Lithium battery metal oxide precursor, cathode material, and preparation method thereof

A cathode material and precursor technology, applied in the field of lithium battery metal oxide precursors, can solve the problems of lithium loss, increased energy consumption of multi-materials, large gap between primary particles of precursors, etc., to overcome energy consumption, residual alkali and sulfur content reduced effect

Active Publication Date: 2013-07-03
当升科技(常州)新材料有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0014] The object of the present invention is to provide a lithium battery metal oxide precursor, positive electrode material and preparation method thereof, the primary particle gap of the precursor is large, the residual alkali and sulfur content of the lithium battery positive electrode material prepared by it is low, the preparation method is simple, overcomes the Residual alkali and sulfur impurities cannot be effectively removed, and a large amount of lithium loss caused by washing multi-component materials and high-temperature treatment of multi-component materials increase energy consumption, etc., suitable for mass industrial production

Method used

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  • Lithium battery metal oxide precursor, cathode material, and preparation method thereof
  • Lithium battery metal oxide precursor, cathode material, and preparation method thereof
  • Lithium battery metal oxide precursor, cathode material, and preparation method thereof

Examples

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Effect test

Embodiment 1

[0036] A kind of lithium battery metal oxide precursor, its molecular formula is (Ni 0.5 co 0.3 mn 0.2 ) 2 o 3 , the primary particle gap ranges from 0.25 to 1.29μm, and the sulfur content is 130ppm; the electron microscope photos are as follows figure 2 shown. Its preparation method is, the prepared Ni 0.5 co 0.3 mn 0.2 (OH) 2 Raise to 930°C at a heating rate of 5°C / min, calcinate for 6 hours under air conditions, and then lower the temperature at a rate of 5°C / min to obtain the product. Prepared Ni 0.5 co 0.3 mn 0.2 (OH) 2 Electron microscope photos such as figure 1 shown.

[0037] The multi-component material prepared by the above-mentioned metal oxide precursor, the electron microscope photo is as follows Figure 5 As shown, its molecular formula is Li 1.02 Ni 0.5 co 0.3 mn 0.2 o 2 , the alkali content of the material is 730ppm. Its preparation method is, above-mentioned precursor (Ni 0.5 co 0.3 mn 0.2 ) 2 o 3 The molar ratio with lithium is 1:1....

Embodiment 2

[0039] A kind of lithium battery metal oxide precursor, its molecular formula is (Ni 0.3 co 0.1 mn 0.6 ) 2 o 3 , the primary particle gap ranges from 0.13 to 0.90μm, and the sulfur content is 420ppm; the electron microscope photos are as follows image 3 shown. Its preparation method is, the prepared Ni 0.3 co 0.1 mn 0.6 (OH) 2 Raise to 800°C at a heating rate of 8°C / min, calcinate for 10 hours under air conditions, and then lower the temperature at a rate of 3°C / min to obtain the obtained product.

[0040] The multi-element material prepared by the above-mentioned metal oxide precursor, its molecular formula is Li 1.05 Ni 0.3 co 0.1 mn 0.6 o 2 , the alkali content of the material is 850ppm. Its preparation method is, above-mentioned precursor (Ni 0.3 co 0.1 mn 0.6 ) 2 o 3 The molar ratio with lithium is 1:1.05, ball milled for 8 hours, and the speed is 500r / min. 15m at ℃ 3 The flow rate of / h is passed into cold dry air, and when the temperature is lowere...

Embodiment 3

[0042] A kind of lithium battery metal oxide precursor, its molecular formula is (Ni 0.55 co 0.4 al 0.05 ) 2 o 3 , the primary particle gap ranges from 0.09 to 0.41μm, and the sulfur content is 1100ppm; the electron microscope photos are as follows Figure 4 shown. Its preparation method is, the prepared Ni 0.55 co 0.4 al 0.05 (OH) 2 Raise to 700°C at a heating rate of 5°C / min, calcinate for 3 hours under air conditions, and then lower the temperature at a rate of 1°C / min.

[0043] The multi-element material prepared from the above-mentioned metal oxide precursor, its molecular formula is LiNi 0.55 co 0.4 al 0.05 o 2 , the alkali content of the material is 1100ppm. Its preparation method is, above-mentioned precursor (Ni 0.55 co 0.4 al 0.05 ) 2 o 3 The molar ratio with lithium is 1:1, ball milled for 2 hours, the speed is 1000r / min, the mixture is loosely packed into a sagger, and the temperature is raised to 700°C for 20 hours at a heating rate of 1°C / min. W...

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Abstract

The invention relates to a lithium battery metal oxide precursor, a cathode material, and a preparation method thereof, and particularly relates to a lithium battery metal oxide precursor with large primary particle gaps, a cathode material with low impurity content, and a preparation method thereof. The precursor has a molecular formula of (Ni1-x-yCoxMy)2O3, wherein 0<=x<1, 0<=y<1, M is Mn, Al, Fe, Ti, or the like, and the gas between primary particles is 0.05-2 microns; the cathode material prepared by the precursor has a molecular formula of Li1+thetaNi1-x-yCoxMyO2, wherein 0<=theta<=0.15, the residual alkali content is not more than 1200 ppm, and the sulfur content is not more than 1200 ppm. The precursor has large primary particle gaps; the lithium battery cathode material prepared by the precursor has low residual alkali content and low sulfur content; the preparation method is simple; problems of no effective removal of residual alkali and sulfur impurities, great lithium loss caused by multielement material washing, energy consumption increase during high temperature processing of multielement materials, and the like are overcome; and the preparation method is suitable for large scale industrial production.

Description

technical field [0001] The invention relates to a lithium battery metal oxide precursor, in particular to a lithium battery metal oxide precursor with a large primary particle gap. [0002] The present invention also relates to a preparation method of the lithium battery metal oxide precursor. [0003] The present invention also relates to a lithium battery cathode material prepared by using the lithium battery metal oxide precursor and a preparation method thereof. Background technique [0004] Lithium-ion batteries are a new generation of green energy storage batteries, with outstanding advantages such as high voltage, high energy density, good cycle performance, small self-discharge, and no memory effect. They are widely used in various portable electric tools, electronic instruments, mobile phones, Notebook computers, camcorders, weaponry, etc. also have good application prospects in electric vehicles. Cathode materials are an important part of lithium-ion batteries, a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/48H01M4/485
CPCY02E60/10
Inventor 杜贺宝王小兰李琪永陈彦彬张天广
Owner 当升科技(常州)新材料有限公司
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