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Preparation method of sulphur-containing polyacrylonitrile battery anode material

A polyacrylonitrile battery and positive electrode material technology, which is applied in battery electrodes, circuits, electrical components, etc., can solve the problems of limiting the application of organic sulfides, difficulty in large-scale production, and complicated processes, and achieves excellent electrochemical performance and easy industrialization. The effect of chemicalization and simple process

Inactive Publication Date: 2010-08-11
CHERY AUTOMOBILE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this material needs to react at high temperature and has poor electrical conductivity, which limits the application of these organosulfides.
[0007] In short, in the existing synthetic methods, there are disadvantages such as complex process, high cost, difficulty in large-scale production, etc.

Method used

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  • Preparation method of sulphur-containing polyacrylonitrile battery anode material
  • Preparation method of sulphur-containing polyacrylonitrile battery anode material

Examples

Experimental program
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Effect test

Embodiment 1

[0023] (1) Preparation of nano precursors by suspension polymerization

[0024] Add 100ml of distilled water and 0.15g of dispersant (PVA) into a four-necked reaction flask equipped with a powerful electric stirrer, condenser and thermometer. The dispersant is polyvinyl alcohol. After the PVA is dissolved, control the temperature at 65°C. Then add 5ml of dimethylformamide, 25ml of acrylonitrile monomer, and 9g of sublimed sulfur in sequence, blow nitrogen gas, control the reaction temperature and stirring speed, and gradually add 0.3g of initiator. The initiator is azobisisobutyronitrile. Suspension polymerization. After 4 hours of reaction, the polymerization was terminated, and the polymer suspension was filtered and washed several times, and dried sufficiently at 60° C. to obtain a nano-sulfur-containing polyacrylonitrile precursor.

[0025] (2) Thermal recombination of precursor

[0026] The precursor obtained in step (1) is heated at a heating rate of 9°C / min under the protect...

Embodiment 2

[0028] (1) Preparation of nano precursors by suspension polymerization

[0029] Add 100ml of distilled water and 0.1g of PVA to a four-necked reaction flask equipped with a powerful electric stirrer, condenser and thermometer. After the PVA is dissolved, control the temperature at 80°C, and then add 7ml of dimethylformamide and propylene. 30ml of nitrile monomer, 12g of sublimed sulfur, nitrogen gas, control the reaction temperature and stirring speed, gradually add 0.3g of azobisisoheptonitrile to carry out suspension polymerization. After 6 hours of reaction, the polymerization is terminated, and the polymer slurry is filtered and washed several times, and fully dried at 80° C. to obtain a nano-sulfur-containing polyacrylonitrile precursor.

[0030] (2) Thermal recombination of precursor

[0031] The precursor obtained in step (1) is heated at a heating rate of 9°C / min under the protection of argon, and calcined at a constant temperature of 450°C for 6 hours to obtain a sulfur-con...

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Abstract

The invention relates to a preparation method of a sulphur-containing polyacrylonitrile battery anode material with simple technology, low cost and easy industrialization. The technical scheme of the preparation method comprises the following steps of: dissolving dispersing agent with distilled water in a reaction container; adding dimethylformamide, acrylonitrile monomer and sublimed sulfur; entering nitrogen; adding initiator; performing suspension polymerization reaction; filtering, washing and drying the polymerized slurry to obtain sulphur-containing polyacrylonitrile precursor; and roasting the sulphur-containing polyacrylonitrile precursor under the protection of inert gas with constant temperature to obtain the sulphur-containing polyacrylonitrile battery anode material.

Description

Technical field [0001] The invention relates to a preparation method of sulfur-containing polyacrylonitrile battery cathode material. Background technique [0002] As a cathode material for lithium batteries, elemental sulfur has the advantages of high specific capacity, low toxicity, and low price. The specific capacity can be as high as 1675mAh / g, the theoretical voltage is 2.287v, and the theoretical energy density is 3824Wh / kg. It can be said to be an ultra-high-energy material. It has the highest specific capacity among the currently known cathode materials. Therefore, it has attracted people's attention very early. Due to global energy problems, such a high specific energy is very attractive. Based on the advantages of low equivalent ratio and low price, elemental sulfur has been favored in the field of energy storage material research. received widespread attention. [0003] A positive electrode with 100% sulfur content in a lithium-sulfur battery cannot be charged ...

Claims

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Application Information

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IPC IPC(8): H01M4/1399
CPCY02E60/122Y02E60/10
Inventor 朱广燕
Owner CHERY AUTOMOBILE CO LTD
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