Characterization and cathode performance of Li1 − xNi1 + xO2 prepared with the excess lithium method
Samples of Li1 − zNi1 + xO2 with various x values were synthesized and their electrochemical properties, phase transitions, and ordering phenomena were investigated comparatively. In order to synthesize samples with a small x value, an excess lithium was used as a starting material to compensate for lithium loss during the calcination process. A stoichiometric sample with a large reversible capacity of more than 200 mAh g−1 is also described.