STUDY OF EVOLUTION OF THE STRUCTURE OF THE CATHODE MATERIAL LiNi0.8Co0.1Mn0.1O2 UNDER CONDITIONS OF CYCLING WITH RECHARGING USING IN-SITU X-RAY DIFFRACTION

This article presents a detailed analysis of the cathode material LiNi0.8Co0.1Mn0.1O2 (NCM⁸¹¹) using continuous in-situ X-ray diffractometry during cell cycling in the voltage range from 2.7 V to 4.8 V, which led to its recharge. The changes in the crystal structure of the material during charging and discharging are investigated. The decrease in capacitance caused by degradation is shown, and the dependence of the parameters of the unit cell of the material on the voltage applied during cycling is revealed. The analysis of the causes of irreversible structural changes in the cathode material that occur during intercalation and deintercalation of lithium ions is carried out. The results obtained open up the possibility of developing effective methods to reduce degradation factors by understanding the mechanisms of material destruction.