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Lithium manganate production method

A production method and technology of lithium manganate, applied in the direction of manganate/permanganate, electrical components, battery electrodes, etc., can solve the problem of increased kiln heat preservation power, increased kiln heat loss, waste of energy and resources and other problems, to achieve the effects of shortening the firing time, increasing production capacity and reducing heat loss

Inactive Publication Date: 2014-03-05
WUXI JEWEL POWER & MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Moreover, due to the need to absorb or release oxygen, it is necessary to ensure that the material has a sufficient contact surface with the air, so the loading must be limited.
Due to the forced ventilation, the heat loss of the kiln increases, and the heat preservation power of the kiln increases, resulting in a lot of energy waste
Due to the limitation of loading capacity, the production capacity is reduced, resulting in waste of energy and resources

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] First, take 87kg of electrolytic manganese dioxide, 45.8kg of manganese tetraoxide, and 33.3kg of lithium carbonate as raw materials, and mix them with a molar ratio of Mn:Mn:Li of 5:3:4.5, and dry mix to obtain a fully mixed and uniform After that, the mixed raw materials are heated to 500°C and kept for 2 hours; the pre-fired materials are pressed into blocks and stacked for firing; the firing temperature is 800°C, kept for 5 hours, and then cooled naturally to complete the sintering process , that is, the product is obtained.

Embodiment 2

[0025] First, take 87kg of electrolytic manganese dioxide, 45.8kg of trimanganese tetraoxide, and 37kg of lithium carbonate as raw materials, mix them with a molar ratio of Mn:Mn:Li of 5:3:5, and add 3.4kg of alumina Powder, to obtain fully mixed and uniform raw materials by dry mixing; then heat the mixed raw materials to 550°C and keep them warm for 2 hours; press the pre-fired materials into blocks and stack them for firing; the firing temperature is 850°C and keep warm for 3 hours Hours, and then lower the temperature naturally to complete the sintering process and obtain the product.

Embodiment 3

[0027] First, take 87kg of electrolytic manganese dioxide, 45.8kg of trimanganese tetraoxide, and 37kg of lithium carbonate as raw materials, mix them with a molar ratio of Mn:Mn:Li of 5:3:5, and add 1.7kg of cobalt oxide Powder, to obtain fully mixed and uniform raw materials by dry mixing; then heat the mixed raw materials to 550 ° C and keep them warm for 2 hours; press the pre-fired materials into blocks and stack them for firing; the firing temperature is 900 ° C and keep them warm for 3 hours. Hours, and then lower the temperature naturally to complete the sintering process and obtain the product.

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PUM

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Abstract

The present invention provides a lithium manganate production method, which comprises: taking electrolytic manganese dioxide, trimanganese tetraoxide and lithium carbonate as raw materials, carrying out matching and material mixing according to a molar ratio of Mn to Mn to Li of 5:3:5, and carrying out dry mixing to obtain the completely-mixed raw material; heating the mixed raw material to achieve a temperature of 500-550 DEG C, and carrying out thermal insulation for 1-2 h; briquetting the pre-burnt material, stacking, and firing, wherein a firing temperature is 800-900 DEGC; and carrying out thermal insulation for 3-5 h, and naturally cooling to complete the sintering process so as to obtain the product. According to the present invention, the lithium manganate firing time is shortened, volatilization of the lithium element during the sintering process is reduced, the resources and the material cost are saved, and production capacity is increased.

Description

technical field [0001] The invention relates to the technical field of preparation of new energy materials, in particular to a production method of lithium manganese oxide. Background technique [0002] In recent years, lithium manganate material, as the positive electrode material of lithium-ion batteries, has been 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 existing method of using electrolytic manganese dioxide (EMD), manganese tetraoxide, manganese carbonate and other manganese oxides or carbonates as precursors, with lithium elements for high-temperatur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/505
CPCY02E60/122C01G45/12H01M4/505Y02E60/10
Inventor 马岩华
Owner WUXI JEWEL POWER & MATERIALS
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