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Method for preparing high-density lithium ion battery anode material-lithium nickel manganese cobalt and special calcinator

A technology of nickel-cobalt lithium manganese oxide and lithium-ion batteries, which is applied in the field of preparation of lithium-ion battery cathode materials, can solve the problems of difficulty in obtaining materials without impurity phases, difficulty in uniform particle and appearance, and material capacity attenuation. Excellent chemical properties, simple process and high tap density

Inactive Publication Date: 2015-04-29
杭州金马新能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The technical problem to be solved in the present invention is to provide a preparation method of nickel-cobalt lithium manganese oxide, a positive electrode material of a high-density lithium-ion battery, which mainly solves the problem of using a single physical-mechanical mixing method in the prior art, which will inevitably lead to the inconsistency of the material. Uniformity, it is difficult to obtain materials without impurities, the particles and appearance are also difficult to be uniform, and the capacity of the material decays quickly and other technical problems

Method used

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  • Method for preparing high-density lithium ion battery anode material-lithium nickel manganese cobalt and special calcinator
  • Method for preparing high-density lithium ion battery anode material-lithium nickel manganese cobalt and special calcinator
  • Method for preparing high-density lithium ion battery anode material-lithium nickel manganese cobalt and special calcinator

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Experimental program
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Embodiment 1

[0040] Embodiment 1: the preparation method of a kind of high-density lithium-ion battery anode material nickel-cobalt lithium manganese oxide of this example, its steps are:

[0041] a. Prepare NH 4+ Ammonium salt aqueous solution A with a concentration of 3mol / L; prepare NaOH alkaline solution B with a concentration of 2mol / L; prepare a molar ratio of Ni:Co:Mn=1:1:1, and a total metal ion concentration of 1mol / L nitric acid Nickel, cobalt nitrate, manganese nitrate mixed metal ion mixed aqueous solution C;

[0042] b. First add 5L of B solution to the reaction kettle, and then NH solution according to the molar ratio 4+ / (Ni+Co+Mn)=4:1 Add A and C, add B solution to control the pH value in the reactor to 12, the reaction temperature is 85°C, fully age for 20 hours after the reaction, and keep it in the process The pH value remains unchanged, and the precursor is obtained after washing and drying (Ni 1 / 3 co 1 / 3 mn 1 / 3 ) (OH) 2 ;

[0043] c. Mix LiOH and the precurso...

Embodiment 2

[0051] Embodiment 2: the preparation method of a kind of high-density lithium-ion battery cathode material nickel cobalt lithium manganese oxide of this example, its steps are:

[0052] a. Prepare NH 4+ Ammonium salt solution A with a concentration of 4 mol / L; prepare NaOH alkaline solution B with a concentration of 2 mol / L; prepare a molar ratio of Ni:Co:Mn=5:2:3, and a total metal ion concentration of 0.8 mol / L Nickel sulfate, cobalt sulfate, manganese sulfate mixed metal ion mixed aqueous solution C;

[0053] b. First add 6L of B solution into the reactor, and then make NH according to the molar ratio 4+ / (Ni+Co+Mn)=8:1 Add A and C, add B solution to control the pH value in the reactor to 10, the reaction temperature is 75°C, fully age for 23 hours after the reaction, and maintain the pH during the process The value remains unchanged, and the precursor is obtained after washing and drying (Ni 0.5 co 0.2 mn 0.3 ) (OH) 2 ;

[0054] c. Will Li 2 CO 3 Take a total o...

Embodiment 3

[0062] Embodiment 3: the preparation method of a kind of high-density lithium-ion battery cathode material nickel cobalt lithium manganese oxide of this example, its steps are:

[0063] a. Prepare NH 4+ Ammonium salt solution A with a concentration of 8 mol / L; prepare NaOH alkaline solution B with a concentration of 8 mol / L; prepare a molar ratio of Ni:Co:Mn=5:2:3, and a total metal ion concentration of 3 mol / L sulfuric acid Nickel, cobalt sulfate, manganese sulfate mixed metal ion mixed aqueous solution C;

[0064] b. First add 8L of B solution into the reactor, and then make NH solution according to the molar ratio 4+ / (Ni+Co+Mn)=4:1 Add A and C, add B solution to control the pH value in the reactor to 11.5, the reaction temperature is 90°C, fully age for 18 hours after the reaction, and maintain the pH during the process The value remains unchanged, and the precursor is obtained after washing and drying (Ni 0.5 co 0.2 mn 0.3 ) (OH) 2 ;

[0065] c. Will Li 2 CO 3...

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Abstract

The invention relates to a method for preparing a lithium ion battery anode material, in particular to a method for preparing a high-density lithium ion battery anode material-lithium nickel manganese cobalt. The method mainly solves the problems that in the prior art, a single physical and mechanical mixing mode is adopted to inevitably result in nonhomogeneity of materials, the materials without impurity phases are difficult to obtain, the particles and appearances are difficult in uniformity, the cycling performance of the materials is poor, and the like. The method disclosed by the invention comprises the following steps of: firstly preparing ammonium salt aqueous solution A, alkaline solution B and nickel manganese cobalt and metal ion mixed aqueous solution C; adding a certain amount of alkaline solution B to a reaction kettle; then adding ammonium salt aqueous solution A, alkaline solution B and nickel manganese cobalt and metal ion mixed aqueous solution C; reacting and aging to obtain a multivariate composite material precursor; mixing lithium salt with the precursor; cooling the mixture after pre-sintering; mixing again; slowly cooling the mixture under oxygen atmosphere after roasting at high temperature; and screening by stages to obtain the product.

Description

technical field [0001] The invention relates to a preparation method of a positive electrode material of a lithium ion battery, in particular to a preparation method of a high density lithium ion battery positive electrode material nickel cobalt lithium manganese oxide and a special roasting furnace. Background technique [0002] In today's society, portable electronic devices, such as cameras, mobile phones, notebooks, especially tablet computers, etc., have led the trend of today's society and have become the mainstream of today's society. Almost everyone now has several portable electronic devices, all of which are inseparable from the development of lithium-ion batteries. Especially in the past two decades, with the development of lithium-ion batteries, the use time of electronic equipment on a single charge has been greatly extended. Compared with other secondary batteries, lithium-ion batteries have the advantages of high energy density, high voltage, low environmenta...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/505H01M4/525F27B7/06F27B7/20
CPCY02E60/10
Inventor 胡东阁余爱水王叶滔王张志娄永文
Owner 杭州金马新能源科技有限公司
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