Thermal-Electrochemical Modeling and Analysis of Different Cathode-Anode pairs for Lithium-ion Battery

Abstract

This article represents a computational approach for the estimation of the characteristics of lithium-ion batteries for a 2D electrochemical model of cylindrical type lithium-ion battery using COMSOL software. Various input parameters used in the model formulation have been obtained from experimental data as well as published work. For the evaluation of battery performance, an electrochemical-thermal mathematical model has been designed to determine the electrochemical parameters such as rate capability, charge/discharge characteristic, ragone curve. Further, the electrochemical characteristics have been characterized with the help of cyclic voltammetry (CV) test which indicates the uniform electrochemical reactivity and transport properties of the designed battery. Two types of electrode pairs in which LiMn2O4 as cathode materials form LiMn2O4 (LMO)/Graphite and LMO/Carbon (MCMB) are designed and these electrode pairs are simulated and evaluated to determine the characteristics of battery material using charge and discharge curve at different current loads (C-rates) as well as ragone curve. The simulation results validate the electrochemical behavior of the proposed 2D model. Also, the LMO/graphite electrode pair shows better discharging and charging capacity, high energy, and power curve as compared to the LMO/Carbon (MCMB) electrode pair.

Keywords

• anode
• batteries
• cathode
• electrochemical
• electrodes