Multi-component lithium ion battery anode material rich in lithium and preparation method thereof

Abstract

The invention discloses a multi-component lithium ion battery anode material rich in lithium and a preparation method thereof. The molecular formula of the multi-component lithium ion battery anode material rich in lithium is Li1.17Ni0.17Co0.17Mn0.50O2. The preparation method comprises the steps of firstly adopting an alcoholysis solid phase method, utilizing ethanol to dissolve cobalt acetate, nickel acetate, manganese acetate and lithium acetate, drying the mixture of dissolved cobalt acetate, nickel acetate, manganese acetate and lithium acetate by controlling the temperature at 120 DEG C so as to obtain transition metal acetate presoma solid powder; and finally, carrying out two times of sintering on the obtained transition metal acetate presoma powder in a high temperature pipe furnace system, and then carrying out sufficient ball milling until the particle diameter of a grain is less than 1 mum, thus obtaining the multi-component lithium ion battery anode material rich in lithium, with good morphological structure, small particle size distribution and better battery property; and the preparation method has the characteristics of being simple in preparation process, low in production cost, suitable for scale production and the like.

Description

technical field [0001] The invention belongs to the technical field of lithium-ion battery cathode material preparation, and in particular relates to a lithium-rich multi-element composite lithium-ion battery cathode material and a preparation method thereof. Background technique [0002] Lithium-ion battery cathode material is currently an important factor limiting the capacity of lithium-ion batteries and overall battery performance. Regardless of whether it is a positive electrode material or a negative electrode material, the related preparation technology has a great influence on the performance of the material. For now, from the perspective of the entire process of material preparation, there are nothing more than two preparation technologies for battery materials: liquid-phase method and solid-phase method. Lithium cobalt oxide (LiCoO 2 ) [1] Since the first lithium-ion battery as the cathode material was successfully released, experts and scholars from various cou...

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Problems solved by technology

[0015] One of the purposes of the present invention is to provide a method for preparing a lithium-rich multi-component composite lithium-ion battery positive electrode material in order to solve the technical problems of the above-mentioned lithium-rich multi-component composite cathode material, such as complex preparation process, high cost, and difficulty in large-scale application.

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