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A kind of ultra-thin layered v5s8 and its preparation method and its application in lithium-ion/sodium-ion batteries

An ultra-thin, layered technology, applied in battery electrodes, secondary batteries, circuits, etc., to achieve good application prospects, expand layer spacing, and high reproducibility

Active Publication Date: 2018-11-02
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

And there is no V in the prior art 5 S 8 The base material can be used not only as the anode material of lithium-ion battery, but also as the application report of the anode material of sodium-ion battery. Therefore, the ultra-thin layered V 5 S 8 It is a new type of energy storage material with great market prospects.

Method used

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  • A kind of ultra-thin layered v5s8 and its preparation method and its application in lithium-ion/sodium-ion batteries
  • A kind of ultra-thin layered v5s8 and its preparation method and its application in lithium-ion/sodium-ion batteries
  • A kind of ultra-thin layered v5s8 and its preparation method and its application in lithium-ion/sodium-ion batteries

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Experimental program
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Effect test

Embodiment 1

[0026] (1) Weigh 0.04 mol of vanadium pentoxide and 0.2 mol of sulfur powder, uniformly mix the raw materials with a ball mill, and press into tablets for calcination. The raw material after the tableting is in the mixed atmosphere of hydrogen and argon (H 2 The volume ratio to Ar is 5%) and sintered at 700° C. for 5 hours, and naturally cooled to room temperature to obtain product A. The product A and ethanol were uniformly mixed at a ratio of 1 g: 100 ml, ultrasonicated for 5 hours, and filtered to obtain precipitate B. Wash the precipitate B with deionized water and ethanol three times respectively, and dry it in vacuum at 60°C to obtain the finished ultra-thin layer V 5 S 8 . X-ray powder diffraction (XRD) analysis showed that the resulting product was pure V 5 S 8 , without any other impurity phase, the sample has high crystallinity. Scanning electron microscopy analysis revealed that the product V 5 S 8 It has an ultra-thin sheet structure, the diameter of the sh...

Embodiment 2

[0029](1) Weigh 0.02 mol of vanadium trioxide, 0.2 mol of thiourea and 0.001 mol of glucose, uniformly mix the raw materials with a ball mill, and press into tablets for calcination. The raw material after the tableting is in the mixed atmosphere of hydrogen and argon (H 2 The volume ratio to Ar is 8%) and sintered at 750° C. for 3 hours, and cooled naturally to room temperature to obtain product A. The product A was mixed with ethanol at a ratio of 1 g: 200 ml, ultrasonicated for 7 hours, and filtered to obtain precipitate B. The precipitate B was washed 4 times with deionized water and ethanol respectively, and dried in vacuum at 80°C to obtain the finished ultra-thin V 5 S 8 . XRD analysis showed that the obtained product was pure V 5 S 8 , without any other impurity phase, high crystallinity. According to SEM analysis, the product V 5 S 8 Has an ultra-thin layered structure, the diameter of the flake layer is 500nm, the thickness is 50nm, and V 5 S 8 The flakes w...

Embodiment 3

[0032] (1) Weigh 0.04 mol of ammonium metavanadate, 0.8 mol of thioacetamide and 0.004 mol of graphene, uniformly mix the raw materials with a ball mill, and press into tablets to prepare for calcination. The raw material after the tableting is in the mixed atmosphere of hydrogen and argon (H 2 The volume ratio of Ar to 10%) was sintered at 800° C. for 8 hours, and naturally cooled to room temperature to obtain product A. Mix product A with acetone at a ratio of 1 g: 300 ml, sonicate for 10 hours, and filter to obtain precipitate B. The precipitate B was washed 5 times with deionized water and ethanol respectively, and dried in vacuum at 90°C to obtain the finished ultra-thin layer V 5 S 8 piece. XRD analysis showed that the obtained product was pure V 5 S 8 , without any other impurity phase, the sample has high crystallinity. According to SEM analysis, the product V 5 S 8 It has an ultra-thin sheet structure, the diameter of the sheet layer is 400nm, the thickness is...

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Abstract

The invention discloses ultrathin layered V5S8, a preparing method of the ultrathin layered V5S8 and an application of the ultrathin layered V5S8 to a lithium-ion / sodium-ion battery. The preparing method includes the steps that a vanadium source, a sulfur source and a carbon source are evenly mixed, the mixture is sintered for 1-12 hours at the temperature of 600-900 DEG C under hydrogen and argon mixed atmosphere, and naturally cooled to be at the room temperature, and a product A is obtained; the product A and an organic solvent are mixed, the mixture is placed into an ultrasonic oscillator and ultrasonically treated for 2-20 hours, and sediment B can be obtained after filtering; the sediment B is washed with deionized water and ethyl alcohol for 3-5 times and placed into a vacuum drying oven to be dried at the temperature of 60 DEG C, and thin layered V5S8 nanosheets are obtained. According to the method, the source of raw materials is wide, operability is high, repeatability is high, and the requirements of practical production of the lithium-ion / sodium-ion battery can be met; meanwhile, the cycle performance and the rate performance of the material are good, the excellent electrochemical performance is shown, and industrial production can be achieved.

Description

technical field [0001] The invention belongs to the field of new energy materials, in particular to an ultra-thin layered vanadium sulfide (V 5 S 8 ) and its preparation method and application in lithium-ion / sodium-ion batteries. Background technique [0002] Lithium-ion batteries are gradually replacing nickel-cadmium batteries and nickel-metal hydride batteries because of their high energy density, long service life, and environmental protection requirements, and have become the preferred power source for portable devices such as mobile phones and notebooks. At present, the anode materials of lithium-ion batteries widely used in commercialization mainly include graphite and lithium titanate, etc., and their theoretical specific capacities are relatively low, which cannot meet the development needs of high-capacity, high-power, and long-life secondary batteries, such as electric vehicles. and power batteries for hybrid vehicles, etc. Therefore, the development and resear...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/58H01M4/1397H01M10/0525H01M10/36
CPCH01M4/1397H01M4/5815H01M10/0525H01M10/36Y02E60/10
Inventor 杨成浩欧星熊训辉刘美林
Owner SOUTH CHINA UNIV OF TECH
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