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Method for preparing spherical positive pole active material for lithium ion position

A technology for positive active materials and lithium-ion batteries, applied in battery electrodes, electrode heat treatment, active material electrodes, etc., can solve the problems of uneconomical, high energy consumption of pyrolysis, etc., and achieve the effects of reduced energy consumption, high density, and large capacity

Inactive Publication Date: 2003-01-22
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the particle size obtained by this method is at the nanometer level, and the solution is directly pyrolyzed at high temperature, which consumes a lot of energy and is uneconomical.

Method used

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  • Method for preparing spherical positive pole active material for lithium ion position
  • Method for preparing spherical positive pole active material for lithium ion position
  • Method for preparing spherical positive pole active material for lithium ion position

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] First, make a solution of cobalt acetate and lithium acetate, so that Co 2+ with Li + The molar ratio of the solution is 1:1; the solution is spray-dried at an inlet temperature of 300°C and an outlet temperature of 200°C to obtain a precursor powder;

[0025] Then the precursor powder is thermally decomposed in a thermal decomposition furnace, the temperature is controlled at 850°C±5°C, and the powder is collected by cyclone separation;

[0026] Finally, the powder was calcined at 800°C for 10 hours under disturbance to obtain the spherical lithium-ion battery cathode active material LiCoO 2 . Its X-ray diffraction spectrum is shown in the attached figure 1 , the scanning electron microscope spectrum is shown in the appendix figure 2 .

Embodiment 2

[0028] First, make a solution of cobalt acetate and lithium acetate, so that Co 2+ with Li + The molar ratio of the solution is 1:1; the solution is spray-dried at an inlet temperature of 430°C and an outlet temperature of 200°C to obtain a precursor powder;

[0029] Then the precursor powder is thermally decomposed in a thermal decomposition furnace, the temperature is controlled at 900°C±5°C, and the powder is collected by cyclone separation;

[0030] Finally, the powder was calcined at 800°C for 8 hours under disturbance to obtain the spherical lithium-ion battery cathode active material LiCoO 2 .

Embodiment 3

[0032] First, make a solution of cobalt nitrate and lithium nitrate to make Co 2+ with Li + The molar ratio of the solution is 1:1; the solution is spray-dried at an inlet temperature of 350°C and an outlet temperature of 200°C to obtain a precursor powder;

[0033] Then the precursor powder is thermally decomposed in a thermal decomposition furnace, the temperature is controlled at 950°C±5°C, and the powder is collected by cyclone separation;

[0034] Finally, the powder was calcined at 800°C for 5 hours under disturbance to obtain the spherical lithium-ion battery cathode active material LiCoO 2 .

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Abstract

This invention provides a method for preparing anode active material of spherical micron order powder for Li-ion battery including the following steps: firstly compounding soluble Co, Mn or Ni salts with LI salt in to a solution to be sprayed with inlet temperature at 300-450 deg.C, and outlet temperature at 200-305 deg.C and dried to form precursor powder, then decomposing in a thermo decomposition furnace at a controlled temperature of 850-1000 deg.c to be gathered by cyclone separation. The powder is calcinated again for 5-25 hours at 750-8000 deg.C under perturbation, and finally the spherical Li-ion battery anode active material is obtained.

Description

technical field [0001] The invention relates to a preparation method of a positive electrode active material of a lithium ion battery, in particular to a preparation method of a positive electrode active material of a spherical lithium ion battery. Background technique [0002] The development level of chemical power sources has become a symbol of scientific and technological progress and modern needs. The current self-development of chemical power has surpassed any period in history. Small size, light weight, large capacity, high power, no pollution, and long life have become ideal requirements for chemical batteries. Due to the advantages of high output voltage, large specific energy, long cycle life, good safety performance, no pollution, and no memory effect, lithium-ion batteries have become a hot spot in the field of materials for the design, research and development of new lithium-ion battery electrode materials. [0003] At present, lithium cobalt oxide is the most...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01D15/00C01D15/02H01M4/36
CPCH01M4/1391C01G53/42C01G45/1242H01M4/02C01G53/44C01P2006/40H01M4/0471C01P2004/03C01G51/44C01G53/00C01P2004/61Y02E60/122C01P2002/72C01P2004/32C01G51/42H01M2004/021Y02E60/10
Inventor 杨岩峰林志明宋广智
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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