Open AccessTransport of External Lithium Along Phase Boundary in LiF-Ti Nanocomposite Thin Films
Author(s) -
Hao Zheng,
Rui Wang,
Jieyun Zheng,
Jian Gao,
Hong Li
Publication year - 2016
Publication title -
acta chimica slovenica
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.289
H-Index - 46
eISSN - 1580-3155
pISSN - 1318-0207
DOI - 10.17344/acsi.2016.2346
Subject(s) - nanocomposite , lithium (medication) , materials science , thin film , phase (matter) , phase boundary , chemical engineering , nanotechnology , chemistry , organic chemistry , engineering , medicine , endocrinology
The electronic and ionic conductivity of the LiF-Ti nanocomposite films prepared by the co-sputtering have been investigated by the method of impedance spectrum (IS), current-voltage curves (IV) and isothermal transient ionic current (ITIC) measurements. It is found that the ionic conductivity of the obtained LiF-Ti nanocomposite film is very low. After electrochemical and chemical lithiation, ionic conductivities of the lithiated composite films are increased to be 10-3 and 10-4 S/cm separately. This phenomenon indicates that the phase boundary between LiF and Ti could be the ionic conducting channels for external lithium in the LiF-Ti nanocomposite. Our results suggest a new strategy to design ionic or mixed ionic conductor.