Doped and modified high-nickel quaternary positive electrode material, and preparation method and application thereof

A positive electrode material and high-nickel technology, applied in chemical instruments and methods, electrical components, battery electrodes, etc., can solve problems such as poor cycle performance and electrochemical stability, high production cost of lithium cobalt oxide, and low specific energy of batteries , to achieve the effects of improving cycle performance and safety performance, light weight, and improving the development of crystal forms

Inactive Publication Date: 2019-04-23
LIONANOCHINAINC +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The positive electrode materials of ion batteries that we are familiar with mainly include lithium cobalt oxide, lithium nickel oxide, lithium manganese oxide, ternary materials, and lithium iron phosphate, etc. However, due to the lack of cobalt resources and high toxicity, the production cost of lithium cobalt oxide is high. However, its cycle performance is poor, which limits its industrial application; lithium manganese oxide has It has the advantages of rich resources, low cost, no pollution, good safety, and good rate performance, but its cycle performance and electrochemical stability are

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  • Doped and modified high-nickel quaternary positive electrode material, and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0048]A kind of high-nickel quaternary cathode material precursor, chemical formula is Ni 0.815 co 0.15 Al 0.0175 mn 0.0175 (OH) 2 , its preparation method is:

[0049] Step (a), calculate and weigh soluble nickel salt, soluble cobalt salt, soluble aluminum salt and soluble manganese salt according to the molar ratio of each element Ni: Co: Al: Mn=0.815: 0.15: 0.0175: 0.0175; add them together Mix in deionized water to prepare 0.5mol / L solution A;

[0050] Step (b), adding sodium tartrate to deionized water is mixed with solution B of 0.05mol / L;

[0051] Step (c), adding sodium hydroxide to deionized water to prepare a solution C of 1mol / L;

[0052] Step (d), control the reaction temperature of the system at 40°C, add solution A, solution B and solution C into the reactor, control the stirring speed to 800 rpm, and adjust the pH of the mixed solution to 7.5, and carry out coprecipitation reaction for 3 hours Afterwards, the precipitate is filtered, washed, and dried, wh...

Embodiment 2

[0054] A kind of high-nickel quaternary cathode material precursor, chemical formula is Ni 0.815 co 0.15 Al 0.014 mn 0.021 (OH) 2 , its preparation method is:

[0055] Step (a), calculate and weigh soluble nickel salt, soluble cobalt salt, soluble aluminum salt and soluble manganese salt according to the molar ratio of each element Ni: Co: Al: Mn=0.815:0.15:0.014:0.021; add them together Mix in deionized water to prepare 1mol / L solution A;

[0056] Step (b), adding ammonia water to deionized water to prepare 0.2mol / L solution B;

[0057] Step (c), adding sodium hydroxide to deionized water to prepare a solution C of 2mol / L;

[0058] Step (d), control the reaction temperature of the system at 40°C, add solution A, solution B and solution C to the reactor, control the stirring speed to 750 rpm, and adjust the pH of the mixed solution to 7.0, and carry out coprecipitation reaction for 3 hours Afterwards, the precipitate is filtered, washed, and dried, wherein the drying te...

Embodiment 3

[0060] A kind of high-nickel quaternary cathode material precursor, chemical formula is Ni 0.815 co 0.15 Al 0.021 mn 0.014 (OH) 2 , its preparation method is:

[0061] Step (a), calculate and weigh soluble nickel salt, soluble cobalt salt, soluble aluminum salt and soluble manganese salt according to the molar ratio of each element Ni: Co: Al: Mn = 0.815: 0.15: 0.021: 0.014; add them together Mix in deionized water to prepare 2mol / L solution A;

[0062] Step (b), adding sodium tartrate to deionized water is mixed with solution B of 0.05mol / L;

[0063] Step (c), adding potassium hydroxide to deionized water to prepare a solution C of 1mol / L;

[0064] Step (d), control the reaction temperature of the system at 40°C, add solution A, solution B and solution C into the reactor, control the stirring speed to 800 rpm, and adjust the pH of the mixed solution to 7.5, and carry out coprecipitation reaction for 3 hours Afterwards, the precipitate is filtered, washed, and dried, wh...

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Abstract

The invention provides a doped and modified high-nickel quaternary positive electrode material, and a preparation method and application thereof. The chemical formula of the material is (LiaNi1-x-y-zCoxAlyMnz)1-bMbO2, x)0,y)0,1-x-y) 0, wherein the z is larger than 0.01 but smaller than 0.05, the a is larger than or equal to 1 but smaller than or equal to 1.1, and the b is larger than 0 but smallerthan or equal to 0.01. The doped and modified high-nickel quaternary positive electrode material synthesized by the preparation method has excellent cycle performance. The preparation method is simple in technique, controllable in process and liable to industrialized mass production.

Description

technical field [0001] The invention relates to the field of electrode materials, in particular to a doped and modified high-nickel quaternary positive electrode material, a preparation method and an application. Background technique [0002] As a new type of green energy, lithium-ion batteries have the advantages of high specific energy, small self-discharge, high open circuit voltage, no memory effect, long cycle life, and no environmental pollution, so they are widely used in mobile phones, notebook computers, digital cameras, etc. At the same time, lithium-ion batteries are also power sources for electric vehicles and energy storage power sources for solar renewable energy. The positive electrode materials of ion batteries that we are familiar with mainly include lithium cobalt oxide, lithium nickel oxide, lithium manganese oxide, ternary materials, and lithium iron phosphate, etc. However, due to the lack of cobalt resources and high toxicity, the production cost of lit...

Claims

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Application Information

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IPC IPC(8): C01G53/00H01M4/485H01M4/505H01M4/525H01M10/0525
CPCC01G53/006C01P2006/40H01M4/485H01M4/505H01M4/525H01M10/0525Y02E60/10
Inventor 沈赟于英超任东方艳
Owner LIONANOCHINAINC
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