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Ultrasonic atomization preparation method of porous hollow spherical ternary positive electrode material

A cathode material, ultrasonic atomization technology, applied in electrode manufacturing, electrical components, battery electrodes, etc., to simplify the synthesis process, improve high-current charge-discharge performance and cycle performance, and reduce production costs.

Inactive Publication Date: 2017-09-29
FUJIAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to solve the above-mentioned problems in the process of high-temperature solid-phase synthesis of ternary materials, the present invention provides a method for preparing a porous hollow spherical ternary positive electrode material, which solves the problem of uneven mixing of materials and consistent product particle size in solid-phase synthesis. Due to the disadvantages of poor performance, a nano-scale ternary cathode material with high crystallinity is obtained

Method used

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  • Ultrasonic atomization preparation method of porous hollow spherical ternary positive electrode material
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  • Ultrasonic atomization preparation method of porous hollow spherical ternary positive electrode material

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Embodiment 1

[0035] Hollow spherical porous LiNi 1 / 3 co 1 / 3 mn 1 / 3 o 2

[0036] Take by weighing 2.142 grams of lithium acetate, 1.659 grams of nickel acetate, 1.661 grams of cobalt acetate, and 1.634 grams of manganese acetate and dissolve them in 50 milliliters of deionized water, add 3.0821 grams of citric acid after stirring continuously at room temperature for 30 minutes, drip ammonia water in the stirring state, and adjust The pH value of the solution, the pH value of the solution is controlled at about 6.9, and then continuously stirred in a water bath at 60° C. for 4 hours to obtain a precursor solution for ultrasonic atomization.

[0037] Be that the solution obtained by atomizing the ultrasonic atomization system of 1.7MHz with the oscillation frequency, the atomization amount is 0.2 milliliters per minute, and the atomized droplet that produces is loaded into the tube furnace that temperature is 700 ° C by vacuum pump, The moving speed of the mist in the quartz tube is 2 cm / ...

Embodiment 2

[0043] Spherical Porous LiNi 0.5 co 0.2 mn 0.3 o 2

[0044] Weigh 2.687 grams of lithium sulfate, 2.628 grams of nickel sulfate, 1.124 grams of cobalt sulfate, and 1.014 grams of manganese sulfate and dissolve them in 50 milliliters of deionized water. After stirring continuously at room temperature for 30 minutes, add 3.0821 grams of citric acid, drip ammonia water in the stirring state, and adjust The pH value of the solution, the pH value of the solution is controlled at about 6.8, and then continuously stirred in a water bath at 60° C. for 12 hours to obtain a precursor solution for ultrasonic atomization. Be the solution obtained by atomizing the ultrasonic atomization system of 2.4MHz with the oscillation frequency, the atomization amount is 0.2 milliliters per minute, and the atomized liquid droplet that produces is loaded into the tube furnace that temperature is 750 ° C by vacuum pump, The moving speed of the mist in the quartz tube is 3 cm / s, and the dried precur...

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Abstract

The invention belongs to the technical field of an electrode material of a lithium ion battery, and relates to an ultrasonic atomization preparation method of a porous hollow spherical ternary positive electrode material. The method is as follows: water soluble lithium, nickel, cobalt and manganese sources and a metal chelating agent are dissolved in the molar ratio of 1-1.2: x : y: z into deionized water, and are stirred in a water bath pot to reflux, and after 8 to 20 hours of stirring, a precursor solution for atomization is obtained, then the obtained mixed solution is atomized into droplets by an ultrasonic atomizer, the droplets are loaded into a high temperature furnace with the help of a vacuum pumping system, the droplets become precursor powder, and finally the porous hollow spherical ternary positive electrode material is obtained by calcination in an air or oxygen atmosphere. The method effectively control the chemical composition, phase composition and particle size of the porous hollow spherical ternary positive electrode material, and the prepared porous hollow spherical ternary positive electrode material has high tap density, uniform particle size distribution, and excellent electrochemical performance, and is suitable for industrialized production.

Description

Technical field: [0001] The invention relates to an ultrasonic atomization preparation method of a porous hollow spherical ternary positive electrode material, belonging to the technical field of preparation of lithium ion battery materials. technical background [0002] Lithium-ion battery is a superior battery system, which has the advantages of high working voltage, high energy density, no pollution and good cycle performance. It is widely used in portable digital devices, power tools and armed equipment and other mobile electronic terminal equipment fields. Cars also have broad development prospects, and are considered to be high-tech products that are of great significance to the national economy and people's lives in the 21st century. [0003] Layered ternary material LiNi x co y mn z o 2 ( x + y + z =1) is LiCoO 2 / LiNiO 2 / LiMnO 2 The three-phase solid solution has obvious ternary synergistic effect, has the advantages of high specific capacity, high discha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/04H01M4/505H01M4/525
CPCH01M4/0416H01M4/0471H01M4/505H01M4/525Y02E60/10
Inventor 林应斌陶剑铭林志雅黄志高
Owner FUJIAN NORMAL UNIV
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