The single particle modelling is studied for the degradation and its effect on the cyclic performance of lithium-ion cell. Lithium-ion cell degradation is studied as a function of cycle number and parasitic reaction current density. It is shown that in lithium-ion batteries, capacity fade occurring as a result of the formation of solid electrolyte interphase on the negative carbon electrode occurs over a number of cycles due to the slow nature of this electrochemical process. Mathematical modeling is also carried out by single particle model and various degradation mechanisms to validate and study the various aspects of cell capacity deterioration.