Nanoparticle Enhanced Conductivity in Organic Ionic Plastic Crystals: Space Charge versus Strain Induced Defect Mechanism

Autor:	Angus Gray-Weale, Anita J. Hill, Maria Forsyth, Youssof Shekibi, Douglas R. MacFarlane
Rok vydání:	2007
Předmět:	Chemistry Nanoparticle Ionic bonding Electrolyte Conductivity Space charge Surfaces Coatings and Films Electronic Optical and Magnetic Materials Ion Amorphous solid General Energy Chemical physics Plastic crystal Physical and Theoretical Chemistry
Zdroj:	Monash University
ISSN:	1932-7455 1932-7447
DOI:	10.1021/jp071631j
Popis:	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 parti...
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9f5821cda935bdac59588f358ac22bc7 https://doi.org/10.1021/jp071631j Zobrazit plný text záznamu