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High-nickel ternary positive electrode material with high electrical property consistency, preparation method thereof and application thereof

A cathode material, high-nickel technology, applied in electrical components, battery electrodes, circuits, etc., can solve the problems of limited application of high-nickel lithium-ion batteries, low storage consistency, etc., to improve physical properties and electrochemical properties, spherical The effect of good degree and high particle size consistency

Inactive Publication Date: 2019-05-03
高点(深圳)科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] For this reason, the technical problem solved by the present invention is: the storage consistency of the lithium-ion battery prepared by using high-nickel ternary positive electrode material in the prior art is not high, resulting in limited application of high-nickel lithium-ion battery

Method used

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  • High-nickel ternary positive electrode material with high electrical property consistency, preparation method thereof and application thereof
  • High-nickel ternary positive electrode material with high electrical property consistency, preparation method thereof and application thereof
  • High-nickel ternary positive electrode material with high electrical property consistency, preparation method thereof and application thereof

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preparation example Construction

[0060] The present invention provides a method for preparing the anode material, which comprises the following steps: (1) mixing a lithium source, a nickel-cobalt M precursor, and an R source in a molar ratio of 1.0-1.2:1:0.00-0.003, Then carry out the first sintering;

[0061] (2) subjecting the product obtained in step (1) to pulverization and classification to obtain a classification product;

[0062] (3) mixing the graded product obtained in step (2) with the remaining R source to obtain a semi-finished product;

[0063] (4) The semi-finished product obtained in step (3) is sintered for the second time, then pulverized and classified, and mixed to obtain the positive electrode material.

[0064] In a preferred embodiment of the present invention, wherein, in step (1), the lithium source is selected from one or more of lithium carbonate, lithium hydroxide monohydrate, lithium acetate and lithium oxalate .

[0065] In a preferred specific embodiment of the present inventi...

Embodiment 1

[0094] The preparation of embodiment one cathode material

[0095] (1) Use a 200L plow mixer. Turn on stirring (speed 25rpm), add 100kg of nickel-cobalt-manganese precursor (Ni 0.61 co 0.19 mn 0.20 (OH) 2 (grain size D v50 : 7 μm, effective substance content 99.5%), then take by weighing 46.1kg monohydrate lithium hydroxide powder (particle size D v50 : 25 μm, active matter content 99.5%) join in mixer, add 37.0kg deionized water by 80wt% solid content under stirring situation, then add 1.43kg basic cobalt carbonate (account for 7000ppm by adding cobalt amount in finished product), After stirring for 2 hours, further reduce the speed (5rpm) and stir for 6 hours to form a paste-like material with a certain degree of molding; Oxygen Air oxygen content 40%, flow rate 400Nm 3 / h) Put the material into a ceramic bowl for the first sintering, sintering for 10 hours, cool the material to normal temperature under the protection of dry nitrogen, weigh the weight of the incoming ...

Embodiment 2

[0101] The preparation of embodiment two cathode materials

[0102] (1) Select 200LY mixer. Start stirring (rotating speed 50rpm), add the nickel-cobalt-manganese precursor (Ni 0.61 co 0.20 mn 0.20 (OH) 2 (grain size D v50 : 7 μm, effective substance content 99.5%), then take by weighing 41.5kg lithium carbonate powder (particle size D v50 : 5 μm, active matter content 99.8%) into the mixer, add 20.0kg deionized water according to 90% solid content under stirring, further reduce the speed (3-5rpm) after stirring for 2 hours, and stir for 1 hour to form a certain shape The paste material discharging of degree; Adopt the method identical with embodiment 1 to carry out primary sintering (oxygen-enriched air oxygen content 99.5%, flow rate 200Nm 3 / h), loss on ignition is 33.8% based on raw materials;

[0103] (2) The product obtained in step (1) is pulverized with a cyclone vortex pulverizer, and the pulverized material passes through the first stage classification wheel (...

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Abstract

The invention relates to the field of lithium-ion batteries and particularly relates to a high-nickel ternary positive electrode material with high electrical property consistency, a preparation method thereof and an application thereof. The high-nickel ternary positive electrode material with high electrical property consistency is characterized in that the chemical structural formula is LixNiaCobMcRdO2, wherein R is a doping element, x is larger than 0.95 and smaller than 1.15, a is larger than 0.60 and smaller than 0.85, b is larger than 0 and smaller than 0.2, c is larger than 0 and smaller than 0.2, the sum of a, b and c is larger than or equal to 0.98 and smaller than or equal to 1.00, d is larger than or equal to 0 and smaller than or equal to 0.1, and M is Mn or Al. The high-nickelternary positive electrode material has high particle size consistency, and the physical performance and electrochemical performance of a high-nickel lithium-ion secondary battery can be effectivelyimproved.

Description

technical field [0001] The invention relates to the field of lithium-ion power batteries, in particular to a high-nickel ternary positive electrode material with high electrical performance consistency and a preparation method and application thereof. Background technique [0002] Due to the advantages of high energy density, high working voltage and long cycle life, lithium-ion secondary batteries are widely used as power sources for various mobile devices, energy storage power stations, and even in aviation, aerospace, navigation, automobiles, medical equipment, etc. Gradually replace other traditional batteries in the field. [0003] As lithium battery electric vehicles that have appeared in recent years (such as the Prius produced by Toyota Corporation of Japan, the Tesla electric vehicle produced by Tesla Motors of the United States, etc., the F6 iron battery electric vehicle produced by BYD Company, and the electric buses launched in various places in recent years etc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/485H01M4/505H01M4/525H01M10/0525
CPCY02E60/10
Inventor 赵孝连曾国城杨亮亮李诗文农廷峰
Owner 高点(深圳)科技有限公司
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