Cobalt Doped LiFePO4/C Composite Material for Li-ion Cathodes

O. CECH; J.E. THOMAS; A. VISINTIN; M. SEDLARIKOVA; J. VONDRAK; M.S. MORENO

ECS Transactions

The Electrochemical Society

Año: 2012 vol. 40 p. 93 - 98

1938-5862

High temperature solid state synthesis was used for preparation of LiFePO4/C composite material and cobalt doped LiFePO4 composite material. Glycine assisted combustion method was involved as a carbon coating procedure. It uses glycine as a carbon precursor for conductive coating and connecting of active material nanoparticles. Two different samples were prepared and investigated ? clear LiFePO4/C material and LiFePO4/C doped with 1% of cobalt. The aim of this work is to show how a supervalent ion of cobalt influences parameters of cathode material. Electrochemical characterization by galvanostatic cycling, electrochemical impedance spectroscopy and rate capability was made and physical characterization by SEM, TEM and X-ray diffraction was provided.