A making method of cathode material for lithium ion battery

A technology for lithium ion batteries and cathode materials, which is applied in the field of preparation of cathode materials for lithium ion batteries, can solve the problems that powder particles are difficult to achieve spherical effect, pollute the natural environment, and are difficult to recycle, and achieve convenient doping and simple operation. , the effect of easy control

Active Publication Date: 2009-07-08
GUANGZHOU LIBODE NEW MATERIAL
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Problems solved by technology

There are mainly the following disadvantages in the production of chemical co-precipitation method: 1. The utilization rate of raw materials in conventional co-precipitation method is generally within 95% due to the complexation of complexing agent and the influence of the solubility of precipitated substances, and a large amount of precious metals during production. The form of ions enters the filtrate and is difficult to recycle, which not only increases the cost, but also pollutes the natural environment on which human beings depend.
②Currently, the cathode material preparation process of co-precipitation method, which uses hydroxide or carbonate as precipitant and ammonia water as complexing agent, needs to go through multiple steps such as co-precipitation and aging. The process is complicated and takes 24 hours or more long
③The tap density of the powder material prepared by the co-precipitation method is generally 2.0g / cm 3 Below, and the powder particles are difficult to achieve spherical effect

Method used

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  • A making method of cathode material for lithium ion battery
  • A making method of cathode material for lithium ion battery
  • A making method of cathode material for lithium ion battery

Examples

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Embodiment 1

[0020] Prepare 100 kg of mixed metal according to the mass ratio of Ni, Mn, and Co at 1:1:1, add it to an intermediate frequency furnace and heat it to melt it, and when the temperature reaches 1600-1680°C, inject the molten metal into the atomizing device and start the high-pressure water pump , the water pressure is controlled at 27±1Mpa, and the high-pressure spray acts on the metal liquid flow to prepare Ni with a median particle size D50 of 10.2μm 1 / 3 co 1 / 3 mn 1 / 3 alloy powder, figure 1 SEM photograph of the powder. The powder was calcined in a muffle furnace at 500°C to obtain a composite metal oxide Ni 1 / 3 co 1 / 3 mn 1 / 3 o 2 . Will Li 2 CO 3 with the Ni obtained above 1 / 3 co 1 / 3 mn 1 / 3 o 2 According to the molar ratio Li / NiMnCo=1.03, it is fully mixed and then calcined at 900°C for 20 hours to obtain LiNi, a cathode material for lithium-ion batteries with a high vibration ratio. 1 / 3 co 1 / 3 mn 1 / 3 o 2 , figure 2 It is the SEM photo of the material, and...

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Abstract

The invention discloses a preparing method of cathode material used in lithium battery which possesses high utilization ratio and fast reaction speed and can increase vibro-compressor density, said cathode material is expressed by following structure: LiNi1-x-yCoxMyO2, thereinto M is selected from at least one of metal Mn, Al, Ti, Cu, 0<=x<=0.5, 0<=y<=0.5; The preparing method includes following steps: (1) tantalum contained in said cathode material except Li is matched as content to obtain raw material; (2) at least one of tantalum except Li is used to produce ball metal powder; (3) said metal powder is sintered to obtain oxid Ni1-x-yCoxMyO2; (4) said oxid is mixed into lithium compound and other tantalum in step (2) to be sintered, cathode material used in lithium battery LiNi1-x-yCoxMyO2 can be obtained.

Description

technical field [0001] The invention relates to a preparation method of a cathode material for a lithium ion battery. Background technique [0002] Since the commercialization of lithium-ion batteries in the early 1990s, they have achieved rapid development due to their high energy density and no memory effect. Due to the higher tap density of spherical active materials, lithium-ion batteries made with them have higher energy density and cycle performance, so spheroidization has become the development direction of battery materials. [0003] For example, Wan Chunrong and Jiang Changyin of the Nuclear Research Institute of Tsinghua University have developed spherical lithium cobaltate (Power Technology 28 (9): 5262004) and spherical lithium manganate (Chinese Journal of Nonferrous Metals 2005.9) respectively by co-precipitation method (or controlled crystallization method). : 1390) and spherical lithium iron phosphate (Power Technology 30 (1): 112006). There are mainly the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/04H01M4/58H01M4/48B01J19/00C01D15/00C01G1/02C01G51/00C01G53/00C22C1/00B22F9/00
CPCY02E60/10
Inventor 骆宏钧赵世勇方剑慧
Owner GUANGZHOU LIBODE NEW MATERIAL
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