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Preparation of electrode-active material by using double-pipe type heat exchanger

An electrode active material and a technology for active materials, which are applied in the field of devices for preparing electrode active materials, can solve the problems of shortening equipment life, pressure rise, and cathode active material pressure increase, so as to suppress clogging and scaling, reduce maintenance costs, increase The effect of crystallinity

Inactive Publication Date: 2013-08-21
HANWHA CHEMICAL CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Moreover, if the fluid does not have suitable turbulence characteristics, due to the difference in density and viscosity between the particles and the fluid, scaling occurs in which ions or particles are deposited on the wall surface, causing solid particles to settle in the device.
[0007] Process shutdown, maintenance and repair are necessary as clogging stresses the cathode active material manufacturing process from continuous operation
However, the frequent start and stop of the process will shorten the life of the equipment, increase maintenance and repair costs, make continuous production difficult, and cause an increase in process operation, raw material and equipment costs, and increase the unit price of product preparation
Also, frequent starts and stops of the process may reduce the crystallinity of the primary particles
Moreover, clogging can cause the pressure in the equipment to rise rapidly and increase the risk of safety incidents

Method used

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  • Preparation of electrode-active material by using double-pipe type heat exchanger
  • Preparation of electrode-active material by using double-pipe type heat exchanger
  • Preparation of electrode-active material by using double-pipe type heat exchanger

Examples

Experimental program
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Effect test

Embodiment 1

[0059] Attached for reference Image 6 to illustrate.

[0060] In the mixer 1, the LiFePO supplied through the path 10 is mixed 4 raw materials with supercritical water, and form LiFePO containing 4 Precursor slurry. The slurry is introduced into reactor 2 in a supercritical environment with a temperature of 386°C and a pressure of 250 bar to synthesize LiFePO 4 , the resulting synthesis product is supplied to the jacketed heat exchanger 3 through the path 30 and cooled.

[0061] As the reactor 2, such a tube was used, and the inner diameter was kept constant at the connecting portion between the reactor 2 and the mixer 1, the outlet of the reactor, the portion connecting the nozzle with the heat exchanger nozzle, and each part of the reactor. The density of the fluid in reactor 2 is 270kg / m 3 , the viscosity is 3.57×10 -5 Pa. s, Reynolds number N Re is 754,000, and the kinetic energy k is 0.032m 2 / s 2 , the turbulent dissipation rate ε is 1.457m 2 / s 3 .

[0062...

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Abstract

The present invention relates to preparation of an electrode-active material, which uses a reactor to produce an electrode-active material by using a supercritical hydrothermal synthesis method, and a double-pipe type heat exchanger which cools the product discharged from the reactor to a subcritical range or below it.

Description

technical field [0001] The present invention relates to a device and a method for preparing electrode active materials by using a supercritical hydrothermal synthesis method and a jacketed heat exchanger. Background technique [0002] Electrode active materials can be prepared by various methods. Methods for preparing electrode active materials for secondary batteries include solid phase method, co-precipitation method, hydrothermal method, supercritical hydrothermal method, sol-gel method and alkoxy compound method. [0003] For the cathode active materials of lithium secondary batteries, if the supercritical hydrothermal synthesis method is used, the crystallinity of the particles will be greatly improved, and it is possible to make the average particle diameter of the primary particles in the range of tens to hundreds of nanometers. advantage. [0004] Regarding the supercritical hydrothermal synthesis method, many studies have been conducted to establish the mixing of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J19/24H01M4/58H01M4/04
CPCH01M4/04B01J19/2405B01J19/2415B01J3/008B01J2219/00029B01J2219/00092B01J2219/00103B01J2219/00247H01M4/5825C01D15/02C01B25/45F28D7/10Y02P20/54Y02E60/10B01J19/24H01M4/58H01M4/0471
Inventor 宋圭镐朴世雄林成在丁基泽韩基道
Owner HANWHA CHEMICAL CORPORATION
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