Fe3O4-graphite composite nanometer material and preparation method thereof and application of Fe3O4-graphite composite nanometer material in lithium ion battery

A technology of composite nanomaterials and ferroferric oxide, which is applied in the direction of battery electrodes, nanotechnology, nanotechnology, etc., can solve the problems of potential safety hazards, long preparation routes, industrial mass production and preparation, etc., to achieve enhanced conductivity and good circulation Performance, the effect of improving the magnification performance

Active Publication Date: 2017-02-22
GUANGDONG ORIENT RESIN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the hydrothermal method also has some unfavorable factors. The preparation route is too long, and the conditions of high temperature and high pressure are not conducive to industrial mass production and preparation, and at the same time, it has great safety hazards.

Method used

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  • Fe3O4-graphite composite nanometer material and preparation method thereof and application of Fe3O4-graphite composite nanometer material in lithium ion battery
  • Fe3O4-graphite composite nanometer material and preparation method thereof and application of Fe3O4-graphite composite nanometer material in lithium ion battery
  • Fe3O4-graphite composite nanometer material and preparation method thereof and application of Fe3O4-graphite composite nanometer material in lithium ion battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Weigh 7.0g potassium ferrate, 3.0g graphite, 250g zirconium balls (grinding medium), add them to a ball mill tank, stir evenly by hand, and then use a planetary ball mill at 500rpm to ball mill for 60 hours. The product is filtered, washed with water, and kept at a constant temperature. Drying in a drying box at 60° C. for 12 hours, and finally grinding into powder to obtain ferroferric oxide / graphite composite nano-material.

[0040] Mix and grind 0.200g ferroferric oxide / graphite composite nanomaterials, 0.025g PVDF (polyvinylidene fluoride) and 0.025g carbon black, and then add 1ml NMP (N-methylpyrrolidone) and continue grinding for 0.5h to obtain the slurry The material was uniformly coated on the copper foil, dried for 12 hours to form an electrode, and the lithium sheet was used as the counter electrode to assemble a CR2016 button battery for electrochemical performance testing.

Embodiment 2

[0042] Weigh 8.0g potassium ferrate, 2.0g graphite, 250g zirconium balls (grinding medium), add them to a ball milling tank, stir evenly by hand, and then use a planetary ball mill to ball mill at 400 rpm for 48 hours. The product is filtered, washed with water, and kept at a constant temperature. Drying in a drying box at 60° C. for 12 hours, and finally grinding into powder to obtain ferroferric oxide / graphite composite nano-material.

[0043] Mix and grind 0.200g ferroferric oxide / graphite composite nanomaterials, 0.025g PVDF (polyvinylidene fluoride) and 0.025g carbon black, and then add 1ml NMP (N-methylpyrrolidone) and continue grinding for 0.5h. The slurry was uniformly coated on the copper foil and dried for 12 hours to form an electrode. The lithium sheet was used as the counter electrode to assemble a CR2016 button cell, and the electrochemical performance test was performed.

Embodiment 3

[0045] Weigh 8.5g potassium ferrate, 1.5g graphite, 250g zirconium balls (grinding medium), add them to a ball mill tank, stir by hand, and then use a planetary ball mill to ball mill at 400 rpm for 48 hours. The product is filtered, washed with water, and kept at a constant temperature. Drying in a drying box at 60° C. for 12 hours, and finally grinding into powder to obtain ferroferric oxide / graphite composite nano-material.

[0046] Mix and grind 0.200g ferroferric oxide / graphite composite nanomaterials, 0.025g PVDF (polyvinylidene fluoride) and 0.025g carbon black, and then add 1ml NMP (N-methylpyrrolidone) and continue grinding for 0.5h. The slurry was uniformly coated on the copper foil and dried for 12 hours to form an electrode. The lithium sheet was used as the counter electrode to assemble a CR2016 button cell, and the electrochemical performance test was performed.

[0047] The ferroferric oxide / graphite composite nano material obtained in this embodiment has a current d...

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Abstract

The invention discloses a Fe3O4-graphite composite nanometer material and a preparation method thereof and application of the Fe3O4-graphite composite nanometer material in a lithium ion battery, and belongs to the technical field of lithium ion battery electrode materials. The preparation method includes the following steps: using graphite and potassium ferrate as raw materials, and then adding zirconium balls in the raw materials; at a speed of 300-500rpm, conducting ball milling by a planetary ball mill for 12-60 hours; conducting product separation, filtration, washing and drying to obtain the Fe3O4-graphite composite nanometer material. The material is applied in a lithium ion battery cathode and has excellent electrical properties; under the condition of the current density of 200 mA g<-1>, the material can keep a reversible capacity of 970 mAh g<-1> after circulation for 100 turns, the reversible capacity reaches 1132 mAh g<-1)> after circulation for 250 turns, and under the condition of large current density (1000 mA g <-1>), the reversible capacity can still keep at about 650 mAh g<-1> after circulation for 200 turns.

Description

Technical field [0001] The invention belongs to the technical field of lithium ion battery electrode materials, and specifically relates to a ferroferric oxide / graphite composite nano material, a preparation method thereof, and application in a lithium ion battery. Background technique [0002] Energy and the environment have become the most pressing issues in the 21st century. Facing the depletion of fossil energy and the deteriorating environmental problems, new energy has gradually stepped onto the stage of history. Among them, secondary batteries represented by lithium ion batteries have received extensive attention and have been applied in many fields. However, there are still many problems with lithium-ion batteries, such as low battery capacity, short cycle life, and poor rate performance. In order to meet the needs of the market, the development of lithium-ion battery anode materials with high capacity, long life, excellent rate performance, and low cost and environmenta...

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
CPCB82Y30/00H01M4/364H01M4/52H01M4/583H01M10/0525Y02E60/10
Inventor 吴松平黄明保陈彩虹
Owner GUANGDONG ORIENT RESIN
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