Reasons for the Degradation of Electrodes Based on Layered Transition Metal Oxide LiNi0.8Co0.15Al0.05O2

Abstract Galvanostatic cycling and electrochemical impedance spectroscopy are used to study reasons for the capacity fading when cycling electrodes based on LiNi0.8Co0.15Al0.05O2. Analysis of the charge–discharge curves in relative coordinates reveal that microcracks form during cycling and are filled with a passive film, as an important mechanism of electrode degradation.