Jump to main content
Jump to site search

Issue 7, 2014
Previous Article Next Article

Carbon-coated LiCrTiO4 electrode material promoting phase transition to reduce asymmetric polarization for lithium-ion batteries

Author affiliations

Abstract

In this work, carbon-free and carbon-coated spinel LiCrTiO4 oxides were synthesized by a conventional solid state reaction. The lithium-ion diffusion coefficient and electronic conductivity of prepared electrode materials were systematically investigated using the galvanostatic intermittent titration technique (GITT), cyclic voltammetry (CV), and electrochemical impedance spectroscopy (EIS). The rate performances of the prepared materials were evaluated by galvanostatic charge–discharge. Carefully comparing the charge–discharge polarization potential of both materials, we unexpectedly discovered that the pristine LiCrTiO4 electrode demonstrated asymmetric polarization during the charging–discharging process, which is possibly attributed to the nonuniform electron conductivity between the endmember of a two-phase reaction, whereas carbon coating could level this phenomenon. Additionally, using an asymmetric core–shell model from the microscopic point of view can easily explain this common phenomenon. Meanwhile, this new research perspective can be extended to other active materials in lithium ion batteries.

Graphical abstract: Carbon-coated LiCrTiO4 electrode material promoting phase transition to reduce asymmetric polarization for lithium-ion batteries

Back to tab navigation

Publication details

The article was received on 17 Oct 2013, accepted on 19 Nov 2013 and first published on 19 Nov 2013


Article type: Paper
DOI: 10.1039/C3CP54399D
Phys. Chem. Chem. Phys., 2014,16, 2882-2891

  •   Request permissions

    Carbon-coated LiCrTiO4 electrode material promoting phase transition to reduce asymmetric polarization for lithium-ion batteries

    J. Yang, B. Yan, J. Ye, X. Li, Y. Liu and H. You, Phys. Chem. Chem. Phys., 2014, 16, 2882
    DOI: 10.1039/C3CP54399D

Search articles by author

Spotlight

Advertisements