Nanoparticle enhanced conductivity in organic ionic plastic crystals : space charge versus strain induced defect mechanism

Shekibi, Youssof, Gray-Weale, Angus, MacFarlane, Douglas R., Hill, Anita J. and Forsyth, Maria 2007, Nanoparticle enhanced conductivity in organic ionic plastic crystals : space charge versus strain induced defect mechanism, Journal of physical chemistry Part C : nanomaterials and interfaces, vol. 111, no. 30, pp. 11463-11468.

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Title Nanoparticle enhanced conductivity in organic ionic plastic crystals : space charge versus strain induced defect mechanism
Author(s) Shekibi, Youssof
Gray-Weale, Angus
MacFarlane, Douglas R.
Hill, Anita J.
Forsyth, Maria
Journal name Journal of physical chemistry Part C : nanomaterials and interfaces
Volume number 111
Issue number 30
Start page 11463
End page 11468
Publisher American Chemical Society
Place of publication Washington, D.C.
Publication date 2007-08-02
ISSN 1932-7447
1932-7455
Summary High conductivity in solid-state electrolytes is a critical requirement for many advanced energy and other electrochemical applications. Plastic crystalline materials have shown promise in this regard, and the inclusion of nanosized inorganic particles in both amorphous and crystalline materials has indicated order of magnitude enhancements in ion transport induced by space charge or other defect enhancement. In this paper we present conductivity enhancements in the plastic crystal N,N‘-ethylmethylpyrrolidinium bis(trifluoromethanesulfonyl)amide ([C2mpyr][NTf2]) induced by nanosized SiO2 particles. The addition of the nanoparticles dramatically increases plasticity and ion mobility. Positron annihilation lifetime spectroscopy (PALS) measurements indicate an increase in mean defect size and defect concentration as a result of nanoparticle inclusion. The scaling of the conductivity with size suggests that a “trivial space charge” effect is operable, although a strain induced enhancement of defects (in particular extended defects) is also likely given the observed increase in plasticity.
Language eng
Field of Research 039999 Chemical Sciences not elsewhere classified
Socio Economic Objective 970103 Expanding Knowledge in the Chemical Sciences
HERDC Research category C1.1 Refereed article in a scholarly journal
Copyright notice ©2007, American Chemical Society
Persistent URL http://hdl.handle.net/10536/DRO/DU:30030253

Document type: Journal Article
Collection: Institute for Technology Research and Innovation
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