Method for producing lithium manganate

Abstract

The invention provides a method for producing lithium manganate. The method comprises the following steps of: mixing electrolytic manganese dioxide and a lithium-containing compound by adopting a dry method, wherein a molar ratio of Mn:Li is 2:1.08; heating the mixed raw materials to the temperature of 550-650 DEG C, and keeping the temperature for 1-2 hours; adding an adhesive into the pre-sintered materials, pressing the materials into blocks by using a roller press, cutting the blocks into the required size according to the size of a burning plate, thus obtaining material blocks to be burned; stacking the blocks on the burning plate, sintering the blocks in a calcining kiln, wherein the sintering temperature is 750-850 DEG C; keeping the temperature for 3-5 hours, naturally reducing the temperature, and finishing the sintering process; and finally, crushing the blocks by adopting a rolling machine, thus obtaining a finished product. The lithium manganate material is pressed and sintered, relevant parameters in the preparation process are optimized, the sintering time of the lithium manganate is shortened, lithium volatilization in the sintering process is reduced, the resources and material cost are saved, and the yield is increased.

Description

technical field [0001] The invention relates to the technical field of preparation of new energy materials, in particular to a method for producing lithium manganate. Background technique [0002] Lithium manganate material (LiMn 2 o 4 ) As the cathode material of lithium-ion batteries, it is widely used in communications, electric tools, electric bicycles and electric vehicle power batteries and other fields. For the production method of lithium manganese oxide materials, the current mainstream synthesis method in the industry is high-temperature solid-phase method, that is, select solid compounds such as lithium and manganese oxides or carbonates, and react them to generate lithium manganate materials through high-temperature burning. [0003] In the method of using electrolytic manganese dioxide (EMD) as a precursor and using lithium element to produce lithium manganate material by high temperature solid phase method, refractory material (or stainless steel medium) is u...

AI Technical Summary

Problems solved by technology

Moreover, due to the existence of the firing medium, the way of firing and heating becomes complicated, and part of it requires heat conduction, that is, the firing medium is heated first, and then the heat is transferred from the firing medium to the material to be fired, and the thermal conductivity of the firing medium is usually Poor, which causes a certain waste of energy

Due to the forced air blast and exhaust, the heat loss of the kiln increases, and the heat preservation power of the kiln increases, resulting in a lot of waste of energy

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