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A system and method for fast ion conductor coating lithium-ion battery cathode material

A technology of positive electrode materials and ion conductors, which is applied in the fields of chemical industry and lithium ion battery materials, can solve the problems affecting the electrochemical performance of positive electrode materials, and cannot realize the continuous production of high-efficiency, controllable and fast ion conductor coating, and achieve good economic and social benefits , low production energy consumption and operating costs, and stable product quality

Active Publication Date: 2022-03-08
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 effect of fast ion conductor coating directly affects the electrochemical performance of positive electrode materials. Summarizing the existing fast ion conductor coating technology for positive electrode materials, the process of liquid phase mixing combined with sintering cannot achieve efficient and controllable continuous production of fast ion conductor coating

Method used

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  • A system and method for fast ion conductor coating lithium-ion battery cathode material

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Experimental program
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Effect test

Embodiment 1

[0030] A system of fast ion conductors coating cathode materials of lithium-ion batteries

[0031] Such as figure 1 As shown, the system includes silo 1, screw feeder 2, feed valve 3, fluidized bed reactor 4, discharge valve 5, product cooler 6, product collector 7, burner 8, No. 1 Reaction carrier gas preheater 9, metal reaction raw material generator 10, reaction raw material nozzle 11, No. 2 reaction carrier gas preheater 12, lithium reaction raw material generator 13, fluidized carrier gas preheater 14, primary cyclone separation Device 15, secondary cyclone separator 16, bag filter 17 and hydrochloric acid tail gas absorber 18;

[0032] 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, and the feed valve The discharge port of 3 is connected with the feed port of fluidized bed reactor 4, and the gas inlet of described fluidized bed react...

Embodiment 2

[0034] A method for fast ion conductor coating lithium ion battery cathode material:

[0035] The method for coating and modifying the fast ion conductor includes the following steps: the positive electrode material powder enters the fluidized bed reactor 4 from the silo 1 through the screw feeder 2 and the feed valve 3 to stay for a certain period of time, and passes through the primary cyclone Separator 15, secondary cyclone separator 16 and bag filter 17 collect and return to fluidized bed reactor 4;

[0036] After the coal gas is heated by the burner 8, heat is exchanged through the No. 1 reaction carrier gas preheater 9, the No. 2 reaction carrier gas preheater 12 and the fluidized carrier gas preheater 14. The gas is preheated, and the gas discharged from the heat exchange is directly Emitted as exhaust gas. The carrier gas and water are sent together into the fluidized carrier gas preheater 14 for preheating, and the preheated mixed gas enters the fluidized bed reactor...

Embodiment 3

[0038] Using the coating process described in Example 2, the ternary nickel cobalt lithium manganese oxide material enters the fluidized bed reactor 4 from the silo 1 through the screw feeder 2 and the feed valve 3, and passes through the No. 1 reaction carrier gas The nitrogen temperature after the preheater 9 is 155°C, and enters the metal reaction raw material generator 10 to heat the reaction raw material tantalum ethoxide, and the nitrogen temperature after passing through the No. 2 reaction carrier gas preheater 12 is 40°C, and enters the lithium reaction raw material generator 13 Heating lithium tert-butoxide, the mixed gas enters the fluidized bed reactor 4 through the reaction raw material nozzle 11, wherein the mass ratio of tantalum ethoxide to lithium tert-butoxide is 1:5, and at the same time, another path of nitrogen passes through the fluidized carrier gas to preheat After the heater 14 is preheated, it forms a mixed gas with water vapor and enters the fluidized ...

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Abstract

The invention relates to a system and a method for coating a positive electrode material of a lithium-ion battery with a fast ion conductor. The system mainly includes a feed bin, a screw feeder, a feed valve, a fluidized bed reactor, a discharge valve, and a product cooler , product collector, burner, No. 1 reaction carrier gas preheater, metal reaction raw material generator, reaction raw material nozzle, No. 2 reaction carrier gas preheater, lithium reaction raw material generator, fluidized carrier gas preheater, The first-stage cyclone separator, the second-stage cyclone separator, the bag filter and the hydrochloric acid tail gas absorber are formed according to a predetermined combination; the method is based on the fast ion conductor coating modification method of the system. The fast ion conductor-coated cathode composite powder was obtained by deposition. The invention has the advantages of high coating efficiency, simple and controllable process, low cost, etc., is suitable for large-scale industrial production of lithium-ion battery fast ion conductor coated modified cathode materials, and has good economic and social benefits.

Description

technical field [0001] The invention belongs to the fields of lithium ion battery materials and chemical industry, and in particular relates to a system and method for coating a lithium ion battery cathode material with a fast ion conductor. 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. Compared with the mature and stable commercial graphite anode, it is particularly urgent to develop cathode materials with high capacity, long life, low cost, safety and environmental protection. The current commercial lithium-ion battery cathode materials mainly include layered lithium cobaltate, ternary materials, spinel-structured lithium manganate and olivine-structured lithium iron phosphate. Among them, ternary materials ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/36H01M4/485H01M4/505H01M4/525
CPCH01M4/366H01M4/485H01M4/505H01M4/525Y02E60/10
Inventor 吕鹏鹏朱庆山史和邦李欣鑫
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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