Preparation method of metallic oxide coated battery cathode material

A battery positive electrode and positive electrode material technology, applied to battery electrodes, circuits, electrical components, etc., can solve the problems of low coating rate, difficult industrial production, poor stability of supercritical state, etc., and achieve the effect of simplifying the coating process

Inactive Publication Date: 2017-06-13
SHENZHEN CITY BATTERY NANOMETER TECH
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  • Summary
  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method needs to convert carbon dioxide gas into a supercritical state, and then load the positive electrode material and coating material. On the one hand, converting carbon dioxide gas into a supercritical state requires a large amount of energy, and on the other hand, existing devices need to be modified. It can meet the production demand, and the stability of the supercritical state is poor, and the requirements for the conditions of the device are high.
[0007] It can be seen that in the prior art, the coating methods of the metal oxide of the positive electrode material of the battery are relatively complicated, the energy consumption is high, the equipment modification is cumbersome, it is not easy to carry out industrial production, and the coating rate of the prior art is low, and the coating uniformity is poor

Method used

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preparation example Construction

[0050] The specific embodiment part of the present application provides a method for preparing a positive electrode material of a metal oxide-coated battery, the method comprising the following steps:

[0051] (1) Coating the positive electrode material base material and the coating liquid in the jet mill by impinging flow to obtain the coating material precursor;

[0052] (2) Sintering the coating material precursor obtained in step (1) to obtain a positive electrode material for a metal oxide coated battery.

[0053] In order to facilitate understanding of the present invention, the present invention enumerates the following examples. It should be clear to those skilled in the art that the embodiments are only for helping to understand the present invention, and should not be regarded as specific limitations on the present invention.

Embodiment 1

[0055] A method for preparing a metal oxide-coated positive electrode material for a battery, the method comprising the following steps:

[0056] (1) 1500g of positive electrode material LiNi 1 / 3 co 1 / 3 mn1 / 3 Oh 2 The substrate, 5g of aluminum isopropoxide, 30g of isopropanol, 5g of concentrated hydrochloric acid, and 70g of dimethyl silicone oil are sent into the FJM400 jet mill, and the screw quantitative feeding and air flow are carried out simultaneously, and the screw feeding speed is 60r / min, dry air moisture content 0.15%, air pressure 0.5Mpa, air flow 5m 3 / min, the contact time is 2min, the speed of the positive electrode material base material and the impact flow of the coating liquid is Mach 2.2, the speed of the zirconium sheet classifying wheel is 3000r / min, and the impact flow is used for coating to obtain the coating material precursor ;

[0057] (2) Put the coating material precursor obtained in step (1) in a box furnace, heat it at 800° C. for 4 hours, an...

Embodiment 2

[0060] A method for preparing a metal oxide-coated positive electrode material for a battery, the method comprising the following steps:

[0061] (1) 1500g of positive electrode material LiCoO 2 The substrate, 35g of tetrabutyl titanate, 40g of absolute ethanol, 10g of concentrated hydrochloric acid, and 100g of dimethyl silicone oil are sent into the FJM400 jet mill, and the screw quantitative feeding and air flow are carried out simultaneously. 60r / min, dry air moisture content 3 / min, the contact time is 2min, the speed of the positive electrode material base material and the impact flow of the coating liquid is Mach 3.0, the speed of the zirconium disc classification wheel is 8000r / min, and the impact flow is used for coating to obtain the coating material precursor ;

[0062] (2) The coating material precursor obtained in step (1) was placed in a box furnace, kept at 750° C. for 6 hours, and sintered at a heating rate of 5° C. / min to obtain a metal oxide-coated battery p...

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PUM

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Abstract

The invention relates to a preparation method of a metallic oxide coated battery cathode material. The preparation method comprises the steps as follows: a cathode material substrate is coated with a coating liquid in an air-stream mill in an impinging stream manner, and a coated material precursor is obtained; the obtained coated material precursor is sintered and the metallic oxide coated battery cathode material is obtained. According to the preparation method, the battery cathode material is coated with a metallic oxide in the impinging stream manner by the aid of air-stream mill equipment, the coating rate and coating uniformity of the metallic oxide are increased, meanwhile, the coating process is controlled by adjusting parameters of the air-stream mill, and the preparation method is simple and can be applied to industrial production.

Description

technical field [0001] The invention relates to the field of batteries, in particular to a method for preparing a positive electrode material for a battery, in particular to a method for preparing a metal oxide-coated positive electrode material for a battery. Background technique [0002] Since Japan's SONY company released the world's first commercial lithium-ion secondary battery in the 1990s, lithium-ion batteries have developed rapidly, especially positive electrode materials, from lithium cobalt oxide (LiCoO2) to manganic acid with a spinel structure. Lithium (LiMn 2 o 4 ), lithium iron phosphate (LiFePO 4 ) to layered multiple oxides (LiCo x Ni y mn 1-x-y o 2 , x+y≤1 and LiCo 0.2 Ni 0.8 o 2 、LiCo 0.2 Ni 0.75 al 0.05 o 2 etc.), whether it is commercial application or scientific research, has set off a wave of research. As the range of applications becomes wider and wider, people's requirements for lithium-ion batteries are also increasing: high energy den...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/62
CPCH01M4/62H01M4/628Y02E60/10
Inventor 崔伟超王张健杨顺毅任建国黄友元
Owner SHENZHEN CITY BATTERY NANOMETER TECH
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