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A kind of ferroferric oxide/graphite composite nanomaterial and its preparation method and application in lithium ion battery

A composite nanomaterial, ferric tetroxide technology, applied in nanotechnology, battery electrodes, nanotechnology and other directions, can solve the problems of safety hazards, long preparation routes, industrial large-scale production and preparation, etc., to achieve enhanced electrical conductivity, good circulation performance, the effect of improving the magnification performance

Active Publication Date: 2018-10-09
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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  • A kind of ferroferric oxide/graphite composite nanomaterial and its preparation method and application in lithium ion battery
  • A kind of ferroferric oxide/graphite composite nanomaterial and its preparation method and application in lithium ion battery
  • A kind of ferroferric oxide/graphite composite nanomaterial and its preparation method and application in lithium ion battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Weigh 7.0g of potassium ferrate, 3.0g of graphite, and 250g of zirconium balls (milling medium), add them into a ball mill jar, stir them evenly by hand, and then use a planetary ball mill to mill for 60 hours at 500rpm. The product is filtered, washed with water, and then heated at a constant temperature. Dry at 60° C. for 12 hours in a drying oven, and finally grind into powder to obtain ferric oxide / graphite composite nanomaterial.

[0040] Mix and grind 0.200g ferroferric oxide / graphite composite nanomaterial, 0.025g PVDF (polyvinylidene fluoride) and 0.025g carbon black evenly, then add 1ml NMP (N-methylpyrrolidone) and continue grinding for 0.5h to obtain a slurry The materials were uniformly coated on copper foil, dried for 12 hours to make electrodes, and assembled into CR2016 button cells by using lithium sheets as counter electrodes, and the electrochemical performance tests were carried out.

Embodiment 2

[0042] Weigh 8.0g of potassium ferrate, 2.0g of graphite, and 250g of zirconium balls (milling medium), add them into a ball mill jar, stir them evenly by hand, and then use a planetary ball mill to mill at 400rpm for 48 hours. The product is filtered, washed with water, and then heated at a constant temperature. Dry at 60° C. for 12 hours in a drying oven, and finally grind into powder to obtain ferric oxide / graphite composite nanomaterial.

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

Embodiment 3

[0045] Weigh 8.5g of potassium ferrate, 1.5g of graphite, and 250g of zirconium balls (milling medium), add them into a ball mill jar, stir them evenly by hand, and then use a planetary ball mill to mill for 48 hours at 400rpm. The product is filtered, washed with water, and then heated at a constant temperature Dry at 60° C. for 12 hours in a drying oven, and finally grind into powder to obtain ferric oxide / graphite composite nanomaterial.

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

[0047] The obtained ferric oxide / graphite composite nanomaterial in the present embodiment is ...

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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 in particular relates to a ferric oxide / graphite composite nanomaterial, a preparation method thereof, and an application in lithium-ion batteries. Background technique [0002] Energy and the environment have become the most urgent issues in the 21st century. Facing the depletion of fossil energy and the deteriorating environmental problems, new energy has gradually entered 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 in 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, low cost and environmental protecti...

Claims

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Application Information

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Patent Type & Authority Patents(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