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A kind of positive electrode material of lithium-sulfur battery and preparation method thereof

A positive electrode material, lithium-sulfur battery technology, applied in the direction of battery electrodes, nanotechnology for materials and surface science, circuits, etc., can solve the problems of limited ability to adsorb active substance sulfur, poor conductivity, etc., to achieve inhibition of dissolution, high Utilization rate, greatly improved effect

Active Publication Date: 2015-08-12
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention aims at the application of the porous carbon and sulfur composite positive electrode material in the prior art, which has limited ability to adsorb active substance sulfur and poor conductivity, so that its application in batteries is limited. Lithium-sulfur battery cathode materials with high rate performance and high cycle performance

Method used

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  • A kind of positive electrode material of lithium-sulfur battery and preparation method thereof
  • A kind of positive electrode material of lithium-sulfur battery and preparation method thereof
  • A kind of positive electrode material of lithium-sulfur battery and preparation method thereof

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Effect test

Embodiment 1

[0030] 1.046g Zn(NO 3 ) 2 4H 2 O and 0.432g terphenyl terephthalic acid are added to 30mL organic solvent dimethylformamide (DMF), and a certain amount of surfactant polyethylene glycol (PEG) is added thereto, and the surfactant polyethylene glycol (PEG ) accounted for 1% by weight of the precursor solution, and a certain amount of multi-walled carbon nanotubes was added to it, and the weight ratio of multi-walled carbon nanotubes to the multi-walled carbon nanotube-embedded mesoporous metal-organic framework composite material was 5%. The reaction precursor solution was isolated from the air and ultrasonically treated for 0.5h. After the precursor solution was mixed evenly, the precursor solution was transferred to a polytetrafluoroethylene-lined reactor by solvothermal method; the solution was heated from room temperature at 10°C / min Heated to 155°C and kept for 48 hours; after the solution was cooled to room temperature, the crystals were washed with dimethylformamide (D...

Embodiment 2

[0034] 1.668g Zn(NO 3 ) 2 ·6H 2 O and 0.222g of terephthalic acid are added to 30mL of organic solvent dimethylformamide (DMF), and a certain amount of surfactant polyethylene glycol (PEG) is added to it, and the surfactant polyethylene glycol (PEG) The amount of adding accounted for 2% by weight of the precursor solution, adding a certain amount of multi-walled carbon nanotubes to it, the amount of added multi-walled carbon nanotubes accounted for the weight of the multi-walled carbon nanotubes inlaid mesoporous metal organic framework composite material The ratio is 5%. The reaction precursor solution was isolated from the air and ultrasonically treated for 0.5h. After the precursor solution was mixed evenly, the precursor solution was transferred to a polytetrafluoroethylene-lined reactor by solvothermal method; the solution was transferred from Heating at room temperature to 110°C and keeping it for 24 hours; after the solution was cooled to room temperature, the crysta...

Embodiment 3

[0036] 1.046g Zn(NO 3 ) 2 4H 2 O and 0.432g terphenyl terephthalic acid are added to 30mL organic solvent dimethylformamide (DMF), and a certain amount of surfactant polyethylene glycol (PEG) is added thereto, and the surfactant polyethylene glycol (PEG ) accounted for 1% by weight of the precursor solution, and a certain amount of multi-walled carbon nanotubes was added to it, and the amount of multi-walled carbon nanotubes accounted for 1% of the multi-walled carbon nanotube-embedded mesoporous metal-organic framework composite. 30% by weight. The reaction precursor solution was isolated from the air and ultrasonically treated for 0.5h. After the precursor solution was mixed evenly, the precursor solution was transferred to a polytetrafluoroethylene-lined reactor by solvothermal method; the solution was transferred from Heating at room temperature to 155°C and keeping it for 48 hours; after the solution was cooled to room temperature, the crystals were washed with dimethy...

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Abstract

The invention discloses an anode material of a lithium-sulfur battery and a preparation method thereof. The anode material is formed by the compounding of elementary sulfur and porous three-dimensional grading carbon. The preparation method comprises the steps of preparing a precursor compound of the porous three-dimensional grading carbon with a solvothermal method, carbonizing to obtain the porous three-dimensional grading carbon, then compounding with the sulfur to obtain the anode material of the lithium-sulfur battery. The preparation method is simple and low in cost, the prepared anode material of the lithium-sulfur battery has high sulfur containing capability, and high ion transmission capability and conductivity, and can improve the high-rate capability and the high cycle performance of the lithium-sulfur battery.

Description

technical field [0001] The invention relates to a lithium-sulfur battery cathode material and a preparation method thereof, belonging to the field of new energy. Background technique [0002] With the development of human society, problems such as energy shortage and environmental pollution have become increasingly prominent, and people's understanding and requirements for chemical power sources have become higher and higher, prompting people to continuously explore new energy storage systems based on chemical power sources. Lithium metal-based batteries have led the development of high-performance chemical power sources in recent decades. With the successful commercialization of lithium-ion batteries, countries around the world are stepping up research on lithium-ion power batteries for vehicles. However, due to factors such as energy density, safety, and price, conventional lithium-ion batteries such as lithium cobalt oxide, lithium manganese oxide, and lithium iron phosp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/38H01M4/62B82Y30/00
CPCY02E60/10
Inventor 张治安赖延清包维斋李劼
Owner CENT SOUTH UNIV
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