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Due to its high operating voltage the so-called high voltage spinel (LiNi0,5Mn1,5O4) is a promising cathode material. In this work the kinetics of the capacity loss during cycling and its change due to different coatings are analyzed. In a second part the electrochemical behavior for the insertion of a second lithium per formula unit is discussed for different doped spinel materials.

Degradation --- Hochvoltspinell --- Tiefentladunglithium ion battery --- Lithiumionenbatterie --- degradation --- high voltage spinel --- deep discharge