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Method for preparing ternary cathode material NCA of lithium ion battery

A technology for lithium-ion batteries and positive electrode materials, which is applied to battery electrodes, positive electrodes, electrical components, etc., can solve the problems of large loss of cycle capacity and poor structural stability, and achieve good product quality, less waste of raw materials, and better process control Effect

Inactive Publication Date: 2018-02-23
福建金山锂科新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantages are mainly the large loss of the first cycle capacity and the relatively poor structural stability of the material, the thermal stability and safety need to be further improved, and the electrode processing performance needs to be further improved

Method used

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  • Method for preparing ternary cathode material NCA of lithium ion battery
  • Method for preparing ternary cathode material NCA of lithium ion battery
  • Method for preparing ternary cathode material NCA of lithium ion battery

Examples

Experimental program
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Effect test

Embodiment 1

[0026] Prepare 800 mL of 1mol / L nickel sulfate, 150 mL of 1mol / L cobalt sulfate, and 50 mL of 1mol / L aluminum sulfate solution, mix the cobalt sulfate and aluminum sulfate solutions evenly, and then add the template agent spherical activated carbon to the mixed solution , the template agent is spherical activated carbon, wherein the specific surface area of ​​activated carbon and high specific surface is greater than 1000m 2 / g, the added template mass is 0.15% of the mass fraction of the prepared precursor, fully stirred for 2 hours, then added nickel sulfate solution to the mixed solution, and finally mixed 1L of precipitant solution 2mol / L sodium hydroxide solution with The mixed solution is put into the reaction kettle together to carry out reaction and precipitation, and after the full reaction, it is allowed to stand for aging. After the aging treatment, the solid material is washed and vacuum-dried to obtain the NCA precursor of the ternary positive electrode material; ...

Embodiment 2

[0029] Prepare 800 mL of 1mol / L nickel chloride, 130 mL of 1mol / L cobalt chloride, and 70 mL of 1mol / L aluminum chloride solution, mix the cobalt chloride and aluminum chloride solutions evenly, and then add the template agent spherical activated carbon Added to the mixed solution, the template agent is a high specific surface adsorption resin with a specific surface area greater than 1000m 2 / g, the added template mass is 1% of the mass fraction of the prepared precursor, fully stirred for 8 hours, then added the nickel chloride solution to the mixed solution, and finally the precipitant solution 2.3mol / L sodium hydroxide solution 1L and the mixed solution flow together into the reaction kettle for reaction and precipitation. After full reaction, let it stand for aging. After the aging treatment, the solid material is washed and vacuum-dried to obtain the NCA precursor of the ternary cathode material;

[0030] The NCA precursor of the obtained ternary positive electrode mater...

Embodiment 3

[0032] Prepare 800 mL of 1mol / L nickel carbonate, 160 mL of 1mol / L cobalt carbonate, and 40 mL of 1mol / L aluminum carbonate solution, mix the cobalt carbonate and aluminum carbonate solutions evenly, and then add the template agent spherical activated carbon to the mixed solution , the template agent is spherical activated carbon, wherein the specific surface area of ​​activated carbon and high specific surface is greater than 1000m 2 / g, the added template quality is 5% of the mass fraction of the prepared precursor, fully stirred for 3 hours, then the nickel carbonate solution was added to the mixed solution, and finally the precipitant solution 1.5mol / L sodium hydroxide solution 1L and the mixed solution flow together into the reaction kettle for reaction and precipitation. After full reaction, let it stand for aging. After the aging treatment, the solid material is washed and vacuum-dried to obtain the NCA precursor of the ternary cathode material;

[0033] The NCA precurs...

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Abstract

The invention provides a method for preparing a ternary cathode material NCA of a lithium ion battery. The method comprises the following steps: (1) preparing an NCA precursor, namely preparing nickelsalt, cobalt salt and aluminum salt solutions, uniformly mixing the cobalt salt and aluminum salt solutions, adding a spherical template agent into the mixed solution, adding the nickel salt into themixed solution, adding a precipitator solution and the mixed solution in concurrent flow into a reactor so as to react and precipitate, fully reacting, standing, aging, washing the solids after agingtreatment, and performing vacuum drying so as to obtain the NCA precursor; (2) preparing an NCA material, namely fully mixing the NCA precursor of the ternary material and a lithium source, sintering, and crushing the sintered material, thereby obtaining the needed ternary cathode material NCA. Compared with the traditional process, the method disclosed by the invention has the advantages of being uniform in element distribution, short in process time, well controllable in process, simple in operation, environmental-friendly, low in equipment requirements, less in waste of raw materials, highin product quality and the like.

Description

technical field [0001] The invention belongs to the field of energy storage materials and electrochemistry, and relates to a preparation method of NCA, a ternary positive electrode material for lithium ion batteries Background technique [0002] The development trend of electric vehicle EV and hybrid electric vehicle HEV is very rapid. Among them, the power battery as the vehicle power has attracted much attention. Lithium-ion batteries have become the first choice for power batteries because of their high energy density, excellent cycle life, no memory effect, low self-discharge rate, and low pollution. In the development process of lithium-ion batteries, the positive electrode material is always a key factor. In recent years, the ternary cathode material NCA has the potential to be widely used as the cathode material for lithium-ion batteries. The main advantages of NCA as a cathode material for lithium-ion batteries are: a relatively stable discharge platform and high ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/525H01M4/485H01M10/0525
CPCH01M4/485H01M4/505H01M4/525H01M10/0525H01M2004/021H01M2004/028Y02E60/10
Inventor 于伟谢海军王兆雄
Owner 福建金山锂科新材料有限公司
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