System and method for composite cladding of lithium ion battery positive electrode material with carbon and metal oxides

A positive electrode material and ion battery technology, which is applied in the fields of chemical industry and lithium ion battery materials, can solve the problems of affecting battery performance, the inability to achieve high-efficiency controllable carbon and metal oxide coating continuous production, etc., to achieve stable product quality, overcome fine The powder is difficult to fluidize and the effect of high reaction efficiency

Active Publication Date: 2019-04-16
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The surface coating effect of lithium-ion battery cathode materials directly affects the performance of the battery. Summarizing the existing carbon and metal oxide coating cathode material technologies, none of them can achieve efficient and controllable continuous production of carbon and metal oxide coatings.

Method used

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  • System and method for composite cladding of lithium ion battery positive electrode material with carbon and metal oxides
  • System and method for composite cladding of lithium ion battery positive electrode material with carbon and metal oxides

Examples

Experimental program
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Embodiment 1

[0031] System for composite coating of lithium ion battery cathode material with carbon and metal oxide

[0032] Such as figure 1 As shown, the device system includes a silo 1, a screw feeder 2, a feed valve 3, a fluidized bed reactor 4, a discharge valve 5, a product cooler 6, a product collector 7, and a burner connected in sequence. 8. Reaction carrier gas preheater 9, precursor generator 10, reaction raw material nozzle 11, fluidized carrier gas preheater 12, primary cyclone separator 13, secondary cyclone separator 14, bag filter 15 and Hydrochloric acid tail gas absorber 16;

[0033] The discharge port of the silo 1 is connected with the feed port of the screw feeder 2, and the discharge port of the screw feeder 2 is connected with the feed port of the feed valve 3. The feed valve The discharge port of 3 is connected with the feed port of the fluidized bed reactor 4, and the gas inlet of the fluidized bed reactor 4 is connected with the gas outlet of the fluidized carrier ga...

Embodiment 2

[0035] A method for composite coating of lithium ion battery cathode material with carbon and metal oxide:

[0036] The carbon and metal oxide composite coating modification method includes the following steps: the cathode material powder enters the fluidized bed reactor 4 from the silo 1 through the screw feeder 2 and the feed valve 3 and stays for a certain period of time. The primary cyclone 13, secondary cyclone 14 and bag filter 15 are collected and returned to the fluidized bed reactor 4;

[0037] After the coal gas is heated by the burner 8, the reaction carrier gas preheater 9 and the fluidized carrier gas preheater 12 exchange heat, and the gas is preheated, and the heat exchanged gas is directly discharged as waste gas. The carrier gas and water are sent to the fluidized carrier gas preheater 12 for preheating, and the preheated mixed gas enters the fluidized bed reactor 4 to maintain the positive electrode material powder in a fluidized state; another carrier gas passes ...

Embodiment 3

[0039] Using the coating process described in Example 2, the ternary nickel cobalt lithium manganate material enters the fluidized bed reactor 4 from the silo 1 through the screw feeder 2 and the feed valve 3, and is preheated by the reaction carrier gas The nitrogen temperature after the reactor 9 is 40℃, and it enters the precursor generator 10. The precursor generator 10 is a benzene solution of trimethylaluminum with a concentration of 6%. The carrier gas loaded with precursor vapor enters through the reaction raw material nozzle 11. In the fluidized bed reactor 4, at the same time, another channel of nitrogen is preheated by the fluidized carrier gas preheater 12, and then forms a mixed gas with water vapor to enter the fluidized bed reactor 4. The mass ratio of water vapor to trimethylaluminum The ratio is 1:2, the two gases are mixed in the fluidized bed reactor 4, and pyrolysis reaction and gas phase hydrolysis reaction occur at the same time, and carbon and metal oxides...

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Abstract

The invention relates to a system and method for the composite cladding of a lithium ion battery positive electrode material with carbon and metal oxides. The system is mainly composed of a material chamber, a spiral feeding device, a feeding valve, a fluid-bed reactor, a discharging valve, a product cooling device, a product collecting device, a combustion device, a reactor gas carrying preheating device, a precursor generator, a reactor raw material nozzle, a fluidifying gas carrying preheating device, a first-stage cyclone separator, a second-stage cyclone separator, a cloth bag dust collecting device and a hydrochloric tail gas device according to a set combination. The method is characterized in that a positive electrode composite powder body cladded by the carbon and the metal oxidesis obtained through fluidized chemical vapor deposition based on a carbon and metal oxide composite cladding modified method of the system. The system and the method have the advantages that the cladding efficiency is high, the technology is simple and controllable, the cost is low, the system and the method are suitable for the scaled industrial production of the carbon and metal oxide compositecladding modified positive electrode material of a lithium ion battery, and better economic benefits and social benefits are achieved.

Description

Technical field [0001] The invention belongs to the field of lithium ion battery materials and chemical industry, and specifically relates to a system and method for composite coating of lithium ion battery cathode materials with carbon and metal oxide. Background technique [0002] In recent years, with the rapid development of new energy vehicles, people have put forward higher requirements for the performance of lithium-ion power batteries. As the core component of lithium-ion batteries, electrode materials determine the performance of lithium-ion batteries. Relative to the mature and stable commercial graphite anode, the research and development of cathode materials with high capacity, long life, low cost and safety and environmental protection is particularly urgent. The current commercial cathode materials for lithium ion batteries mainly include layered lithium cobalt oxide, ternary materials, spinel structure lithium manganese oxide, and olivine structure lithium iron ph...

Claims

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Application Information

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IPC IPC(8): B01J8/24B01D50/00H01M4/36H01M4/505H01M4/525H01M4/62H01M10/0525
CPCB01J8/1818B01J8/1836B01J8/1872B01J8/24H01M4/366H01M4/505H01M4/525H01M4/624H01M4/625H01M4/628H01M10/0525B01D50/20Y02E60/10
Inventor 吕鹏鹏朱庆山李欣鑫史和邦
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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