COBALT DOPED LiFePO4 / C COMPOSITE MATERIAL FOR Li-ion ANODES

O. CECH; J. E. THOMAS; D. J. CUSCUETA; A. VISINTIN; P. DVOřÁK; L. TRNKOVA; M. SEDLARIKOVA; J. VONDRAK

Brno

Congreso; 12th Advanced Batteries, Accumulators and Fuel Cells; 2011

ABAF2011

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 supervalent ions if cobalt influences parameters of cathode material. Electrochemical characterization by galvanostatic cycling, electrochemical impedance spectroscopy and rate capability was made and physical characterization by x-ray diffraction was provided.