A kind of nickel hydroxide precursor and its preparation method, positive electrode material

A technology of nickel hydroxide and precursors, applied in the direction of nickel compounds, chemical instruments and methods, positive electrodes, etc., can solve the problems of increased particle specific surface area, difficulty in controlling the number of nucleation, aggravated agglomeration, etc., to reduce the pH value , Product quality is stable, and the effect of avoiding the cost of impurity removal

Active Publication Date: 2021-08-10
JINCHI ENERGY MATERIALS CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the initial nucleation stage of the reaction, the specific surface area of ​​the particles increases due to oxidation, resulting in aggravated agglomeration, and it is difficult to control the number of nucleates.

Method used

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  • A kind of nickel hydroxide precursor and its preparation method, positive electrode material
  • A kind of nickel hydroxide precursor and its preparation method, positive electrode material
  • A kind of nickel hydroxide precursor and its preparation method, positive electrode material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The preparation of nickel hydroxide precursor comprises the following steps:

[0034] (1) Ni according to the molecular formula 0.88 co 0.09 mn 0.03 (OH) 2 Ingredients, nickel sulfate, cobalt sulfate, and manganese sulfate are prepared into a mixed salt solution with a total metal ion concentration of 2mol / L according to the molar ratio of nickel, cobalt, and manganese being 0.88:0.09:0.03.

[0035](2) Add deionized water into the reaction kettle with a volume of 1m³, control the stirring speed at 280r / min, raise the temperature to 67.5°C, add ammonia water and sodium hydroxide solution into the reaction kettle to form the bottom liquid of the reaction kettle; make the reaction The concentration of ammonia water in the bottom liquid was 12g / L, the pH value was adjusted to 11.80, and nitrogen gas was continuously fed for 3 hours before feeding.

[0036] (3) Under the atmosphere of nitrogen protection, the mixed salt solution in step (1), the precipitating agent with ...

Embodiment 2

[0043] The preparation of nickel hydroxide precursor comprises the following steps:

[0044] (1) Ni according to the molecular formula 0.70 co 0.05 mn 0.25 (OH) 2 Ingredients, nickel sulfate, cobalt sulfate, and manganese sulfate are prepared into a mixed salt solution with a total ion concentration of 2.2mol / L according to the molar ratio of nickel, cobalt, and manganese being 0.70:0.05:0.25.

[0045] (2) Add deionized water into the reaction kettle with a volume of 100L, control the stirring speed at 300r / min, raise the temperature to 60°C, add ammonia water and sodium hydroxide solution into the reaction kettle to form the bottom liquid of the reaction kettle; make the reaction The concentration of ammonia water in the bottom liquid was 10g / L, the pH value was adjusted to 11.50, and nitrogen gas was continuously fed for 3 hours before feeding.

[0046] (3) Under the atmosphere of nitrogen protection, the mixed salt solution in step (1), the precipitating agent with a co...

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Abstract

The invention belongs to the technical field of lithium-ion battery materials, and specifically discloses a nickel-containing hydroxide precursor, a preparation method thereof, and a positive electrode material. In the process of preparing the nickel-containing hydroxide precursor, nitrogen protection is used to effectively control the number of nucleation at the initial stage of the reaction, and then air (oxygen) is introduced to oxidize, and the primary particle morphology of the prepared product is regular lath shape , and is characterized by loose vertical arrangement, which meets the sintering requirements of single crystal cathode materials. The positive electrode material obtained by mixing and roasting the precursor and the lithium source can control the total amount of soluble lithium in the positive electrode material to ≤1500ppm without washing. While reducing the production cost, it also avoids the impurity removal cost and environmental protection caused by washing the material. Negative impacts such as pollution costs.

Description

technical field [0001] The invention belongs to the technical field of lithium-ion battery materials, and in particular relates to a high-nickel hydroxide precursor, a preparation method thereof, and a positive electrode material. Background technique [0002] Lithium-ion secondary batteries are becoming more and more important in people's lives, and have been widely used as a source of portable electricity. Lithium-ion batteries have high voltage, high specific energy, long charge and discharge life, no memory effect, and no pollution. , fast charging, low self-discharge rate, wide operating temperature range and safety and reliability. With the country's emphasis on environmental protection and the increasing urgency of industrial upgrading, the new energy industry is ushering in a good opportunity for development. At the technical level of new energy vehicles, batteries are the most concerned core components of new energy vehicles. Around this component, how to increase ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G53/00H01M4/505H01M4/525H01M10/0525
CPCC01G53/006C01P2004/03H01M4/505H01M4/525H01M10/0525H01M2004/021H01M2004/028Y02E60/10
Inventor 刘庭杰张海艳胡志兵李玉云熊意球黎力朱璟胡海诗刘玮
Owner JINCHI ENERGY MATERIALS CO LTD
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