| dc.description.abstract | The synthesis of Li4Ti5O12 and the study of electrode thickness effect on the
electrochemical performance of lithium ion batteries has been carried out.
Li4Ti5O12 powders were synthesized from raw materials LiOH.H2O and TiO2 via
powder metallurgy method. Electrode sheet was made by mixed Li4Ti5O12powders
with PVDF, AB and NN,DMAC solvents become sluury and coated into sheet on
the Cu foil with variations in the thickness of 50μm, 80μm, and 120 μm. The
electrode sheet was assembled into half-cell battery using a coin cell with metallic
lithium as reference electrode and LiFP6 as electrolyte. Characterization included
X-Ray Diffraction (XRD) to know crystal structure and phases, while
elctrochemical performances were conducted by Electrochemical Impedance
Spectroscop (EIS), Cyclic Voltammetry (CV) and Charge/Discharge (CD). XRD
test showed that there are two phases formed, namely Li4Ti5O12 with cubic
structure at 77.3% and rutile TiO2 with tetragonal crystal structure at 22.7%. EIS
test showed that the highest conductivity of anode sheet is 3.66 x 10-5 S/cm at a
thickness of 50 μm. While, CV results showed that thicker electrode sheet will
increase intercalation and de-intercalation. From CD test showed that the layer
thickness affects the value of the specific capacity, the thicker of electrode layer
will decreases the value of specific capacity. The best capacity of battery cells are
obtained in a layer thickness of 50 μm, with a charge capacity of 146.6 mAh/g and
the discharge capacity of 146.09 mAh/g. | en_US |
