Preparation and electrical conductivity of polyethers/WS2 layered nanocomposites

Utilizing the solvothermal synthesis technique, lithium intercalated tungsten disulfide LixWS2 with x > 1 was obtained, which was allowed to react with water to the formation of single-molecule-layer suspension of tungsten disulfide. The layered nanocomposites PEG, PEO/WS2, intercalating poly(eth...

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Bibliographic Details
Published in:Electrochimica acta 2007-02, Vol.52 (9), p.3028-3034
Main Authors: XU, Bai-Huan, LIN, Bi-Zhou, SUN, Dong-Ya, CONG DING
Format: Article
Language:English
Subjects:
Applied sciences
Composites
Exact sciences and technology
Forms of application and semi-finished materials
Polymer industry, paints, wood
Technology of polymers
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Summary:Utilizing the solvothermal synthesis technique, lithium intercalated tungsten disulfide LixWS2 with x > 1 was obtained, which was allowed to react with water to the formation of single-molecule-layer suspension of tungsten disulfide. The layered nanocomposites PEG, PEO/WS2, intercalating poly(ethylene glycol) (PEG, MW ~1 x 103, 6 x 103, 1 x 104) and poly(ethylene oxide) (PEO, MW 3 x 105) into the tungsten disulfide host galleries, were prepared using the improved exfoliation-adsorption technique. It was revealed that the intercalated polymers within the host galleries are in a double-layer arrangement with an interlayer expansion of about 9 A. Despite high conductivity of the host material, those of the PEG, PEO/WS2 nanocomposites were found to be high in the order of 1 x 10-2 to 10-3 S cm-1 at ambient temperature, resulted from the guest-host charge transfers.
ISSN:0013-4686
1873-3859
DOI:10.1016/j.electacta.2006.09.046