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Preparation method for lithium-nickel-cobalt-manganese-vanadium oxygen electrode material

A lithium-nickel-cobalt-manganese-vanadium-oxygen and electrode material technology is applied in the field of preparation of lithium-ion battery materials, which can solve the problems of long calcination time at high temperature, many influencing parameters, and many synthesis steps, etc., and achieves reduced preparation costs, simple separation and treatment, The effect of improving the diffusion rate

Active Publication Date: 2012-07-25
TIANNENG SAFT ENERGY JOINT CO +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The method for preparing lithium nickel cobalt manganese oxide in the prior art has problems such as many synthesis steps, many influencing parameters, long calcination time at high temperature, and high preparation cost.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Lithium, nickel, manganese and cobalt are weighed in a ratio of 3.3:1:1:1 to lithium chloride, nickel chloride, manganese chloride and cobalt chloride with the total amount of four elements being 6.3mol, and a 3.15mol / L For the metal solution, the solvent is a water-ethanol mixture, and the mass percentage of water is 30wt%. Prepare 4mol / L ammonium carbonate solution simultaneously, add ammonia gas and high-purity hydrogen peroxide, make their concentration be 1mol / L and 0.4mol / L respectively, add polyethylene glycol, polyethylene glycol accounts for 3wt% of the total mass of mixed lye .

[0025] Spray the above-mentioned metal solution and mixed lye into the reactor through a metering pump, and stir with a stirrer. Control the ratio of the pumped amount of the metal solution to the pumped amount of the mixed lye to 0.5-1, adjust the pH of the mixed solution to 9-11; control the reaction temperature of the mixed solution to 40-80°C. The mixed liquid overflows naturall...

Embodiment 2

[0028]Lithium, nickel, manganese, cobalt and vanadium are weighed in a ratio of 3.3:1:1:1:0.03 to take lithium chloride, nickel chloride, manganese chloride, vanadium chloride and chlorine with the total amount of five elements being 6.33mol Cobalt, prepare 3.165mol / L metal solution, the solvent is water-ethanol mixture, the mass percent of water is 40wt%. Prepare 4.2mol / L ammonium carbonate solution simultaneously, add ammonia gas and high-purity hydrogen peroxide, make their concentration be 1.2mol / L and 0.6mol / L respectively, add polyethylene glycol, polyethylene glycol accounts for 6wt of mixed lye quality %.

[0029] Spray the above-mentioned metal solution and mixed lye into the reactor through a metering pump, and stir with a stirrer. Control the ratio of the pumped amount of the metal solution to the pumped amount of the mixed lye to 0.5-1, adjust the pH of the mixed solution to 9-11; control the reaction temperature of the mixed solution to 40-80°C. The mixed liquid...

Embodiment 3

[0032] Lithium, nickel, manganese, cobalt and vanadium are weighed in the ratio of 3.3:1:1:1:0.09 to take lithium nitrate, nickel nitrate, manganese nitrate, vanadium nitrate and cobalt nitrate with the total amount of five elements being 6.39mol, and prepare 3.195 mol / L metal solution, the solvent is a water-acetone mixture, and the mass percentage of water is 25wt%. Prepare 5.2mol / L ammonium carbonate solution simultaneously, add ammonia gas and high-purity hydrogen peroxide, make their concentration be 1.6mol / L and 0.8mol / L respectively. Add polyethylene glycol, polyethylene glycol accounts for 5wt% of mixed lye quality.

[0033] Spray the above-mentioned metal solution and mixed lye into the reactor through a metering pump, and stir with a stirrer. Control the ratio of the pumped amount of the metal solution to the pumped amount of the mixed lye to 0.5-1, adjust the pH of the mixed solution to 9-11; control the reaction temperature of the mixed solution to 40-80°C. The m...

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Abstract

The invention provides a preparation method for a lithium-cobalt-nickel-manganese-vanadium oxygen electrode material, which comprises the following steps of: a-, dissolving soluble salts of lithium, nickel, manganese, cobalt and vanadium into metallic solution formed by water and an organic solvent, evenly mixing the metallic solution with mixed alkali liquor prepared from ammonia water, ammonium carbonate, hydrogen peroxide and polyethylene glycol in proportion; and then, atomizing and heating to form lithium-nickel-cobalt-manganese-vanadium oxygen precipitations; b-, baking and briquetting the lithium-nickel-cobalt-manganese-vanadium oxygen precipitations; calcining under an air atmosphere to obtain a sintered product; cooling, grinding and screening the sintered product; and then calcining under an oxygen atmosphere to form the lithium-cobalt-nickel-manganese-vanadium oxygen material. The preparation provided by the invention is simpler n step, is lower in cost and is milder in high-temperature calcining condition.

Description

technical field [0001] The invention relates to a preparation method of a lithium ion battery material, in particular to a preparation method of a lithium nickel cobalt manganese vanadium oxide electrode material. Background technique [0002] Lithium-ion battery is a commercial battery developed in the past 20 years. Because of its high energy density, long cycle life, and environmental friendliness, it has gradually replaced traditional lead-acid batteries and nickel-metal hydride batteries, and is widely used in portable electronic devices. Equipment and electric vehicles and many other fields. The electrochemical performance of lithium-ion batteries mainly depends on the structure and performance of the electrode materials and electrolyte materials used. In particular, the cathode material electrode occupies an important position in the structure of lithium-ion batteries, and its performance directly determines the quality of lithium-ion battery products. performance. ...

Claims

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Application Information

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IPC IPC(8): H01M4/505H01M4/525
CPCY02E60/122Y02E60/10
Inventor 张天任范美强舒康颖刘建波陈达施利勇李福林刘文法郭鑫施寅
Owner TIANNENG SAFT ENERGY JOINT CO
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