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A kind of phosphorus-carbon composite material and its preparation method and application

A carbon composite material and composite material technology, applied in structural parts, electrical components, battery electrodes, etc., can solve the problems of low Coulomb efficiency, low capacity, and poor cycle stability in the first cycle, achieve excellent cycle stability, and alleviate volume expansion. , the effect of excellent contact

Active Publication Date: 2019-08-27
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The invention provides a phosphorus-carbon composite material, which overcomes the defects of low first cycle coulombic efficiency, low capacity and poor cycle stability of current sodium battery negative electrode materials

Method used

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  • A kind of phosphorus-carbon composite material and its preparation method and application
  • A kind of phosphorus-carbon composite material and its preparation method and application
  • A kind of phosphorus-carbon composite material and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Mill micron red phosphorus with an average particle size of 5 μm, sodium alginate, and polyvinylpyrrolidone in an argon-protected ball mill for 24 hours. The frequency of the ball mill is 40 Hz. It is 10:1:1. Disperse graphite flakes and carbon nanotubes in an aqueous solution. The mass ratio of micron red phosphorus to graphite flakes and carbon nanotubes is 5:3.5:0.5. Add the dispersed graphite flake suspension into a ball mill tank and mill for 3 hours. The frequency is 25Hz. The obtained slurry is shaped by an open spray dryer. The atomizer of the spray dryer is a two-fluid atomizer, the gas used is air, the inlet temperature is 160°C, the outlet temperature is 100°C, and the airflow The temperature was 6 L / min, the feed rate was 25 r / min, and the obtained phosphorus-carbon composite material was dried at 180° C. in an argon atmosphere for 2 hours, and the temperature increase rate was 10° C. / min.

[0024] The phosphorus-carbon negative electrode material prepared...

Embodiment 2

[0027] Mill micron red phosphorus with an average particle size of 5 μm, sodium alginate, and polyvinylpyrrolidone in an argon-protected ball mill for 24 hours. The frequency of the ball mill is 40 Hz. It is 10:0.5:0.5. Disperse graphite flakes and carbon nanotubes in an aqueous solution. The mass ratio of micron red phosphorus to graphite flakes and carbon nanotubes is 5:4:0.5. Add the dispersed graphite flake suspension into a ball mill tank and mill for 3 hours. The frequency is 25Hz. The obtained slurry is shaped by an open spray dryer. The atomizer of the spray dryer is a two-fluid atomizer, the gas used is air, the inlet temperature is 160°C, the outlet temperature is 100°C, and the airflow The temperature was 6 L / min, the feed rate was 25 r / min, and the obtained phosphorus-carbon composite material was dried at 180° C. in an argon atmosphere for 2 hours, and the temperature increase rate was 10° C. / min.

[0028] The test method is the same as in Example 1, and the bat...

Embodiment 3

[0030] Mill micron red phosphorus with an average particle size of 5 μm, sodium alginate, and polyvinylpyrrolidone in an argon-protected ball mill for 24 hours. The frequency of the ball mill is 40 Hz. It is 10:1.5:1.5. Disperse graphite flakes and carbon nanotubes in an aqueous solution. The mass ratio of micron red phosphorus to graphite flakes and carbon nanotubes is 5:3:0.5. Add the dispersed graphite flake suspension into a ball mill tank and mill for 3 hours. The frequency is 25Hz. The obtained slurry is shaped by an open spray dryer. The atomizer of the spray dryer is a two-fluid atomizer, the gas used is air, the inlet temperature is 160°C, the outlet temperature is 100°C, and the airflow The temperature was 6 L / min, the feed rate was 25 r / min, and the obtained phosphorus-carbon composite material was dried at 180° C. in an argon atmosphere for 2 hours, and the temperature increase rate was 10° C. / min.

[0031]The test method is the same as in Example 1, and the batt...

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Abstract

The invention provides a phosphorous-carbon composite material and a preparation method and application thereof. The phosphorus-carbon composite material is prepared from red phosphorus, a carbon material and an additive through simple and high-efficiency mass production at a large scale and is of a porous spherical structure, wherein the red phosphorous is uniformly dispersed in the spherical phosphorous-carbon composite material in a form of nanometer phosphorous. The phosphorous-carbon composite material has the advantages of high first-circle coulombic efficiency, high cycle stability and the like when used for a sodium ion battery. The preparation method of the phosphorous-carbon composite material is simple, is cheap and available in raw materials, is easy for commercial production, and has very wide application prospect.

Description

technical field [0001] The invention relates to a preparation method of a phosphorus-carbon composite material and its application as a negative electrode material of a sodium ion battery. [0002] Background technique: [0003] Due to the shortage of oil resources and the aggravation of environmental pollution, it is increasingly important to vigorously develop clean energy. Secondary batteries have outstanding advantages such as no pollution, long service life, fast charging and discharging, etc., and have been widely used in portable electronic devices and electric vehicles. However, with the expansion of application fields and the sharp increase in usage, due to the limited and uneven distribution of metal lithium resources, lithium-ion batteries are expensive, while sodium resources are abundant, raw materials are cheap and easy to obtain, and the distribution is uniform. Ion batteries have similar properties, so sodium-ion batteries have very broad application prospect...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/36H01M4/38H01M4/583H01M4/62H01M10/054
CPCH01M4/364H01M4/38H01M4/583H01M4/62H01M10/054H01M2004/021Y02E60/10
Inventor 郭玉国徐泉李金熠孔一鸣殷雅侠
Owner INST OF CHEM CHINESE ACAD OF SCI
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