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High tap density metal oxide, preparation method and lithium ion battery

A lithium-ion battery, tap density technology, applied to battery electrodes, circuits, electrical components, etc., can solve problems such as unproposed solutions, achieve uniform composition, increase tap density, and prolong the effect of evaporation and concentration process

Active Publication Date: 2020-12-08
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] For the technical problems existing in the above prior art description, no effective solution has been proposed yet

Method used

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  • High tap density metal oxide, preparation method and lithium ion battery
  • High tap density metal oxide, preparation method and lithium ion battery
  • High tap density metal oxide, preparation method and lithium ion battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] (1) Preparation of spray precursor solution

[0041] Dissolve nickel nitrate salt with deionized water to prepare a nickel nitrate solution with a metal ion concentration of 0.5mol / L, and then add an organic additive tartaric acid, wherein the tartaric acid concentrations are 0, 0.25mol / L, 0.5mol / L, and 1.0mol / L, and mixed uniformly to obtain spray precursor solutions with different additive concentrations.

[0042] (2) Preparation of high tap density metal oxides by spray pyrolysis

[0043] The different nickel nitrate spray precursor solutions described in (1) are atomized by an ultrasonic atomizer respectively, and the carrier gas (O2) with a flow rate of 5L / min is used to send the atomized spray precursor solution into the vertical The spray pyrolysis furnace is used for pyrolysis respectively. The spray pyrolysis temperature is 800°C. The pyrolysis products are collected by a powder collector to obtain solid and dense oxide powder.

[0044] (3) Test analysis

...

Embodiment 2

[0050] (1) Preparation of spray precursor solution

[0051] Dissolve the cobalt acetate salt with deionized water to prepare a cobalt acetate solution with a cobalt ion concentration of 2mol / L, then add the organic additive dimethyl sulfoxide (DMSO), wherein the dimethyl sulfoxide concentration is 1mol / L, mix After being uniform, a spray precursor solution is obtained.

[0052] (2) Preparation of high tap density metal oxides by spray pyrolysis

[0053] The nickel nitrate spray precursor solution described in (1) is utilized ultrasonic nebulizer atomization, utilizes the carrier gas (O 2 ) Send the atomized spray precursor solution into a vertical spray pyrolysis furnace for pyrolysis respectively. The pyrolysis product can obtain solid and dense oxide powder.

[0054] (3) Test analysis

[0055] The materials collected in (2) were analyzed by X-ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microscope (TEM), and tap density (TD), and the m...

Embodiment 3

[0060] (1) Preparation of spray precursor solution

[0061] Dissolve the mixed salts of nickel chloride, cobalt chloride and aluminum chloride with de-distilled water to prepare a mixed nickel chloride, cobalt chloride and aluminum chloride with a total metal ion concentration of 0.5mol / L of nickel ions, cobalt ions and aluminum ions solution, wherein the ratio of the amount of each metal element is Ni:Co:Al=80:15:5, and then add the organic additive N,N-dimethylformamide (DMF), wherein N,N-dimethylformamide The amide concentration is 0.75mol / L, and after mixing evenly, a spray precursor solution is obtained.

[0062] (2) Preparation of high tap density metal oxides by spray pyrolysis

[0063] The spray precursor mixed solution described in (1) is atomized by an ultrasonic atomizer, and the carrier gas (O 2 ) Send the atomized spray precursor solution into a vertical spray pyrolysis furnace for pyrolysis respectively, the spray pyrolysis temperature is 800°C, and the pyrolys...

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Abstract

The invention provides a preparation method of high-tap-density metal oxide. The preparation method comprises the following steps: S1, dissolving metal salt with a solvent; adding an organic additive and uniformly mixing to prepare a precursor solution, wherein the solvent is one or two of de-ionized water and distilled water, and the organic additive is one or more of N,N-dimethylformamide, tartaric acid, acetic acid and dimethyl sulfoxide; S2, atomizing the spraying precursor solution in step S1 by utilizing an atomizer; conveying the precursor solution into a spraying pyrolyzing furnace by utilizing carrying gas, and carrying out pyrolysis; collecting a pyrolysis product by utilizing a powder collector, so as to obtain the high-tap-density metal oxide. The invention further provides the high-tap-density metal oxide prepared by the method and a high-energy-density lithium-ion battery. According to the preparation method provided by the invention, any auxiliary facility does not need to be added, and technology steps do not need to be added; prepared powder grains have good sphericility degree, are dense and compact and have high tap density; the preparation method has the advantages of simple operation, high efficiency, short flow and high practicability.

Description

technical field [0001] The invention relates to the field of powder materials prepared by a spray pyrolysis method, in particular to a high tap density metal oxide, a preparation method and a high energy density lithium ion battery. Background technique [0002] As an important chemical power source, lithium-ion secondary batteries have been widely used in many fields such as mobile electronic equipment, electric tools, and vehicles. Compared with other power sources, it has many advantages such as high energy density, long cycle life, and environmental friendliness. At present, coprecipitation method, hydrothermal method, etc. are widely used in the synthesis and preparation of lithium-ion battery electrode materials. The material particles synthesized by these methods have the characteristics of high tap density, controllable shape, good mechanical properties, and good dispersion. These methods are accompanied by disadvantages such as harsh synthesis conditions, long proc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/04H01M4/485H01M4/505H01M4/525
CPCH01M4/04H01M4/0471H01M4/485H01M4/505H01M4/525Y02E60/10
Inventor 王接喜冷进王志兴李新海郭华军胡启阳彭文杰梁红梅
Owner CENT SOUTH UNIV
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