Электрохимические конденсаторы

Using literature information about the temperature effect on the electrochemical behavior of electrodes based on LiFePO₄ and Li₄Ti₅O₁₂ being positive and negative electrodes of a lithium­ion battery, the discharge characteristics of batteries with such electrodes and various ratios of the amount of active material on the electrodes in the temperature range from ?15 to +60°C were calculated.

Various features of creation of the lithium­-fluorocarbon power sources were considered. The electrochemical characteristics of the electrodes, which were manufactured using various compositions of fluorocarbon and silver vanadate, were studied. It was found that the electrodes based on the mass ratio CF_x : SVO 82.5 : 7.5 show the best properties. The composite electrodes have significant advantages in discharge potential, capacity and stability compared with the fluorocarbon ones.

The electrochemical properties of C/MnO₂ composite materials in 1 M sodium sulfate solution were investigated using the methods of cyclic voltammetry, galvanostatic charge-discharge and impedance spectroscopy. It was shown that the capacitive characteristics of the electrodes depend on the nature and the method of obtaining manganese oxide nanoparticles. It was established that the material containing manganese oxide obtained using isoamyl alcohol as a reducing agent has high electrochemical characteristics.