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Biomass/carbon nanotube induced Fe3O4 nano composite material and application thereof as lithium ion battery negative electrode material

A technology of nanocomposite materials and carbon nanotubes, applied in the direction of active material electrodes, battery electrodes, negative electrodes, etc., to achieve the effect of alleviating volume change, good electrochemical performance, improving conductivity and cycle performance

Pending Publication Date: 2021-04-30
LIAONING UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although it has been reported that Fe 3 o 4 case of recombination with CNTs, but Fe 3 o 4 A case of three-phase composite with CNTs and biomass-derived carbon

Method used

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  • Biomass/carbon nanotube induced Fe3O4 nano composite material and application thereof as lithium ion battery negative electrode material
  • Biomass/carbon nanotube induced Fe3O4 nano composite material and application thereof as lithium ion battery negative electrode material
  • Biomass/carbon nanotube induced Fe3O4 nano composite material and application thereof as lithium ion battery negative electrode material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] (1) Fe induced by biomass / carbon nanotubes 3 o 4 Nanocomposite (Fe 3 o 4 / CNTs / C), the preparation method is as follows:

[0047] 1) Grind the dried ash samara peel into powder, weigh 2.5g of ash samara powder, add it to 50mL potassium hydroxide solution with a concentration of 50mg / mL for activation, and stir magnetically at 80°C for 4h. After filtering, the ash samara peel powder after the activation treatment was vacuum-dried at 80° C. for 12 hours. Then it was placed in a tube furnace under an argon atmosphere and calcined at 800°C for 2 hours. The obtained product was washed with hydrochloric acid and distilled water to be neutral, vacuum-dried at 80°C for 12 hours, and ground to obtain the target product carbonized ash samara.

[0048] 2) Slowly add 6 mL of 30% hydrogen peroxide dropwise into a mixed solution of 0.6 g of CNTs and 14 mL of concentrated sulfuric acid, with continuous stirring. After cooling down to room temperature, start heating, and oxidize w...

Embodiment 2

[0056] (1) Fe induced by biomass / carbon nanotubes 3 o 4 Nanocomposite (Fe 3 o 4 / CNTs / C), the preparation method is as follows:

[0057] 1) Grind the dried ash samara peel into powder, weigh 2.5g of ash samara powder, add it to 50mL potassium hydroxide solution with a concentration of 50mg / mL for activation, and stir magnetically at 80°C for 4h. After filtering, the ash samara peel powder after the activation treatment was vacuum-dried at 80° C. for 12 hours. Then it was placed in a tube furnace under an argon atmosphere and calcined at 800°C for 2 hours. The obtained product was washed with hydrochloric acid and distilled water to be neutral, vacuum-dried at 80°C for 12 hours, and ground to obtain the target product carbonized ash samara.

[0058] 2) Slowly add 6 mL of 30% hydrogen peroxide dropwise into a mixed solution of 0.6 g of CNTs and 14 mL of concentrated sulfuric acid, with continuous stirring. After cooling down to room temperature, start heating, and oxidize w...

Embodiment 3

[0061] (1) Fe induced by biomass / carbon nanotubes 3 o 4 Nanocomposite (Fe 3 o 4 / CNTs / C), the preparation method is as follows:

[0062] 1) Grind the dried ash samara peel into powder, weigh 2.5g of ash samara powder, add it to 50mL potassium hydroxide solution with a concentration of 50mg / mL for activation, and stir magnetically at 80°C for 4h. After filtering, the ash samara peel powder after the activation treatment was vacuum-dried at 80° C. for 12 hours. Then it was placed in a tube furnace under an argon atmosphere and calcined at 800°C for 2 hours. The obtained product was washed with hydrochloric acid and distilled water to be neutral, vacuum-dried at 80°C for 12 hours, and ground to obtain the target product carbonized ash samara.

[0063]2) Slowly add 6 mL of 30% hydrogen peroxide dropwise into a mixed solution of 0.6 g of CNTs and 14 mL of concentrated sulfuric acid, with continuous stirring. After cooling down to room temperature, start heating, and oxidize wi...

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Abstract

The invention discloses a biomass / carbon nanotube induced Fe3O4 nano composite material and application thereof as a lithium ion battery negative electrode material. The biomass derived carbon / carbon nanotube / Fe3O4 composite material is prepared by a one-step hydrothermal method. A universal method for preparing the conductive metal oxide nanospheres by inducing the carbon material is developed. The biomass porous carbon material is fraxinus chinensis wing peel, is easy to obtain and is environment friendly, and contains a large amount of lignin, and the lignin is a good carbon source. Besides, the carbon nanotubes have good conductivity, and the conductivity of the composite material can be improved; meanwhile, the carbon nanotubes, the biomass-derived carbon and the Fe3O4 form a skeleton structure, the volume expansion of Fe3O4 is relieved, and the skeleton structure has important significance in promoting electron transfer in electrochemical reaction. Therefore, the biomass-derived carbon / carbon nanotube and Fe3O4 composite material has an important application prospect.

Description

technical field [0001] The invention relates to the technical field of lithium-ion batteries, in particular to a novel negative electrode material for lithium-ion batteries—biomass / carbon nanotube-induced Fe 3 o 4 Preparation and application of nanocomposites. Background technique [0002] Lithium-ion batteries have higher energy density, longer cycle life, and wider operating potential range than traditional batteries, and are widely used as power sources for various electronic devices and as the main power source for electric vehicles. At present, graphite materials are widely used as mainstream lithium-ion battery anode materials due to their low resistivity, low price, and abundant reserves. However, the theoretical specific capacity of graphite materials is low (372mAh / g), which severely limits the application of graphite anodes in high energy density devices. Therefore, finding anode materials with higher energy density is one of the main tasks for the development o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/52H01M4/583H01M10/0525B82Y30/00
CPCH01M4/362H01M4/52H01M4/583H01M10/0525B82Y30/00H01M2004/027Y02E60/10
Inventor 葛昊田阳尚婷婷郭欣
Owner LIAONING UNIVERSITY
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