Doped positive electrode material precursor and preparation method and application thereof, doped positive electrode material and preparation method and application thereof

A positive electrode material and doping technology, applied in chemical instruments and methods, battery electrodes, inorganic chemistry, etc., can solve the problems of low particle strength and failure to meet actual needs, and achieve low process cost, high reliability of results, and realization of low difficulty effect

Active Publication Date: 2021-05-14
BEIJING EASPRING MATERIAL TECH CO LTD +1
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Problems solved by technology

[0011] The object of the present invention is to provide a doped positive electrode material precursor, its preparation method and application, and a doped positive electrode material precursor in order to overcome the problem that the particle strength of the positive electrode material for lithium ion batteries in the prior art is low and cannot meet the actual needs. The positive electrode material and its preparation m

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  • Doped positive electrode material precursor and preparation method and application thereof, doped positive electrode material and preparation method and application thereof
  • Doped positive electrode material precursor and preparation method and application thereof, doped positive electrode material and preparation method and application thereof
  • Doped positive electrode material precursor and preparation method and application thereof, doped positive electrode material and preparation method and application thereof

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[0047]The first aspect of the present invention provides a method of preparing a precursor of a doping type positive electrode material, wherein the method comprises the steps of:

[0048](1) Configure the nickel salt, cobalt salt, and manganese salts as a mixed salt solution; the precipitant, complexing agent, and doping elements are arranged in solution;

[0049](2) In an inert atmosphere, the mixed salt solution obtained by step (1), the precipitant solution, a complexing agent solution, and the complex reactive reaction are started;

[0050](3) At different stages of the co-precipitation reaction process according to step (2), the doping element solution is added to the reaction kettle in a different stage, and a coprecipitation reaction is carried out to obtain a doped nickel-cobalt manganese hydroxide. 2 ≤ N ≤ 5;

[0051](4) The doped nickel cobalt-manganese hydroxide obtained by step (3) is washed, dried to obtain the precursor of the doped positive electrode material.

[0052]In the presen...

Example Embodiment

[0134]Example 1

[0135]Preparation of 1.5 mol / L of Ni-Nickel-manganese sulfate mixed solution (molar ratio Ni: CO: Mn = 50: 20: 30), 3 mol / L NaOH solution, 3 mol / L of ammonia water, the above solutions will be subjected to and flow In the form of a reaction, the reaction temperature is maintained at 50 ° C, the reaction pH 11, in a nitrogen protection atmosphere, the synthesis reaction is activated, and the total reaction time is set to 200 h. When the reaction is carried out to 60h, 3 g / L of titanium sulfate (Ti (SO) is added to 3 g / L (Ti (SO) in the total amount of nickel cobalt manganese sulfuric acid mixed salt.4)2· 9h2O) Solution, conduct a coprecipitation reaction; when the reaction is carried out to 140 h, the total amount of molar molar of nickel cobalt manganese sulfuric acid is added to 5 g / L sodium aluminate (Naalo)2Solution, a coprecipitation reaction. After 200 h, it was washed, dried 120 ° C, sieved, to obtain the desired doping multi-nickel-cobalt manganese ...

Example Embodiment

[0140]Example 2

[0141]The mixed solution of 1.8 mol / L of nickel-cobalt nitrate (molar ratio Ni: CO: Mn = 63: 17: 20), 5 mol / L NaOH solution, 5 mol / L of ammonia water, the above solutions will be subjected to and flow In the form of the reaction, the reaction temperature is maintained at 55 ° C, the reaction pH 11.5, in a nitrogen protection atmosphere, the synthesis reaction is activated, and the total reaction time is set to 180 h. When the reaction is carried out to 36 h, 4 g / L zirconium sulfate (Zr (SO) is added to 4 g / L (ZR (SO) in the total amount of Nickel cobalt manganese sulfuric acid mixed salt.4)2· 4h2O) Solution, perform a coprecipitation reaction; 10 g / L nitrate (Sr (SR (NO), which is 2 g / l nitrate in the mixed salt of Nickel cobalt sulfate (SR (NO) in the reaction to 72 h.3)2The solution is carried out, and the total amount of 12 g / L nitrate (Ba (BA (NO) is added to the total amount of molar molar of nickel cobalt sulfuric acid mixed sal Salt.3)2Solution,...

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Abstract

The invention relates to the field of lithium ion batteries, and discloses a doped positive electrode material precursor and a preparation method and application thereof, and a doped positive electrode material and a preparation method and application thereof. The preparation method comprises the following steps: (1) preparing nickel salt, cobalt salt and manganese salt into a mixed salt solution; and respectively preparing a precipitant, a complexing agent and a doping element into solutions; (2) in an inert atmosphere, adding the mixed salt solution, the precipitant solution and the complexing agent solution into a reaction kettle for reaction; and (3) at different stages of the reaction, adding the doped element solution into the reaction kettle for n times for reaction to obtain a doped nickel-cobalt-manganese hydroxide, and washing and drying to obtain the doped positive electrode material precursor. Specific doping elements are added in different stages of wet synthesis, and the growth path and the internal structure of a precursor are directionally controlled; and sintering reaction is carried out on the precursor with the reinforced structure type and lithium salt to obtain a lithium ion battery positive electrode material finished product with relatively high particle strength.

Description

technical field [0001] The invention relates to the field of lithium ion batteries, in particular to a doped positive electrode material precursor and its preparation method and application, doped positive electrode material and its preparation method and application. Background technique [0002] Since its inception in 1990, lithium-ion batteries have been widely researched and applied due to their advantages such as high open circuit voltage, high specific energy, long service life, no memory, and small self-discharge. With the progress and development of lithium-ion battery technology, currently, lithium-ion batteries are not only widely used in various portable electronic products, but also actively expand to the fields of electric vehicles, medical supplies, aerospace and national defense. Cathode material is one of the important components of lithium-ion batteries. With the continuous evolution and development of lithium battery materials and the market demand for high...

Claims

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Application Information

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IPC IPC(8): C01G53/00H01M4/485H01M4/505H01M4/525H01M10/0525
CPCC01G53/006H01M4/505H01M4/525H01M4/485H01M10/0525C01P2006/40C01P2006/12C01P2004/61C01P2004/03Y02E60/10
Inventor 孙立国张永强宋顺林刘亚飞陈彦彬
Owner BEIJING EASPRING MATERIAL TECH CO LTD
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