Lithium-ion batteries represent the overwhelming majority of the market. Because of their high energy density and long lifespan, they became the dominant solution. Currently, many different novels cell chemistries are under research for EVs. These lithium-ion cells undergo a variety of undesirable chemical and mechanical reactions inside the battery over a period of time that affect the different components of the cells, such as the anode, cathode (electrodes), electrolyte, separator, and current collectors, causing degradation of these parts and shrinking the performance. Hence It is important to understand battery degradation to manage both the performance of the systems and warranty liabilities. This project will focus on, characterization of LFP and NMC 18650 cells, to understand and compare degradation modes and mechanisms with respect to different electric parameters for fresh and cycle-ageing (long cycling at defined C rate) under environmental conditions. The cells will be characterized by using various nondestructive & destructive techniques such as EIS, Radiography, SEM-EDS & FTIR tests. In this project, a prominent focus is on understanding the degradation morphology and topography of LFP & NMC. Understanding the mechanism and modes of degradation to avoid thermal runaway and cell explosion will provide researchers and developers with useful data for EV applications