Comparative Study of NCM and NCA Electrode Material for Capacity-Fade Using 1-D Modeling

Abstract

Today, Lithium-ion (Li-ion) batteries are one of the most emerging power sources for almost all modern consumer electronic products. LiNi0.8Co0.15Al0.05O2 (NCA) and LiNi0.3Co0.3Mn0.3O2 (NCM) are projected to be utilized in lithium-ion power batteries as two typical layered nickel-rich ternary cathode materials. Moreover, there is still a need for systematic study from an industrial aspect as to the advantages and drawbacks of these two nickel-rich materials. Hence, a comparative study of NCM and NCA electrode material for capacity-fade has been explored using a 1-D simulated model constructed in the multi-physics software. The capacity of a battery depends on the cell potential, discharge rate, state of charge (SoC), and state of health (SoH). Therefore, the comparison of these parameters and the cycle number of a battery is extremely important. During this comparative study of NCM and NCA electrode material, the capacity fade based on discharge rate, SoC, and SoH over cycle number of a battery has been reported.