Istanbul Gelisim Vocational School: Vocational School Bulletin (Vol. 3, Issue 3, March 2023)

Abstract

Structure and Thermal Characterization ofLithium-Ion Batteries

LA lithium-ion battery typically consists of a negative anode, a positive terminal cathode, an electrolyte, a separator, a current collector, and an enclosure. The electrodes in lithium-ion batteries are the main component in determining the battery capacity amount and energy density amount. In the case of a lithium-ion battery, charging and discharging occurs by the movement of lithium ions between the positive and negative terminals. Lithium-ion battery cells are prismatic and cylindrical. The cathode material of the battery is produced in different structures. The structures of cathode materials can be examined in three groups. These are layered structures, cubic structures and olivine structures. The preferred lithium-composite materials in the cathode structure are lithium iron phosphate (LiFePO), lithium nickelate (LiNiO2), lithium manganate (LiMn2O), lithium cobaltate (LiCoO2) and lithium nickelmanganese oxide (LiNiO2). The nickel element has the highest concentration of active content among the cobalt and manganese elements used in the cathode electrode. Therefore, the capacity of a lithiumion battery increases as the density of the element nickel increases. Lithium cobalt oxide (LiCoO) as spinels2) and lithium manganese oxide (LiM2O4) and layered oxides such as LiMPO4 as olivines are common cathode materials used.