Multi-element cathode material for lithium ion battery and preparation method for multi-element cathode material

A technology for lithium-ion batteries and positive electrode materials, applied in battery electrodes, electrical components, circuits, etc., can solve the problems of low volume energy density of materials, small material tap density, and large environmental pollution, so as to improve cycle performance and vibration The effect of high density and short production cycle

Inactive Publication Date: 2012-10-03
广州鸿森材料有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although the co-precipitation method improves the uniform distribution of ions to a certain extent, there are also some defects: the co-precipitation preparation method is costly, the process is complicated, the process control is difficult, and a large amount of waste water and waste gas are generated during the production process, which is very polluting to the environment. The tap density of the prepared material is relatively small, resulting in a relatively low volumetric energy density of the material

Method used

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  • Multi-element cathode material for lithium ion battery and preparation method for multi-element cathode material

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Embodiment 1

[0027] A ternary cathode material for a lithium ion battery, which has a layered structure of α-NaFeO2, and its chemical composition is: Li1.1Ni0.92Co0.05M0.03O2.

[0028] Preparation method: nickel hydroxide with a D50 of 9-12 microns and cobalt hydroxide with a D50 of 3-5 microns , Magnesium hydroxide (Ni:Co:Mg=0.92:0.05:0.03) with D50 of 1-5 microns and lithium hydroxide (content 56.5%) 2000g ((Ni+Co+Mg): Li=1:1.1) and The zirconium balls with a ball-to-material ratio of 1:2 are put into the ball mill together, milled at a speed of 30r / min for 3 hours, taken out and put into a corundum crucible, placed in an atmosphere furnace, under the condition of an oxygen atmosphere (oxygen concentration greater than 50%) , heat up to 800°C at a speed of 3°C / min, keep it warm for 16 hours, then cool down to room temperature at a speed of 3°C / min, pulverize, pass through a 150-mesh sieve, and control the particle size D50 to be about 11 microns. Add deionized water to the pulverized...

Embodiment 2

[0031] A kind of ternary cathode material of lithium ion battery, it has α-NaFeO2 layered structure, and its chemical composition is: Li 1.15 Ni 0.92 co 0.05 m 0.03 o 2 .

[0032] Preparation:

[0033]Mix nickel hydroxide with a D50 of 9-12 microns, cobalt hydroxide with a D50 of 3-5 microns, magnesium hydroxide with a D50 of 1-5 microns (Ni: Co: Mg=0.92:0.05:0.03) and lithium hydroxide (Content 56.5%) 2000g ((Ni+Co+Mn): Li=1:1.15) and zirconium balls with a ball-to-material ratio of 1:3 are added to the ball mill, and the ball is milled at a speed of 30r / min for 3 hours. After taking it out, put it into the corundum Place in a crucible in an atmosphere furnace, under the condition of oxygen atmosphere (oxygen concentration greater than 50%), heat up to 850°C at a rate of 3°C / min, keep it warm for 12 hours, and then cool down to room temperature at a rate of 3°C / min , crushed and passed through a 150-mesh sieve, and the particle size D50 is controlled to be about 11 micr...

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Abstract

The invention discloses a multi-element cathode material for a lithium ion battery and a preparation method for the multi-element cathode material. The multi-element cathode material for the lithium ion battery has an alpha-NaFeO2 layered structure, and comprises the chemical components of Li1+zNixCoyM1-x-yO2, wherein z is more than or equal to 0, and is less than or equal to 0.2; x is more than or equal to 0.85, and is less than or equal to 0.98; y is more than or equal to 0.04, and is less than or equal to 0.1; and M comprises but not limited to Al, Mg and Zn. The multi-element cathode material for the lithium ion battery has the advantages of ultra-high specific capacity, high cycle performance, high thermal stability, high safety and the like.

Description

technical field [0001] The invention relates to the field of new energy materials, in particular to a lithium-ion battery multi-element cathode material and a preparation method thereof. Background technique [0002] Lithium Ion Battery (LIB for short) is the third generation of small batteries after nickel-cadmium batteries and nickel-metal hydride batteries. As a new type of chemical power source, it has the outstanding advantages of high working voltage, large specific energy, stable discharge potential curve, small self-discharge, long cycle life, good low temperature performance, no memory, no pollution, etc. The batteries required by electrical appliances meet the dual requirements of small size, light weight and environmental protection. They are widely used in small electronic devices such as mobile communications, notebook computers, and video cameras. They are also ideal power sources for future electric vehicles. [0003] At present, as one of the important compo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/525H01M4/505H01M4/131H01M4/1391
CPCY02E60/122Y02E60/10
Inventor 刘振添刘和国潘瑞丽
Owner 广州鸿森材料有限公司
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