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Preparation method of spherical lithium manganate material

A technology of spherical lithium manganate and lithium manganate, applied in chemical instruments and methods, manganate/permanganate, manganese compounds, etc., can solve the problems of poor chemical performance of lithium manganate and low battery life , to achieve good industrialization prospects, low production costs, and improve service life

Inactive Publication Date: 2021-07-16
安徽博石高科新材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The object of the present invention is to provide a kind of preparation method of spherical lithium manganese oxide material, to solve the low service life of the battery made of lithium manganate proposed in the above-mentioned background technology and the electrochemical reaction of lithium manganate prepared by manganese salt and lithium salt. poor performance problem

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  • Preparation method of spherical lithium manganate material

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preparation example Construction

[0031] The present invention provides a kind of preparation method of spherical lithium manganese oxide material here by improving, as figure 1 shown, including the following steps:

[0032] S1. Mixing of raw materials: Weigh the three raw materials of manganese oxide, lithium source compound and metal ion substance according to the required ratio, and then put the raw materials into the mixing equipment for mixing, so as to mix the raw materials evenly;

[0033] S2. Initial sintering: Put the raw materials mixed in the previous step into the muffle furnace, and then start the muffle furnace to pre-sinter the mixed raw materials to obtain lithium manganate material. The molecular formula of the obtained product is Li1+aMn2-aO4, 0≤a≤0.2;

[0034] S3. Glue configuration: Weigh the raw materials required for the glue according to the required ratio, and then put the raw materials into a high-speed mixer and mix them to obtain the glue;

[0035] S4. Grinding and mixing: Add the ...

Embodiment 1

[0048] A preparation method of a spherical lithium manganate material, comprising the following steps:

[0049] S1. Raw material mixing: weigh Mn3O4 and nanometer electrolytic MnO according to the required ratio 2 , LiOH, and metal ion substances (La, Ce, Nd), and then put the raw materials into the mixing equipment for mixing. When mixing, different frequencies are used to mix the raw materials, and the mixing time is 2 hours, so that the raw materials are mixed evenly;

[0050] S2. Initial sintering: Send the mixed raw materials in the previous step into the muffle furnace, and then start the muffle furnace to pre-fire the mixed raw materials. The pre-fired time is 8 hours, and the pre-fired temperature is 500°C to obtain manganese. Lithium acid material, the molecular formula of the obtained product is Li1+aMn2-aO4, 0≤a≤0.2;

[0051]S3. Glue configuration: Weigh the raw materials required for the glue according to the required ratio. The raw materials of the glue are solve...

Embodiment 2

[0056] A preparation method of a spherical lithium manganate material, comprising the following steps:

[0057] S1. Raw material mixing: weigh Mn3O4 and nanometer electrolytic MnO according to the required ratio 2 , LiOH, and metal ion substances (La, Ce, Nd), and then put the raw materials into the mixing equipment for mixing. When mixing, different frequencies are used to mix the raw materials, and the mixing time is 2 hours, so that the raw materials are mixed evenly;

[0058] S2. Initial sintering: Send the mixed raw materials in the previous step into the muffle furnace, and then start the muffle furnace to pre-fire the mixed raw materials. The pre-fired time is 8 hours, and the pre-fired temperature is 500°C to obtain manganese. Lithium acid material, the molecular formula of the obtained product is Li1+aMn2-aO4, 0≤a≤0.2;

[0059] S3. Glue configuration: Weigh the raw materials required for the glue according to the required ratio. The raw materials of the glue are solv...

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Abstract

The invention relates to the field of preparation of lithium manganate materials, in particular to a preparation method of a spherical lithium manganate material. The preparation method comprises the steps of S1, mixing raw materials, specifically, weighing three raw materials, namely, manganese oxide, a lithium source compound and a metal ion substance, according to a required ratio, and then putting the raw materials into mixing equipment for mixing so as to uniformly mix the raw materials; S2, conducting primary sintering, specifically, feeding the raw materials mixed in the previous step into a muffle furnace, then starting the muffle furnace to pre-burn the mixed raw materials so as to obtain the lithium manganate material, wherein the molecular formula of the obtained finished product is Li<1+a>Mn<2-a>O4 , and a is greater than or equal to 0 and less than or equal to 0.2; and S3, preparing a glue solution, specifically, weighing raw materials required by the glue solution according to the required proportion. The preparation method has the beneficial effects that the glue solution is added during grinding, so that the surface of the lithium manganate material is uniformly coated with the glue solution, the gram volume and high-temperature cycle performance of lithium manganate are improved, the service life of a lithium manganate battery is prolonged, the lithium manganate is prepared by adopting nano-electrolysis MnO, Mn3O4 and LiOH, and the electrochemical performance of the lithium manganate material can be improved.

Description

technical field [0001] The invention relates to the field of preparation of lithium manganate materials, in particular to a method for preparing spherical lithium manganate materials. Background technique [0002] Lithium manganese oxide is one of the more promising lithium ion cathode materials. Compared with traditional cathode materials such as lithium cobalt oxide, lithium manganate has the advantages of abundant resources, low cost, no pollution, good safety, and good rate performance. It is an ideal Cathode materials for power batteries. [0003] Chinese Patent No. CN107565122A provides a method for preparing a doped nickel-cobalt lithium manganate cathode material. The specific process of its preparation is as follows: the nickel-cobalt-manganese precursor, niobium source and lithium salt are ball-milled and mixed according to a certain ratio, and the doped nickel-cobalt-manganese lithium manganese oxide is obtained after pre-calcination, secondary ball milling, and ...

Claims

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Application Information

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IPC IPC(8): C01G45/12H01M4/505H01M10/0525
CPCC01G45/1221C01G45/1242C01P2004/32C01P2006/10H01M4/505H01M10/0525H01M2004/028Y02E60/10
Inventor 陈鹏鹛陈静波
Owner 安徽博石高科新材料股份有限公司