Preparation methods of lithium nickel cobalt aluminum oxide and composite material thereof

A technology of nickel cobalt lithium aluminate and composite materials, which is applied to active material electrodes, electrical components, electrochemical generators, etc., can solve problems such as easy water absorption, and achieve the effect of simple operation in the preparation process and easy large-scale industrial production.

Inactive Publication Date: 2018-07-20
LONG POWER SYST NANTONG CO LTD
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Problems solved by technology

[0007] Based on the above-mentioned NCA nickel-cobalt lithium aluminate material, it is necessary to solve the problem that the traditional NCA nickel-cobalt lithium aluminate battery is easy to absorb water and difficult to process in the battery manufacturing process. Nickel Cobalt Lithium Aluminate LiNi 1-x-y co x al y m z o 2+z Composite material and its preparation method

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  • Preparation methods of lithium nickel cobalt aluminum oxide and composite material thereof

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preparation example Construction

[0032] Lithium nickel cobalt aluminate LiNi of an embodiment 1-x-y co x al y m z o 2+z A method for preparing a composite material, comprising the steps of:

[0033] (1) dissolving the soluble nickel salt and the soluble cobalt salt in the first solvent and mixing to obtain the first mixed solution;

[0034] Preferably, in the first mixed solution, the molar ratio of nickel to cobalt is 6˜9:1. Soluble nickel salts include nickel nitrate and nickel chloride. Soluble cobalt salts include cobalt nitrate and cobalt chloride. The solvent in the first mixed solution is deionized water. The total concentration of solute in the first mixed solution is preferably 1mol / L;

[0035] (2) Prepare lithium compound solution, soluble aluminum salt solution and soluble metal M salt solution respectively, wherein metal M is selected from at least one of Mg, Be, Ca, Sr, Ba, Si, Zn, Y, Ga and In ; The order of preparing the above-mentioned first mixed solution and lithium compound solutio...

Embodiment 1

[0050] (1) 130.02g of Ni(NO3)2.6H2O and 15.385g of Co(NO3)2.6H2O were dissolved in deionized water to form a homogeneous 1mol / L first mixed solution.

[0051] (2) Dissolving 15.385 g of Co(NO3)2.6H2O in deionized water to form a homogeneous 1 mol / L solution.

[0052] (3) 5.92g of Al(NO3)3.9H2O was dissolved in deionized water to form a homogeneous 1mol / L solution.

[0053] (4), 2.695g of Mg(NO3)2 was dissolved in deionized water to form a homogeneous 1mol / L solution.

[0054] (5), 37.89g of LiNO3 was dissolved in deionized water to form a homogeneous 1mol / L solution.

[0055] (6), according to the chemical formula is LiNi0.85Co0.1Al0.05Mg0.03O2.03, the solution obtained in (2), (3), (4) and (5) is mixed uniformly to obtain the second mixed solution, then ( The first mixed solution obtained in 1) is slowly added dropwise to the second mixed solution, and the dropping time is 60 minutes. After obtaining a homogeneous solution, it is spray-dried to obtain a powdery uniformly dr...

Embodiment 2

[0061] (1) 130.02g of Ni(NO3)2.6H2O and 15.385g of Co(NO3)2.6H2O were dissolved in deionized water to form a homogeneous 1mol / L first mixed solution.

[0062] (2) Dissolving 15.385 g of Co(NO3)2.6H2O in deionized water to form a homogeneous 1 mol / L solution.

[0063] (3) 5.92g of Al(NO3)3.9H2O was dissolved in deionized water to form a homogeneous 1mol / L solution.

[0064] (4), 2.695g of Mg(NO3)2 was dissolved in deionized water to form a homogeneous 1mol / L solution.

[0065] (5), 37.89g of LiNO3 was dissolved in deionized water to form a homogeneous 1mol / L solution.

[0066] (6), according to the chemical formula is LiNi0.85Co0.08Al0.07Mg0.01O2.01, the solution obtained in (2), (3), (4) and (5) is mixed uniformly to obtain the second mixed solution, then ( The first mixed solution obtained in 1) is slowly added dropwise to the second mixed solution, and the dropping time is 90 minutes. After obtaining a homogeneous solution, spray dry to obtain a powdery uniformly dried mix...

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Abstract

The invention discloses a lithium nickel cobalt aluminum oxide LiNi<1-x-y>Co<x>Al<y>M<z>O<2+z> and a hydrophobic material coating the surface of the NCA lithium nickel cobalt aluminum oxide, wherein xis smaller than or equal to 0.15 and greater than or equal to 0.08, y is smaller than or equal to 0.1 and greater than or equal to 0.03, z is smaller than or equal to 0.2 and greater than or equal to0.01, and the lithium nickel cobalt aluminum oxide is NCA for short. The hydrophobic material coats the surface of the NCA lithium nickel cobalt aluminum oxide, so that the coating material is insoluble in water and has electrolyte resistance. Compared with a traditional NCA lithium nickel cobalt aluminum oxide material, the lithium nickel cobalt aluminum oxide LiNi<1-x-y>Co<x>Al<y>M<z>O<2+z> hasthe advantage that the composite material of the lithium nickel cobalt aluminum oxide LiNi<1-x-y>Co<x>Al<y>M<z>O<2+z> is capable of solving the problem that a lithium nickel cobalt aluminum oxide battery easily absorbs water. The invention further discloses a preparation method of the composite material of the lithium nickel cobalt aluminum oxide LiNi<1-x-y>Co<x>Al<y>M<z>O<2+z>.

Description

technical field [0001] The invention relates to the technical field of batteries, in particular to the technical field of lithium-ion batteries, in particular to a preparation method of a nickel-cobalt-lithium-aluminate composite material and a preparation method thereof. Background technique [0002] The electrochemical performance of lithium-ion batteries mainly depends on the structure and properties of the electrode materials and electrolyte materials used, especially the structure and properties of the electrode materials. Among them, commercial positive electrode materials such as lithium cobalt oxide, lithium manganese oxide, lithium iron phosphate, and nickel-cobalt-manganese ternary system, among which LiCoO2 has high voltage, stable discharge, and good thermal stability, but has anti-overcharge ability and poor safety. , cobalt materials are expensive, lack of resources and serious pollution. LiMn2O4 is cheap, rich in manganese resources, and excellent in safety, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/525H01M4/485H01M4/62H01M10/0525
CPCH01M4/366H01M4/485H01M4/525H01M4/62H01M10/0525H01M2004/021H01M2004/028Y02E60/10
Inventor 黄碧英丁孔贤黄耀泽吴曲勇
Owner LONG POWER SYST NANTONG CO LTD
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