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Journal of Materials Science

, Volume 43, Issue 13, pp 4607–4617 | Cite as

Electrical conductivity enhancement of a polymer using butyl glycidyl ether (BGE)–lithium hexafluorophosphate (LiPF6) complex

  • Soumen Jana
  • Wei-Hong ZhongEmail author
Article

Abstract

In this study, we investigated the improvement in electrical conductivity of a polymer with the addition of dissolved lithium hexafluorophosphate (LiPF6) in an ether based solvent, butyl glycidyl ether (BGE). Thin film samples were fabricated by adding LiPF6 (up to 1 wt%) to poly (methyl-methacrylate) (PMMA). Film with 0.75% LiPF6 showed the highest improvement of electrical conductivity by three orders of magnitude. Both FTIR spectra and X-ray diffraction studies confirmed the formation of BGE–LiPF6 complex. Differential Scanning Calorimetry was used to characterize the PMMA/LiPF6 specimens further. Dielectric experiments revealed the existence of multiple composition dependent relaxation processes: β (high frequency) and β (low frequency) relaxation processes. The results suggest that electrical conductivity could be improved without influencing the domain polymer and the composite materials, including their processability. This work suggests that the conductivity of nanocomposites with various solid conductive fillers may be sufficiently enhanced in combination with this ion conduction approach involving a “liquid conductive filler.” Since BGE is compatible with epoxy molecules, further study is expected to lead to an effective solution to conductive epoxy composites in their wide field of applications including aircraft and multifunctional energy sources such as structural batteries.

Keywords

Differential Scanning Calorimetry PMMA LiPF6 Lithium Salt Alkali Metal Salt 

Notes

Acknowledgements

The authors are very grateful to Mr. Russell G. Maguire of the Boeing Company for fruitful discussions on this work. The authors gratefully acknowledge the support from NSF through NIRT grant 0506531. This work is also partially supported by NASA through grant NNM04AA62G.

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Copyright information

© Springer Science+Business Media, LLC 2008

Authors and Affiliations

  1. 1.School of Mechanical and Materials EngineeringWashington State UniversityPullmanUSA

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