| 摘要 |
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:
€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒLiMn 1.5 Ni 0 . 5-X M X O 4
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 5V 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. |
