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Preparation method of hollow bowl-shaped carbon-based metal oxide composite material

A technology of composite materials and hollow bowls, which is applied in the field of preparation of energy storage materials, can solve the problems of no contribution to the electrochemical performance of materials and reduce the volumetric energy density of batteries, and achieve increased volumetric energy density, increased packing density, and high volume The effect of energy density

Active Publication Date: 2014-12-24
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, currently prepared hollow structures (hollow spheres, hollow cubes, hollow tubes, etc.) all have relatively large cavities. Except for buffering the volume change caused by cyclic stress, a large part of the space is idle. The space does not contribute to the electrochemical performance of the material, thus reducing the volumetric energy density of the battery

Method used

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  • Preparation method of hollow bowl-shaped carbon-based metal oxide composite material
  • Preparation method of hollow bowl-shaped carbon-based metal oxide composite material
  • Preparation method of hollow bowl-shaped carbon-based metal oxide composite material

Examples

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Effect test

Embodiment 1

[0016] This embodiment includes the following steps:

[0017] The first step: Weigh 0.1g of hollow bowl-shaped polystyrene microspheres into a flask, add 40mL of concentrated sulfuric acid with a mass concentration of 98%, ultrasonically disperse for 15 minutes, and then stir and react at 40°C for 4 hours to obtain the sulfuric acid The polystyrene microspheres were washed with ethanol until neutral, and dried for later use; the ultrasonic power was 250W; the stirring speed was 400r / m.

[0018] Step 2: Take 10 mg of hollow bowl-shaped sulfonated polystyrene microspheres, add them to 30 mL of 35 mM thioglycolic acid solution, and ultrasonically disperse for 10 minutes. The ultrasonic power is 250 W; then add 30 mg of SnCl in sequence 2 , 30mg of urea and 0.3mL of strong acid, and then stirred and reacted at 40°C for 4 hours at a stirring speed of 400r / m; the obtained product was centrifuged, and then washed with ethanol for 6 times to obtain a hollow bowl-shaped tin dioxide com...

Embodiment 2

[0025] This embodiment includes the following steps:

[0026] The first step: Weigh 0.5g of hollow bowl-shaped polystyrene microspheres into a flask, add 40mL of concentrated sulfuric acid with a mass concentration of 98%, ultrasonically disperse for 15 minutes, and then stir and react at 80°C for 6 hours to obtain the sulfuric acid The polystyrene microspheres were washed with ethanol until neutral, and dried for later use. The ultrasonic power is 250W; the stirring speed is 400r / m.

[0027] Step 2: Weigh 10 mg of the hollow bowl-shaped sulfonated polystyrene microspheres prepared above and add them to 120 mL of deionized water, ultrasonically disperse for 10 minutes, then add 36.2 mg of sodium citrate and 177.5 mg of hexamethylenetetramine in sequence, 177.5 mg of zinc nitrate was stirred and reacted in an oil bath at 90°C for 6 hours, and the obtained product was washed 5 times with ethanol to obtain a hollow bowl-shaped precursor of sulfonated zinc oxide composite materia...

Embodiment 3

[0030] This embodiment includes the following steps:

[0031] The first step: Weigh 1g of hollow bowl-shaped polystyrene balls into a flask, add 50mL of concentrated sulfuric acid with a mass concentration of 98%, ultrasonically disperse for 15 minutes, and then stir and react at 80°C for 6 hours to obtain the sulfonated polystyrene Styrene microspheres were washed with ethanol until neutral and dried for later use. The ultrasonic power is 250W; the stirring speed is 400r / m.

[0032] Step 2: Weigh 50 mg of hollow bowl-shaped sulfonated polystyrene microspheres, add them to 400 mL of deionized water, disperse ultrasonically for 10 minutes, then add 72.5 mg of sodium citrate, 355 mg of hexamethylenetriamine, and 750 mg of nickel sulfate , stirred and reacted in an oil bath at 90°C for 6 hours, and the obtained product was washed with ethanol for 5 times to obtain a hollow bowl-shaped precursor of nickel oxide composite material.

[0033] The third step: calcinate the product i...

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Abstract

The invention discloses a preparation method of a hollow bowl-shaped carbon-based metal oxide composite material. The preparation method comprises the following steps: preparing a precursor of the hollow bowl-shaped carbon-based metal oxide composite material through a precipitation method; carrying out calcination carbonation to obtain a hollow bowl-shaped carbon-based metal oxide composite lithium storage active material; preparing component and structure controllable composite by adjusting the ratio among a template, metal salt, hexamethylenetetramine and citrate, so as to realize the purpose of controllable electrochemical performance. The preparation method has the characteristic that a hollow bowl-shaped polystyrene micro ball template is adopted and hollow bowl-shaped carbon-based metal oxide composite materials of various components are prepared through a common method; not only does the material of the shape reserve all the advantages of a hollow structure material, more importantly, the problem that the space utilization rate of the hollow material is low, is solved; the filling density of the active material is improved; the volume energy density is extremely improved; thus the energy density, capacity, cycle performance and magnification performance of a single cell are improved.

Description

technical field [0001] The present invention relates to the preparation of energy storage materials, in particular to a method for preparing a hollow bowl-shaped carbon-based metal oxide composite material for lithium-ion battery negative electrodes, specifically tin dioxide, zinc oxide, nickel oxide, tricobalt tetroxide, trioxide Ferric iron, ferroferric oxide, manganese dioxide, zinc manganate, ferric manganate, cobalt manganate, nickel manganate, nickel cobaltate, nickel sub-cobaltate, iron cobaltate, nickel cobaltate, cobalt ferrite and hollow Preparation of bowl-shaped carbon hollow microsphere composites. technical background [0002] As a new type, clean and rechargeable power source, lithium-ion battery has the advantages of high working voltage, high energy density, light weight and low self-discharge rate, and has been widely used in portable electronic devices such as mobile phones and notebook computers. . The widely used electrode material in lithium ion has b...

Claims

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Application Information

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IPC IPC(8): H01M4/1391H01M4/62H01M4/1399
CPCH01M4/362H01M4/483H01M4/625H01M10/0525Y02E60/10
Inventor 丁书江梁瑾
Owner XI AN JIAOTONG UNIV
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