title: Cycling behaviour of Li/Li4Ti5O12 cells studied by electrochemical impedance spectroscopy.
abstract: We studied the behaviour of Li/Li(4)Ti(5)O(12) cells by electrochemical impedance spectroscopy to gain insight into the changes at the electrode/electrolyte interfaces during extensive cycling. A simple equivalent-circuit model is able to describe the impedance of the complete battery as a function of both state-of-charge and state-of-degradation. The formation of the solid-electrolyte interface and dendrite growth at the Li metal electrode have a strong influence on the impedance measurements although the battery performance is not significantly affected.
authors.affiliation: Institute of Nanotechnology, Karlsruhe Institute of Technology, Karlsruhe, Germany.
authors.forename: Nina
authors.initials: N
authors.lastname: Schweikert
authors.forename: Horst
authors.initials: H
authors.lastname: Hahn
authors.forename: Sylvio
authors.initials: S
authors.lastname: Indris