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Device and method for preparation of lithium nickel manganese cobaltate by hot cyclonic mechanochemical coating process

A technology for preparing nickel manganese cobalt oxide and mechanochemical technology, applied in the field of energy materials, can solve the problems of manufacturing of speed-increasing mechanical transmission parts, difficulty of axial mechanical sealing, small loading of materials, etc., and achieve controllable coating amount. , to avoid safety problems, the effect of high production efficiency

Pending Publication Date: 2018-03-06
北京圣比和科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] At present, related industries use a mechanical fusion machine to coat NMC and other positive electrode active materials, but the production efficiency of this device is low, and the amount of material loaded is small. In order to improve the mechanical energy, the mechanical fusion machine requires a very high speed, usually at 6000rpm Left and right, it brings great difficulty to the manufacture of speed-increasing mechanical transmission parts and axial mechanical seal, and the equipment cost is high

Method used

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  • Device and method for preparation of lithium nickel manganese cobaltate by hot cyclonic mechanochemical coating process
  • Device and method for preparation of lithium nickel manganese cobaltate by hot cyclonic mechanochemical coating process
  • Device and method for preparation of lithium nickel manganese cobaltate by hot cyclonic mechanochemical coating process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] use figure 2 and image 3 The device for preparing lithium nickel manganese cobalt oxide material by hot cyclone mechanochemical coating method is shown. The device includes

[0042] Compressed air heating chamber 1, multi-stage cyclone disk 3, bag dust collection chamber 6, screw conveyor. The output pipeline of the compressed air heating chamber 1 is connected to the multi-stage cyclone disc 3; the top of the multi-stage cyclone disc 3 is connected to the baghouse 6 through the pipeline, and the bottom of the baghouse 6 is connected to the multi-stage cyclone 3 through the screw conveyor The bottom of the bottom forms a material circulation loop; the baghouse 6 is connected to an exhaust fan; the screw conveyor is provided with a material feeding device and a discharge pipe.

[0043] In this embodiment, the compressed air heating chamber 1 adopts a labyrinth resistance heating box with a power of 60kW. 3 / min of high-pressure air is heated to 300-400°C; air press...

Embodiment 2

[0052] Nickel manganese cobalt hydroxide is prepared by co-precipitation method under the protection of inert atmosphere by using nickel manganese cobalt sulfate mixed solution as raw material and sodium hydroxide solution as precipitant, wherein the atomic ratio of Ni:Mn:Co is 1:1 :1. Then roast at 800°C for 2 hours to obtain nickel-manganese-cobalt oxide, then mix it with lithium carbonate or lithium hydroxide in stoichiometric ratio, and roast at 1000°C for 6 hours to obtain lithium nickel-manganese-cobaltate material LiNi 1 / 3 mn 1 / 3 co 1 / 3 o 2 (referred to as NCM111).

[0053] Take 20kg of NMC111 material and highly active nano Al 2 o 3 400g, mixed in a V-type mixer for 2h.

[0054] Adopt the device of embodiment 1, preheat the compressed air to 250~300 ℃, start the air shutoff device 10 after feeding a small amount of compressed air first; open the feeding pipe butterfly valve 4, open the delivery screw 8, mix the NMC111 and Al 2 o 3 The mixture is added through ...

Embodiment 3

[0058] Nickel manganese cobalt hydroxide is prepared by co-precipitation method under the protection of inert atmosphere with nickel manganese cobalt sulfate mixed solution as raw material and sodium hydroxide solution as precipitant, wherein Ni:Mn:Co atomic ratio is 5:3: 2. Calcined at 600°C for 6 hours to obtain nickel-manganese-cobalt oxide, then mixed with stoichiometric lithium carbonate or lithium hydroxide, and calcined at 850°C for 16 hours to obtain lithium nickel-manganese-cobaltate material LiNi 0.5 mn 0.3 co 0.2 o 2 (referred to as NCM532).

[0059] Take 20kg of NMC532 material and highly active nano TiO 2 150g, mixed in a V-type mixer for 2h.

[0060] Use the same equipment as in Example 1 and the method of Example 2 for coating treatment for 4 hours.

[0061] The cyclone-treated material was calcined for 5 hours in an oxidizing atmosphere at a temperature range of 800° C. to obtain a titanium-coated NCM532 positive electrode active material. The tap densi...

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Abstract

The invention puts forward a device for preparation of a lithium nickel manganese cobaltate material by hot cyclonic mechanochemical coating process. The device consists of a compressed air heating chamber, a multi-stage cyclone disc, a bag dust collection chamber, and a spiral conveyor. The output pipeline of the compressed air heating chamber is connected to the multi-stage cyclone disc, the topof the multi-stage cyclone disc is connected to the bag dust collection chamber through a pipeline, the bottom of the bag dust collection chamber is connected to the bottom of the multi-stage cyclonedisc through the spiral conveyor to form a material circulation loop. The bag dust collection chamber is connected to an exhaust fan. The spiral conveyor is equipped with a feeding apparatus and a discharge pipe. The invention also puts forward a method for preparation of a cathode material with the device. The hot cyclonic mechanochemical coating process provided by the invention is suitable forcoating of various powder materials, overcomes the side effects of an aqueous solution system coating method on materials, and also avoids the safety problem in organic solvent system production. Thecyclone disc series can be simply increased, the coating amount is controllable and the coating is uniform.

Description

technical field [0001] The invention belongs to the field of energy materials, in particular to a device and method for preparing lithium-ion battery electrode materials. Background technique [0002] Lithium-ion battery lithium nickel manganese cobalt oxide cathode material can use the molecular formula LiNi x mn y co 1-x-y o 4 Representation, referred to as NMC. Due to the excellent comprehensive performance of NMC, it has been widely used in energy storage batteries and power batteries. [0003] The surface coating modification method of powder materials is to introduce a coating layer on the surface of the material according to the structural and functional design requirements, and to coat one or more coating layers with different chemical compositions on the surface of the particle body to adapt to different materials. technical needs. Studies have shown that surface coating modification is an effective way to improve the electrochemical performance of NMC materia...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/525H01M4/505C01G51/00
CPCH01M4/505H01M4/525C01G51/44C01P2004/80C01P2006/11C01P2006/12C01P2006/40C01P2004/03Y02E60/10
Inventor 叶尚云张平伟李锡力
Owner 北京圣比和科技有限公司
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