Preparation method of manganese Li-NiCoMn ternary material for lithium ion battery

A technology of nickel-cobalt lithium manganese oxide and lithium-ion batteries, which is applied in the field of new energy material preparation, can solve the problems of difficulty in obtaining materials without impurities, reduction of comprehensive electrical properties, difficulty in drying and water removal, etc., and achieve high-temperature cycle performance Bad, improved high temperature performance, excellent basic indicators

Inactive Publication Date: 2013-05-22
DAXIN MANGANESE MINE BRANCH OF CITIC DAMENG MINING IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method will inevitably bring about the inhomogeneity of the material, which makes it difficult to obtain materials without impurity phases after sintering, resulting in rapid capacity decay and lower overall electrical properties.
Another method is the sol-gel method, but it is difficult to dry and remove water in this method, which affects its industrialization

Method used

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  • Preparation method of manganese Li-NiCoMn ternary material for lithium ion battery
  • Preparation method of manganese Li-NiCoMn ternary material for lithium ion battery
  • Preparation method of manganese Li-NiCoMn ternary material for lithium ion battery

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Experimental program
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Effect test

Embodiment 1

[0035]According to the molar ratio Ni:Mn:Co=1:1:1, prepare a mixed aqueous solution of cobalt sulfate, nickel sulfate, and manganese sulfate with a total metal concentration of 1mol / L; place it in a reaction kettle with a draft tube. Prepare a caustic soda solution with a concentration of 10mol / L; prepare NH with a concentration of 10mol / L 4 + solution.

[0036] The above caustic soda solution and NH 4 + The solution is evenly added to the reaction kettle to control the content of NH 4 + The amount of compound added is the molar ratio NH 4 + / (Ni+Mn+Co)=4:1; add caustic soda solution to control the pH value of the reaction to 12.5; the reaction temperature is room temperature (30°C), react for 8 hours and then age for 8 hours, pay attention to the control of the aging process The pH value is consistent with the pH value of the reaction process. Filter, wash, and dry to obtain the nickel-cobalt-manganese ternary precursor. The average particle size of the ternary precur...

Embodiment 2

[0041] According to the molar ratio Ni:Mn:Co=4:4:2, prepare a mixed aqueous solution of cobalt chloride, nickel chloride, and manganese chloride with a total metal concentration of 1mol / L; place it in a reaction kettle with a draft tube. Prepare a caustic soda solution with a concentration of 5mol / L; prepare NH with a concentration of 5mol / L 4 + solution.

[0042] The above caustic soda solution and NH 4 + The solution is evenly added to the reaction kettle to control the content of NH 4 + The amount of compound added is the molar ratio NH 4 + / (Ni+Mn+Co)=2:1; add caustic soda solution to control the pH value of the reaction to 10.0; the reaction temperature is room temperature (25°C), react for 10 hours and then age for 8 hours, pay attention to the control of the aging process The pH value is consistent with the pH value of the reaction process. Filter, wash, and dry to obtain the nickel-cobalt-manganese ternary precursor. The average particle size of the ternary pre...

Embodiment 3

[0047] Prepare a mixed aqueous solution of cobalt nitrate, nickel nitrate and manganese nitrate with a total metal concentration of 1.5 mol / L according to the molar ratio Ni:Mn:Co=5:3:2; place it in a reaction kettle with a draft tube. Prepare a caustic soda solution with a concentration of 8mol / L; prepare NH with a concentration of 5mol / L 4 + solution.

[0048] The above caustic soda solution and NH 4 + The solution is evenly added to the reaction kettle to control the content of NH 4 + The amount of compound added is the molar ratio NH 4 + / (Ni+Mn+Co)=3:1; add caustic soda solution to control the pH value of the reaction to 12.0; the reaction temperature is room temperature (15°C), react for 12 hours and then age for 8 hours, pay attention to the control of the aging process The pH value is consistent with the pH value of the reaction process. Filter, wash, and dry to obtain the nickel-cobalt-manganese ternary precursor. The average particle size of the ternary precu...

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Abstract

The invention relates to a preparation method of a manganese Li-NiCoMn ternary material for a lithium ion battery. The chemical formula of the manganese Li-NiCoMn ternary material is LiNixMnyCo(1-x-y)O2, wherein x is equal to 0.1 to 0.5, y is equal to 0.1 to 0.6, and 1-x-y is more than or equal to 0. According to the manganese Li-NiCoMn ternary material for the lithium ion battery, prepared by the method, the volume ratio capacity of a final product is increased by improving the density of a NiCoMn ternary precursor material, the high-temperature performance of the Li-NiCoMn is improved through composite cladding, and the problems that the Li-NiCoMn is poor in high-temperature cycle performance and poor in storage performance can be solved. Advantages such as high compaction density, large specific volume, good cycle performance, stability in quality, low cost, simplicity in preparation process and easiness for realizing industrialization can be realized.

Description

technical field [0001] The invention belongs to the technical field of preparation of new energy materials, in particular to a method for preparing a manganese-based nickel-cobalt lithium manganate ternary material for lithium-ion batteries, and a method for compound coating nickel-cobalt lithium manganate to improve high-temperature performance . Background technique [0002] In order to gradually solve the three major problems of energy shortage, greenhouse gas and air pollution that restrict the current economic development, lithium-ion batteries, as an energy storage device, have high working voltage, high energy density, long cycle life and low self-discharge rate. , No memory effect, no environmental pollution and other advantages. In the past ten years, it has achieved rapid development in technology, production and market, and has formed a large emerging industry, which has attracted more and more attention from all aspects. [0003] At present, the positive electr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/48
CPCY02E60/12Y02E60/10
Inventor 王春飞李华成李普良李运姣胡明超卢道焕张丽云韦慷
Owner DAXIN MANGANESE MINE BRANCH OF CITIC DAMENG MINING IND
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