INVESTIGATION OF ELECTROCHEMICAL PERFORMANCE OF NCA BASED CATHODES USING THEORETICAL ANALYSIS

Abstract

In this thesis, the modeling and theoretical simulations of Lithium-ion battery has been performed, for the improvement of its electrochemical properties and performances. The cathode material chosen for the simulation is LiNi0.8Co0.15Al0.05O2 (NCA), along with graphitic LixC6 as anode material, and LiPF6 as liquid electrolyte. Initial simulation was carried out with variable thickness of cathode, and with charge discharge curve the optimized thickness was calculated. Thereafter, the discharge curve was plotted for 1st and 2000th cycle at three different cycle rate 0.5C, 1C, 1.5C for the optimized thickness, and potential drop due to SEI layer has also been calculated at these cycle rates. The results obtained from the simulations shows consistency with the data reported in the previous literatures and experimental works. Hence the thickness of NCA cathode has been optimized and can be chosen as per required application and need. The results obtained from all three simulations show consistency with the previously reported literature based on experimental work. Hence, the cathode material (NCA) thickness is optimized and chosen easily according to the application and need.