интеркаляция лития

The effect of electrolyte humidity on charge-discharge behavior of electrodes from graphite, thin-film amorphous silicon and thin-film composites ``silicon–carbon'' is estimated. Rise of humidity from 50 to 400 ppm is shown to accelerating capacity fade of graphite electrode by order of the magnitude. Electrode with 0.2 μm amorphous silicon film keeps the cyclability in electrolytes with water content up to 3000 ppm however its capacity diminishes upon humidity increase.

With the aid of chronopotentiometry, voltammetry, and potentiostatic closure, the electrochemical characteristics of lithium intercalation to polyacrylonitrile carbon fiber was determined, namely, the capacitance, kinetic currents, lithium diffusion coefficient, autocharge currents. The study was made at 298 К in 1 M solutions of LiClO₄ in some mixed organic solvents (propylene carbonate – dimethoxyethane 7:3, propylene carbonate – diethyl carbonate 3:1).

A modern state of developments of lithium-ion batteries, as well as their main problems and the directions of their advancing are reviewed.