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Method for preparing conjugated polymer polythio anthracene

A conjugated polymer, polythioanthene technology, applied in structural parts, electrical components, battery electrodes, etc., can solve problems such as poor cyclability, and achieve the effects of simplifying preparation steps, saving time, and easy mass production

Inactive Publication Date: 2009-07-08
WUHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the problem of poor cycle performance of lithium secondary batteries in the prior art, the present invention provides a new type of material that can be used as the positive electrode active material of lithium secondary batteries—conjugated polymer polysulfanthene, and simultaneously provides its Preparation method and application, conjugated polymer polythioanthene is a lithium secondary battery cathode active material with high charge-discharge specific capacity and good cycle performance, and the preparation method is simple and easy

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Weigh 2.8 g of refined anthracene and 7.7 g of sublimed sulfur into a 100 ml three-neck flask. The flask is equipped with a stirrer, a condenser, and a nitrogen inlet tube. The flask was placed on a heated and stirred reactor. In order to prevent hydrogen sulfide from escaping, the reaction gas is introduced into a water tank with a pipe connected to the condenser to absorb the hydrogen sulfide released by the reaction. Nitrogen was passed for 5 minutes before the reaction, stirring was started and the temperature was gradually raised. After 80 minutes, the reaction temperature was raised to 300° C., and the reaction was carried out at this temperature. It was observed that a large amount of gas was emitted, and the liquid reaction system was solidified. After continuing the reaction for 7 hours while maintaining the reaction temperature, the reaction was terminated. After cooling, dismantle the reaction device, take it out and pulverize it, and extract it with carbon...

Embodiment 2

[0018] Weigh 1 g of refined anthracene and 6 g of sublimed sulfur into a 50 ml three-neck flask. The flask was equipped with a thermometer, condenser, nitrogen inlet and placed on a heated and stirred reactor. The connecting pipe on the upper end of the condensing pipe introduces the reaction gas into a water tank to absorb the hydrogen sulfide released by the reaction with water. Flow nitrogen for 5 minutes before the reaction, then start stirring and gradually increase the temperature, gradually increase the reaction temperature to 280°C after 30 minutes, and then rise to 330°C after 30 minutes, keep the reaction temperature at this temperature, continue the reaction for 4 hours, then stop the reaction . Remove the reaction device after cooling, the reaction product in the reaction bottle is a black solid with metallic luster, take it out and weigh it, and get 4.4 grams of the product. After pulverizing the obtained polysulfanthracene, extract it with carbon disulfide in a ...

Embodiment 3

[0021] Weigh 3 g of refined anthracene and 8.9 g of sublimed sulfur into a 100 ml three-neck flask. The flask was equipped with a thermometer, condenser, nitrogen inlet and placed on a heated and stirred reactor. The connecting pipe on the upper end of the condensing pipe introduces the reaction gas into a water tank to absorb the hydrogen sulfide released by the reaction with water. Nitrogen was passed for 5 minutes before the reaction, then began to stir and gradually increased the temperature, and the reaction temperature was gradually raised to 280° C. after 70 minutes, and then rose to 310° C. after 10 minutes. The reaction temperature was maintained, and after 3 hours of continuous reaction, the reaction was stopped. After cooling, the reaction device was dismantled. The reaction product in the reaction bottle was a black solid with metallic luster. It was taken out and weighed to obtain 8.9 grams of the product. After the obtained polysulfanthracene was pulverized, it w...

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Abstract

This invention discloses a conjugated polymer polythioanthracene and its preparing method and use. Polythioanthracene main chain is composed of anthracene rings, side chain of sulfide-sulfide linkages, its formula is [AnSx]m, wherein An presents anthracene ring, S presents elemental sulfur, x value is 6-10, m value is 10-50. Polythioanthracene directly reacts from anthracene and simple substance sulfur under solventfree and higher temperature to obtain multiple thioanthracene, then making it treated by ferric chloride to obtain conjugated polymer polythioanthracene. Its main chain is composed of anthracene rings, side chain of sulfide-sulfide linkages. It can be anode active material of lithium secondary cell with high charge-discharge specific capacity, good cycle performance and non-toxic pollution free environment. Preparation of polythioanthracene uses anthracene and simple substance sulfur as raw material, its material resource is rich; leaving out complex reaction for inducing double active functional group to aromatic ring, and simple process and low production cost.

Description

Technical field [0001] The invention relates to a method for preparing conjugated polymer polythioanthene, which belongs to the field of functional materials and energy materials. Background technique [0002] Batteries (secondary batteries) that can be repeatedly charged and discharged are widely used as energy sources in mobile phones, portable computers, satellites, electric vehicles and other equipment, involving various fields such as national defense, science and technology, and people's daily life. Lithium secondary batteries are considered to be one of the most promising storage battery systems, because metallic lithium as a negative electrode material has a specific capacity of 3861 Ah / kg, and if a matching positive electrode material can be found, the energy density of the battery may be greatly increased. Therefore, the specific capacity of positive electrode active materials has become a bottleneck in the development of lithium secondary batteries. [0003] Elem...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G75/00H01M4/60
CPCY02E60/10
Inventor 詹才茂刘之菊周运鸿孔令波
Owner WUHAN UNIV
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