Method for preparing lithium ion battery anode material LiNi0.5Mn1.5O4

A technology for lithium-ion batteries and positive electrode materials, applied in chemical instruments and methods, inorganic chemistry, nickel compounds, etc., can solve the problems of small number of samples, inability to achieve continuity, poor performance, etc., and achieve reduced production process steps and stable cycle Excellent, the effect of reducing production costs

Inactive Publication Date: 2012-07-04
CHINA ELECTRONIC TECH GRP CORP NO 18 RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These methods more or less have shortcomings, such as: complex process, long preparation time, inability to achieve continuity, harsh process conditions and difficult to control, very few samples prepared, many impurities, poor performance, High cost, not suitable for large-scale commercial production

Method used

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  • Method for preparing lithium ion battery anode material LiNi0.5Mn1.5O4
  • Method for preparing lithium ion battery anode material LiNi0.5Mn1.5O4
  • Method for preparing lithium ion battery anode material LiNi0.5Mn1.5O4

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preparation example Construction

[0020] A kind of lithium-ion battery cathode material LiNi 0.5 mn 1.5 o 4 The preparation method is characterized in that: comprises the following steps:

[0021] (1) Liquid phase ball milling: weigh the lithium compound, the nickel-containing compound and the manganese-containing compound at a ratio of 1:1-1.5:2-5 in a mass ratio of the lithium-containing compound, the nickel-containing compound, and the manganese-containing compound, and place them in a solvent liquid-phase ball milling; the total amount of the three compounds and the content of the solvent are 0.1-0.3g / ml;

[0022] (2) Spray drying: Put the ball mill product into a high-speed spray dryer for spray drying. The inlet and outlet temperatures of the spray dryer are 160-300°C and 80-120°C respectively, and the rotation speed of the atomizing disc in the spray dryer is 20,000 -40000r / min;

[0023] (3) Sintering: The spray-dried product is kept at a constant temperature of 500-1200°C for 1-16 hours in an air o...

Embodiment 1

[0029] 194.33g of Li 2 CO 3 , 199.75g of NiO and 605.30g of Mn 3 o 4 Add to 5000mlC 2 h 5 In OH, put it into a high-speed spray dryer for spray drying after ball milling by a stirring ball mill for 2 hours. The inlet temperature of the spray dryer is set to 180°C, the outlet temperature is set to 80°C, and the rotation speed of the atomizing disc in the spray dryer is 25000r / Min, spray the obtained product into the muffle furnace, in the air atmosphere, heat up to 800°C at a rate of 10°C / min, keep the temperature for 10h, and naturally cool to room temperature, that is, LiNi, the positive electrode material for lithium-ion batteries. 0.5 mn 1.5 o 4 .

Embodiment 2

[0031] The sintering temperature is 700° C., and other conditions are the same as in Example 1.

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Abstract

The invention relates to a method for preparing a lithium ion battery anode material LiNi0.5Mn1.5O4. The method comprises the following steps of: (1) liquid phase ball milling: performing liquid phase ball milling on a lithium-containing compound, a nickel-containing compound and a manganese-containing compound in a mass ratio of 1: (1-1.5): (2-5) in a solvent; (2) spray drying: performing spray drying on the ball-milled product in a high-speed spray drying machine; and (3) sintering: performing high-temperature sintering on the spray-dried product in a furnace, cooling the product to room temperature, crushing and grading, and thus obtaining the lithium ion battery anode material LiNi0.5Mn1.5O4. By adopting the preparation process of liquid phase ball milling, spray drying and sintering, the production process is greatly reduced, the synthesis time is short, and the production cost is reduced; and the method is easy to operate, and can realize continuous and large-scale commercial production. The lithium ion battery anode material LiNi0.5Mn1.5O4 has the characteristics of stable structure, high specific capacity and circular, stable and excellent electrochemical performance.

Description

technical field [0001] The invention belongs to the technical field of lithium-ion battery cathode materials, in particular to a lithium-ion battery cathode material LiNi 0.5 mn 1.5 o 4 method of preparation. Background technique [0002] At present, lithium-ion batteries are widely used in mobile communication power supplies, laptop computers, camera / video recorders, power tools and other fields due to their superior electrochemical performance and environmental friendliness. And it is getting more and more attention in the fields of electric vehicles, HEV, PHEV and other power batteries, and the key is the choice of material system, especially the positive electrode active material. With the advancement of science and technology, higher requirements have been placed on the specific energy and specific power of lithium-ion batteries. Therefore, finding a new type of lithium-ion battery cathode material with high specific energy and high specific power has become the foc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G53/00
Inventor 彭庆文刘兴江任丽彬
Owner CHINA ELECTRONIC TECH GRP CORP NO 18 RES INST
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