Method for preparing Co-Ni-Mn ternary anode materials by microwave sintering

A cathode material and microwave sintering technology, which is applied in the field of preparing lithium-ion battery manganese-cobalt-nickel ternary cathode materials by microwave sintering, can solve problems such as high cost and poor performance, and achieve low production cost, reduced synthesis time, and simple process control. Effect

Inactive Publication Date: 2011-02-09
HENAN UNION NEW ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to overcome the disadvantages of high cost and poor performance of the manganese-cobalt-nickel ternary positive electrod

Method used

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  • Method for preparing Co-Ni-Mn ternary anode materials by microwave sintering
  • Method for preparing Co-Ni-Mn ternary anode materials by microwave sintering
  • Method for preparing Co-Ni-Mn ternary anode materials by microwave sintering

Examples

Experimental program
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Effect test

Embodiment 1

[0031] Embodiment one: Li-ion battery ternary cathode material LiNi 1 / 3 co 1 / 3 mn 1 / 3 o 2 preparation method

[0032] (1) 5800 g of MnO 2 , 6100g Ni(OH) 2 and 4900 grams of CoO are added to the mixer, and stirred evenly to obtain MnO 2 , Ni(OH) 2 Mixture A with CoO;

[0033] (2) Dissolve 2,000 grams of glucose in 15,200 mL of pure water, and stir evenly to obtain an aqueous solution of glucose;

[0034] (3) 7500 grams of Li 2 CO 3 Add to the above aqueous glucose solution, stir evenly to obtain mixture B;

[0035] (4) Add mixture B to mixture A and stir evenly to obtain a paste precursor;

[0036] (5) Add the paste precursor into the silicon carbide crucible, put the silicon carbide crucible into an industrial microwave oven, raise the temperature to 780°C at a rate of 10°C per minute, and keep it for 20 minutes to obtain the positive electrode material LiNi 1 / 3 co 1 / 3 mn 1 / 3 o 2 .

[0037] (where Li 2 CO 3 Molecular weight 73.80, MnO 2 Molecular weight 86.9...

Embodiment 2

[0039] Embodiment two: Li-ion battery ternary cathode material LiNi 1 / 3 co 1 / 3 mn 1 / 3 o 2 preparation method

[0040] (1) 5600 g of MnO 2 , 6000g Ni(OH) 2 Add 4800 grams of CoO to a mixer (or ball mill) and mix, and stir evenly to obtain mixture A;

[0041] (2) Dissolve 3,800 grams of sucrose in 19,000 mL of pure water, and stir evenly to obtain an aqueous solution of sucrose;

[0042] (3) 8400 g of LiOH·H 2 O is added to the sucrose aqueous solution and stirred evenly to obtain the mixture B;

[0043] (4) Mix the mixtures A and B, and stir evenly to obtain a paste precursor;

[0044] (5) Put the paste precursor into a kraft paper container, put the kraft paper container into an industrial microwave oven, raise the temperature to 820 °C at a rate of 8 °C per minute, and keep it for 40 minutes to obtain the positive electrode material LiNi 1 / 3 co 1 / 3 mn 1 / 3 o 2 .

[0045] (where LiOH·H 2 O molecular weight 41.96, MnO 2 Molecular weight 86.94, Ni(OH) 2 The mole...

Embodiment 3

[0047] Embodiment three: Li-ion battery ternary cathode material LiNi 1 / 3 co 1 / 3 mn 1 / 3 o 2 preparation method

[0048] (1) 5600 g of MnO 2 , 5200g Ni 2 o 3 and 5200 g Co 2 o 3 Add a ball mill and mix evenly to obtain mixture A;

[0049] (2) Dissolve 2,000 grams of glucose and 1,000 grams of oxalic acid in 22,000 mL of purified water, and stir evenly to obtain an aqueous solution of glucose and oxalic acid;

[0050] (3) 7500 grams of Li 2 CO 3 Add to the above aqueous solution, stir evenly to obtain mixture B;

[0051] (4) Mix the mixtures A and B, and stir evenly to obtain a paste precursor;

[0052] (5) Put the paste precursor into a kraft paper container, put the kraft paper container into an industrial microwave oven, raise the temperature to 750 °C at a rate of 6 °C per minute, and keep it for 30 minutes to obtain the positive electrode material LiNi 1 / 3 co 1 / 3 mn 1 / 3 o 2 .

[0053] This example can prepare about 19kg LiNi 1 / 3 co 1 / 3 mn 1 / 3 o 2 , th...

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Abstract

The invention relates to a method for preparing ternary anode materials LiNi1/3Co1/3Mn1/3O2 for lithium ion batteries, which belongs to the field of lithium ion battery materials. The method comprises the following steps: respectively metering a lithium-containing compound, a cobalt-containing compound, a nickel-containing compound and a manganese-containing compound according to the molar ratio (Li: Co: Ni: Mn) of 1: (0.3 to 0.33): (0.3 to 0.33): (0.3 to 0.33), then evenly mixing the cobalt-containing compound, the nickel-containing compound and the manganese-containing compound so as to obtain a mixture A; adding water and a water soluble carbon-containing compound into the lithium-containing compound and then evenly mixing so as to obtain a mixture B; mixing and evenly stirring the mixture A and the mixture B so as to obtain a pasty precursor; and putting the pasty precursor into an industrial microwave oven, raising the temperature of the pasty precursor with a speed of 4 to 12 DEG C/min to 750 to 850 DEG C, keeping the temperature for 20 to 55min and then reducing the temperature to room temperature. The method has the advantages of rich source of the raw materials, simple preparation process, easy control, low energy consumption and low cost, and the prepared product is high in purity, stable in quality and good in electrochemical performance and can widely be used in industrial production.

Description

technical field [0001] The invention relates to a method for preparing a positive electrode active material of a lithium ion battery, in particular to a method for preparing a manganese-cobalt-nickel ternary positive electrode material of a lithium ion battery by microwave sintering. Background technique [0002] Due to its high output voltage, high specific energy, long cycle life, small self-discharge, safety, and no memory effect, lithium-ion batteries have become the focus of the development of new energy materials in countries around the world. The positive electrode material is lithium-ion The key to the battery. Cathode material is an important part of lithium-ion batteries, and it is also the most expensive part of lithium-ion batteries. [0003] LiCoO 2 As the current commercial lithium-ion battery cathode material, although its theoretical capacity can be as high as 274mAh / g, the actual capacity is only 130-140mAh / g, and cobalt resources are scarce, expensive, an...

Claims

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Application Information

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IPC IPC(8): C04B35/01C04B35/622
Inventor 刘新保贾晓林李恩惠周永刚吴铁雷
Owner HENAN UNION NEW ENERGY
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