Investigation of the irreversible capacity loss in the layered LiNi1/3Mn1/3Co1/3O2 cathodes

The irreversible capacity (IRC) loss in the first cycle at 3.0-4.6 V of layered LiNi1/3Mn1/3Co1/3O2 cathodes has been investigated as a function of synthesis temperature (600-900 degrees C), and compared with that of LiCoO2. The IRC values in both the systems increase with decreasing synthesis temperature and show a linear relationship with the Brunauer-Emmett-Teller surface area although the increase is faster with LiCoO2. Additionally, the IRC is found to exhibit a relationship to an irreversible anodic peak observed in cyclic voltammograms at around 4.5 V, which becomes prominent with decreasing synthesis temperature and increasing Mn content in LiNi1-y-zMnyCozO2. (c) 2005 The Electrochemical Society.