Method for synthesizing doping lithium manganic acid

Abstract

The present invention provides a synthesizing method of doping lithium manganese oxide, which is essentially used for lithium ion battery anode active material. A doping material is mixed into Li2CO3 and electrolysis MnO 2 material. The doping material comprises any two of Al, Co, Cr, Fe, Y trivalent cations and any one of F, Cl, I anions. The raw material is mechanically mixed, high-speed milled and sieved to prepare a mixture. The mixture is roasted according to a set program in a rotary resistance furnace. After cooling, the mixture is milled and sieved again to prepare the product. The method is simple in reaction process, low in cost and even in mixture, which effectively improves the electrochemical property and recycling property of material and causes no pollution to the environment.

Description

technical field [0001] The invention relates to a method for synthesizing doped and modified lithium manganate mainly used as positive electrode active materials of lithium ion batteries. Background technique [0002] Among the positive electrode materials of many lithium-ion batteries, lithium manganese oxide has many advantages such as cheap price, simple synthesis, good safety performance, high platform voltage, non-toxic and non-polluting. However, compared with the currently widely used lithium cobalt oxide, the problems of low initial capacity, poor cycle performance, especially poor cycle performance at high temperature must be solved in the vigorous development of lithium manganese oxide materials. In recent years, a large number of domestic and foreign literatures have reported plans to improve the cycle performance of materials by means of doping and modification. The synthesis methods are roughly divided into high-temperature solid-state reaction methods and soft ...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a new synthesis method of doped lithium manganate, which improves the traditional high-temperature solid-phase reaction method, and not only retains the simplicity of solid-phase reaction steps , low cost, and solve the problem of uneven mixing of solid phase method and poor electrochemical performance of materials, and will not pollute the environment