lithium titanate

The influence of the composition, the thickness and the surface morphology of Li3V2(PO4)3 or Li4Ti5O12 based electrode composites with carbon nanomaterial and polyvinylidene fluoride on their electrochemical performance was examined. The thickness and the surface morphology of the electrodes were jointly controlled by rolling with different gaps and monitored using 3D laser microscopy and scanning electron microscopy.

An approach for constructing mathematical models of the current dependence of the capacity of electrode materials is proposed. The approach involves analyzing the probabilities of favorable and unfavorable events occurring on the elements of electrical equivalent circuits that can be used to model the electrode. Several probabilistic models that correspond to different combinations of a capacitor, a Warburg element and a constant phase element in an electrical circuit are proposed.

The study of new anode material based on Li₄Ti₅O₁₂ and conducting polymer binder have been performed with use of cyclic voltammetry method. It was shown, that modified composition of anode material has superior properties in comparison with standard composition with PVDF in term of higher specific capacity and kinetic of charge transfer properties. Using of PEDOT:PSS/CMC binder allow to increase of specific capacity up to 14%.