Structural design of discharge of electrochemical cell of current with cathode based MgF2

It was shown that the design of discharge curve lithium-ion batteries of cyclic type with the cathode based on magnesium fluoride MgF2 could be carried out taking into consideration the empirical relations, describing the discharge of lead and nickel-cadmium batteries. The most suitable analytical pattern of the analyzed in the work could be considered Shepherd relation. The structural model of electrochemical cell could be presented in the form of four components, each of which describes a certain stage in the formation of the discharge curve. The change of the shape of the discharge curve is determined by polarizing element that is responsible for the slope of the linear part, and by the relaxation component that is responsible for the non-linear nature of the initial position of the charge curve. The falling of maximum value of accumulated charge with the increase of current density is connected with a decrease of the depth of penetration of the electrochemical process inside the cathodic material. Presence of relaxation component in the structural model indicates the existence of an electrochemical reaction, which runs simultaneously with the main charge generating reaction during the discharge of the cell. This electrochemical reaction is responsible for the appearance of the initial non-linear position of the discharge curve