The present invention advantageously provides a high-
voltage lithium battery 
cathode material and its general formula for the composition of the high-
voltage lithium battery 
cathode material presented in this invention:LiMn1.5Ni0.5-XMXO4 Of which: 0<X≦0.2, M represents one or several elements comprised by 
copper, 
zinc, 
magnesium, aluminum, 
cadmium, 
zirconium, and 
titanium.The present invention relates to a high-
voltage lithium battery 
cathode material, which utilizes the liquid-phase co-
precipitation method to dope 
transition metal elements, so that all elements could be mixed at the atomic level and obtain a relatively uniform product, stabilizing the 
crystal structure, avoiding the capacity attenuation caused by 
structure collapse in the material 
cyclic process; in addition, this invention has also increased the 
conductivity, improved the capacity of 5 V platform, thereby avoiding the substantial damage to the 
battery system resulted from the 
decomposition of the 
electrolyte. Thus, a newly high-voltage 
lithium battery cathode material featured with good electrochemical properties and cycle performance has been proposed in the present invention; moreover, the utilization of liquid-phase co-
precipitation has the advantages of simple synthesis method, convenient operation process, easier to control, high yield coefficient, low 
energy consumption, and easy-to-industrial production.