Molybdenum disulfide/tin disulfide/graphene composite and preparation method thereof

A technology of tin disulfide and molybdenum disulfide, which is applied in the field of molybdenum disulfide/tin disulfide/graphene composite materials and its preparation, can solve the problems of large volume change rate, poor high-rate performance, self-structural damage, etc., to achieve Inhibit agglomeration, improve electrical conductivity, and relieve pulverization

Inactive Publication Date: 2018-09-14
CHINA JILIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Based on the problems in the prior art that the lithium (sodium) ion battery electrode material has a large volume change rate in the electrochemical reaction, resulting in the destruction of its own structure and poor high-rate performance caused by its inherent low electrical conductivity

Method used

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  • Molybdenum disulfide/tin disulfide/graphene composite and preparation method thereof
  • Molybdenum disulfide/tin disulfide/graphene composite and preparation method thereof
  • Molybdenum disulfide/tin disulfide/graphene composite and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0033] Take 800mg of graphite powder and 800mg of sodium nitrate in a magnetic stirrer and dissolve them in 50mL of concentrated sulfuric acid in an ice-water bath in turn, and continue to stir to dissolve them completely; after heating up to 30°C, add 4g of potassium permanganate and continue to stir for 4 hours; continue to stir Next, 100 mL of deionized water and 5 mL of hydrogen peroxide were sequentially added, washed four times with 0.5 M dilute hydrochloric acid and deionized water, respectively, and freeze-dried for 12 hours to obtain graphene oxide.

[0034] Take 20 mg of the graphene oxide prepared by the above method and add it into 60 mL of deionized water, and disperse it ultrasonically for 30 minutes; then add 710 mg of tin tetrachloride pentahydrate under magnetic stirring, and keep stirring for 1 hour to completely dissolve it; add 242 mg of dihydrate under constant stirring Sodium molybdate, and continue to stir for 1 h to completely dissolve; add 700 mg of thi...

Embodiment 2

[0037] Take 800mg of graphite powder and 800mg of sodium nitrate in a magnetic stirrer and dissolve them in 50mL of concentrated sulfuric acid in an ice-water bath in turn, and continue to stir to dissolve them completely; after heating up to 30°C, add 4g of potassium permanganate and continue to stir for 4 hours; continue to stir Next, 100 mL of deionized water and 5 mL of hydrogen peroxide were sequentially added, washed four times with 0.5 M dilute hydrochloric acid and deionized water, respectively, and freeze-dried for 12 hours to obtain graphene oxide.

[0038]Take 40 mg of the graphene oxide prepared by the above method and add it into 60 mL of deionized water, and ultrasonically disperse for 30 minutes; then add 710 mg of tin tetrachloride pentahydrate under magnetic stirring, and continue stirring for 1 hour to completely dissolve; add 242 mg of dihydrate under constant stirring Sodium molybdate, and continue to stir for 1 h to completely dissolve; add 700 mg of thioac...

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Abstract

The invention discloses a molybdenum disulfide / tin disulfide / graphene composite and a preparation method thereof. Molybdenum disulfide / tin disulfide grows on the surface of graphene in a manner of horizontal interface contact growth; with graphene oxide as a carbon source, tin chloride pentahydrate as a tin source, sodium molybdate dihydrate as a molybdenum source and thioacetamide as a sulfur source, the carbon source, tin source, molybdenum source and sulfur source are added sequentially into deionized water and heated at 200 DEG C for 16h to synthesize the molybdenum disulfide / tin disulfide / graphene composite. The molybdenum disulfide / tin disulfide / graphene composite has a stable structure and high electrical conductivity, and has the advantages of large specific surface area and excellent electrochemical performance; the preparation method has low requirements on reaction conditions, simple operation, high yield and good repeatability.

Description

technical field [0001] The invention belongs to the field of lithium (sodium) ion battery negative electrode materials in new energy materials, and specifically relates to a molybdenum disulfide / tin disulfide / graphene composite material and a preparation method thereof. Background technique [0002] With the rapid development of mobile electronic devices, children's toys, electric vehicles, aerospace and other fields, higher and higher requirements are placed on the performance of batteries. However, traditional nickel-hydrogen batteries, nickel-cadmium batteries and lead-acid batteries are destined to be eliminated due to shortcomings such as short service life, low energy density, and serious environmental pollution. Lithium (sodium) ion batteries can overcome these shortcomings and have great room for improvement. The key factor lies in the selection and design of electrode materials. [0003] Among the traditional electrode materials, the commercial lithium-ion battery ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/58H01M4/583H01M4/62H01M10/0525C01B32/182
CPCC01B32/182H01M4/362H01M4/58H01M4/583H01M4/62H01M10/0525Y02E60/10
Inventor 梁培满晓磊胡陈力
Owner CHINA JILIANG UNIV
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