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Iron trifluoride composite material, preparation method of iron trifluoride composite material, and lithium secondary battery

A technology of ferric trifluoride and composite materials, applied in secondary batteries, battery electrodes, circuits, etc., can solve the problem of low electronic conductivity of ferric trifluoride

Inactive Publication Date: 2016-09-21
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Even so, iron trifluoride still has the problem of low electronic conductivity as a cathode material.

Method used

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  • Iron trifluoride composite material, preparation method of iron trifluoride composite material, and lithium secondary battery
  • Iron trifluoride composite material, preparation method of iron trifluoride composite material, and lithium secondary battery
  • Iron trifluoride composite material, preparation method of iron trifluoride composite material, and lithium secondary battery

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preparation example Construction

[0053] The present invention also provides a preparation method of ferric trifluoride composite material, comprising the following steps:

[0054] A) After mixing and grinding the multi-component conductive polymer powder and the ferric trifluoride powder, the ferric trifluoride composite material is obtained.

[0055] In the present invention, the selection and source of the raw materials and other optimization principles are the same as those in the aforementioned ferric trifluoride composite material, and will not be repeated here.

[0056] The definition of the multi-components in the present invention is not particularly limited, and the definition of multi-components well-known to those skilled in the art can be used. The multi-components in the present invention are multiple, such as two components or two, and in the raw material The multi-component conductive polymer powder preferably refers to a mixed powder of various conductive polymers, and the multi-component cond...

Embodiment 1

[0071] First configure the iron source FeCl with a concentration of 0.35M 3 solution with a concentration of 1.2M fluorine source NH 4 F solution, then add a small amount of lauryltrimethylammonium bromide (DTAB) powder in the polytetrafluoroethylene reactor (PTFE) equipped with iron source, and put PTFE in the DF-101S type with a rotating speed of 200r / min at the same time Stir on a magnetic stirrer at constant temperature for 2 hours; then add the fluorine source dropwise to the PTFE under stirring at a molar ratio of 4:1 to the iron source, and seal the reaction for 4 hours at room temperature; put the reaction kettle into the stirrer, Stir at 300r / min and react in an oil bath at 70°C for 22 hours to obtain a precipitate containing crystal water; wash the precipitate with absolute ethanol for 3 times, then transfer it to a 75°C drying oven with Ar for drying After cooling to room temperature for 12 hours, put it into an Ar-protected tube atmosphere furnace and dry at 200 °...

Embodiment 2

[0077] First configure the iron source FeCl with a concentration of 0.35M 3 solution with a concentration of 1.2M fluorine source NH 4 F solution, then add a small amount of lauryltrimethylammonium bromide (DTAB) powder in the polytetrafluoroethylene reactor (PTFE) equipped with iron source, and put PTFE in the DF-101S type with a rotating speed of 200r / min at the same time Stir on a magnetic stirrer at constant temperature for 2 hours; then add the fluorine source dropwise to the PTFE under stirring at a molar ratio of 4:1 to the iron source, and seal the reaction for 4 hours at room temperature; put the reaction kettle into the stirrer, Stir at 300r / min and react in an oil bath at 70°C for 22 hours to obtain a precipitate containing crystal water; wash the precipitate with absolute ethanol for 3 times, then transfer it to a 75°C drying oven with Ar for drying After cooling to room temperature for 12 hours, put it into an Ar-protected tube atmosphere furnace and dry at 200 °...

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Abstract

The invention provides an iron trifluoride composite material. The iron trifluoride composite material is composed of iron trifluoride and a multi-component conductive polymer doped and hybridized in iron trifluoride. The invention further provides a preparation method of the iron trifluoride composite material. The preparation method comprises the following steps of mixing and grinding multi-component conductive polymer powder and iron trifluoride powder, and then, thermally processing so as to obtain the iron trifluoride composite material. The conductive polymer is doped and hybridized in iron trifluoride nano-particles, such that a conductive polymer / iron trifluoride composite material is obtained; the electrochemical performance of the iron trifluoride composite material can be effectively improved; the stability, the capacity and the rate capability of a cathode material are improved; simultaneously, the problem that the iron trifluoride cathode material is low in electric conductivity can be solved well; furthermore, a one-step method provided in the invention is simple to operate and low in cost; furthermore, reaction is unnecessary to carry out in a solvent; and thus, the preparation method is more suitable for industrial mass production and application.

Description

technical field [0001] The invention relates to the technical field of lithium ion batteries, in particular to an iron trifluoride composite material, a preparation method thereof, and a lithium secondary battery. Background technique [0002] With the continuous progress of human society, people's demand for various energy sources has also greatly increased, so the development trend of various emerging energy sources is also unstoppable, and lithium secondary batteries are one of them. The rapid development of small electronic products, electric transportation equipment, reserve power, aerospace and other fields are closely related to the development of lithium secondary batteries. At this stage, there is an urgent need for higher power, longer life, higher energy density, higher capacity, A breakthrough has been made in green and environmentally friendly lithium secondary batteries. [0003] The competition in the lithium-ion battery industry is becoming increasingly fier...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/58H01M4/62H01M10/0525
CPCH01M4/362H01M4/582H01M4/624H01M10/0525Y02E60/10
Inventor 许帅军李军黄思李少芳潘春阳李雪峰
Owner GUANGDONG UNIV OF TECH
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