Effects of Lithium Doping on the Polymer Chain Dynamics in Siloxane/Poly(Ethylene Oxide) Ormolyte Nanocomposites: A 13C and 7Li Exchange Solid-State NMR Study

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• 作者：Andr&eacute ; L. B. S. Bathista ; Eduardo R. deAzevedo ; Antonio C. Bloise ; Karim Dahmouche ; Patrick Judeinstein ; Tito J. Bonagamba
• 刊名：Chemistry of Materials
• 出版年：2007
• 出版时间：April 3, 2007
• 年：2007
• 卷：19
• 期：7
• 页码：1780 - 1789
• 全文大小：440K
• 年卷期：v.19,no.7(April 3, 2007)
• ISSN：1520-5002

文摘

⁷Li and ¹³C solid-state NMR methods were used to study Li⁺-doped siloxane/poly(ethylene oxide)hybrid electrolyte materials, where the polymer chains are linked to the inorganic phase through covalentbonds. These methods were employed to analyze the effects of the interactions between the organic andinorganic (siloxane and lithium) phases on the polymer dynamics. The motion geometry of polymerchains was found to be very similar for Li⁺-doped and non-doped Ormolytes. However, a significanteffect of the Li⁺ doping on the non-exponentiality of the correlation time functions that describe thepolymer chain dynamics was observed, and a model that supports such behavior was proposed.