STUDIES ON THE STRUCTURE OF LINI0.3CO0.7O 2 AND THE BEHAVIOR OF ITS LITHIUM BATTERY

XRD, XPS and CV have been used to study the structure of LiNi0.3Co0.7O 2 and the behavior of its lithium battery, It is shown that LiNi0.3Co0 .7O2 has a space group R (3) over bar m with hexagonal parameter a = 0 .2826 nm, c = 1.4130 nm. Li2O was identified on its surface. Its lithi um battery exhibited a discharge capacity of 120-140 mA . h . g(-1) at the rate of 0.5 similar to 0.1 mA . cm(-2) in the voltage range of 4. 30-3.00 V in 1 mol . L(-1) LiClO4/PC system, the discharge mechanism o f the battery involved a two-stage Li+ intercalation in LiNi0.3Co0.7O2 . Also, the chemical diffusion coefficent of Li+ in LixNi0.3Co0.7O2 is about 1-7 X 10(-8) cm(2) . s(-1) in the range of x from 0.775 to 1.