High temperature investigation of electrochemical lithium insertion into Li4Ti5O12

Isaac M Markus; Marco Prill; Siaufung Dang; Torsten Markus; Robert Spatschek; Lorenz Singheiser

doi:10.1039/c6cp05466h

High temperature investigation of electrochemical lithium insertion into Li₄Ti₅O₁₂

Phys Chem Chem Phys. 2016 Nov 23;18(46):31640-31644. doi: 10.1039/c6cp05466h.

Authors

Isaac M Markus¹, Marco Prill², Siaufung Dang², Torsten Markus³, Robert Spatschek², Lorenz Singheiser²

Affiliations

¹ University of California, Berkeley, Department of Material Science and Engineering, Berkeley, CA, USA. isaac.markus@berkeley.edu.
² Forschungzentrum Jülich, IEK-2, 52425 Jülich, Germany.
³ Mannheim University of Applied Science, 68163 Mannheim, Germany.

PMID: 27834979
DOI: 10.1039/c6cp05466h

Abstract

Li₄Ti₅O₁₂ was synthesized via a solid state reaction and lithiated at 400 °C in a custom built galvanostatic cell consisting of a molten LiCl-KCl electrolyte and Li-Al alloy wires as counter and reference electrodes. The material exhibits decreased rate capability at 400 °C compared to the room temperature behavior. Electrochemical lithiation at C/20 exhibits a discharge profile with both a sloping curve and flat plateau, which is indicative of a solid solution behavior before reaching a two phase region. This electrochemical behavior is shown to be correlated with reversible formation of the cubic Li₂TiO₃ phase.