in Nuclear Magnetic Resonance Spectroscopy·Gang Wu, Jianfeng Zhu

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