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Method for preparation of high-density lithium ion battery anode material nickel cobalt manganic acid lithium

A technology for nickel-cobalt lithium manganate and lithium-ion batteries is applied in the field of preparation of high-density lithium-ion battery positive electrode material nickel-cobalt lithium manganate, which can solve the problems of high consumption, long production cycle, unfavorable battery use, etc., and achieve high tap density. and mass specific capacity, the effect of short production cycle

Inactive Publication Date: 2008-07-23
黄成钢
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The nickel cobalt lithium manganese oxide synthesized by this chemical precipitation method has a long production period, and consumes a large amount of water in the production process, and produces a large amount of waste water containing nickel ions, cobalt ions, manganese ions and ammonium ions, which will inevitably affect The environment is polluted, and the tap density of nickel cobalt lithium manganese oxide synthesized by this method is low, at 2.0-2.2g / cm 3 between, which is detrimental to its use in battery

Method used

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  • Method for preparation of high-density lithium ion battery anode material nickel cobalt manganic acid lithium

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Mix nickel oxide, cobalt carbonate, and manganese carbonate uniformly at a molar ratio of Ni:Co:Mn=1:1:1, heat and sinter at a heating rate of 3-5°C / min to 600°C, and hold at 600°C at a constant temperature of 6 hour, after cooling, ball milling and sieving (Ni 1 / 3 co 1 / 3 mn 1 / 3 ) 3 o 4 oxide.

[0021] Will (Ni 1 / 3 co 1 / 3 mn 1 / 3 ) 3 o 4 Oxide and lithium carbonate are mixed uniformly at a molar ratio of Li: (Ni+Co+Mn) at a ratio of 1:1.1, then heated and sintered at a heating rate of 3 to 5°C / min to 900°C, and then kept at 900°C After 16 hours, after cooling, ball milling and sieving, Li was obtained 1.1 Ni 1 / 3 co 1 / 3 mn 1 / 3 o 2 Cathode material. Then conduct the first charge and discharge test.

Embodiment 2

[0023] Mix nickel oxide, cobalt carbonate, and manganese carbonate uniformly at a molar ratio of Ni:Co:Mn=1:1:1, heat and sinter at a heating rate of 3-5°C / min to 500°C, and keep the temperature at 500°C for 12 hour, after cooling, ball milling and sieving (Ni 1 / 3 co 1 / 3 mn 1 / 3 ) 3 o 4 oxide.

[0024] Will (Ni 1 / 3 co 1 / 3 mn 1 / 3 ) 3 o 4 Oxide and lithium hydroxide are mixed uniformly at a molar ratio Li: (Ni+Co+Mn) of 1:1.1, then heated and sintered to 1100°C at a heating rate of 3-5°C / min, and then reheated at 1100°C. Constant temperature for 4 hours, after cooling, ball milling and sieving, Li 1.1 Ni 1 / 3 co 1 / 3 mn 1 / 3 o 2 Cathode material. Then conduct the first charge and discharge test.

Embodiment 3

[0026] Mix nickel hydroxide, cobalt carbonate, and manganese carbonate uniformly at a molar ratio of Ni:Co:Mn=1:1:1, heat and sinter at a heating rate of 3-5°C / min to 800°C, and hold at a constant temperature of 800°C After 10 hours, after cooling, ball milling and sieving, (Ni 1 / 3 co 1 / 3 mn 1 / 3 ) 3 o 4 oxide.

[0027] Will (Ni 1 / 3 co 1 / 3 mn 1 / 3 ) 3 o 4 Oxide and lithium carbonate are mixed evenly at a molar ratio of Li: (Ni+Co+Mn) at a ratio of 1:1.1, then heated and sintered at a heating rate of 3 to 5°C / min to 800°C, and then kept at 800°C After 30 hours, after cooling, ball milling and sieving, Li 1.1 Ni 1 / 3 co 1 / 3 mn 1 / 3 o 2 Cathode material. Then conduct the first charge and discharge test.

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Abstract

The invention discloses a method for preparing cathode material nickel cobalt manganese acid lithium of a high density lithium ion battery, which is characterized in that nickel compounds, cobalt compounds and manganic compounds are mixed and granulated in a heating rate of 3-10DEG C / m, a first sintering is done in a certain temperature and a certain time to obtain an oxide of an intermediate which is nickel, cobalt and manganese, the oxide is (Ni1 / 3Co1 / 3Mn1 / 3)3O4, then the oxide of the nickel, cobalt and manganese is evenly mixed with lithium compounds according to a certain radio in the hate rate of 3-10 DEG C / min, a second sintering is done in high temperature and a certain time, then sintering products are crashed and are graded in particle size, and thereby obtaining high density nickel cobalt manganese acid lithium. The invention has short production period, a large amount of water is not consumed during a production process, a large amount of waste water is not produced, and a synthetic product has the characteristics of high tap density and specific discharge capacity.

Description

technical field [0001] The invention relates to a preparation method of nickel-cobalt lithium manganese oxide, a positive electrode material of a high-density lithium ion battery. Background technique [0002] Lithium-ion batteries are widely used in mobile phones, digital cameras, notebook computers, and military industries due to their high energy, high voltage, good cycle performance, and environmental friendliness. [0003] Among the current commercial lithium-ion battery cathode materials, lithium cobalt oxide occupies the main market, but lithium cobalt oxide has seriously affected and inhibited the application fields and development of lithium-ion batteries and their cathode materials due to high cost and poor safety. [0004] Recently, a new type of lithium-ion battery cathode material, nickel-cobalt-lithium manganese oxide, has attracted increasing attention due to its low cost, good safety, and high mass-specific capacity. At present, the synthesis method of nicke...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/58H01M4/48H01M4/04C01G1/02C01G53/00C01D15/00
CPCY02E60/10
Inventor 韩学武
Owner 黄成钢
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