Ferric (III) fluoride / carbon composite material and its preparation method and application

A carbon composite material and iron trifluoride technology, applied in the field of electrochemical materials, can solve the problems of low capacity and poor conductivity of iron fluoride, and achieve the effect of increasing capacity and solving low conductivity

Inactive Publication Date: 2014-06-11
OCEANS KING LIGHTING SCI&TECH CO LTD +2
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The research of Amatucci's research group found that the reason for the low capacity is that the conductivity of ferric fluoride is too poor. Using the usual method of adding a conductive agent, FeF 3 The electrical conductivity problem still cannot be solved

Method used

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  • Ferric (III) fluoride / carbon composite material and its preparation method and application

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Experimental program
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preparation example Construction

[0022] The preparation method of above-mentioned ferric trifluoride / carbon composite material, such as figure 1 shown, including the following steps:

[0023] S1. Put the source compound of iron into a muffle furnace, pass in hydrogen fluoride gas, and react at a temperature of 700~1200°C for 1-5h to obtain iron trifluoride crystals;

[0024] S2, mixing the ferric trifluoride crystal and the carbon material according to the mass ratio of 1:1 to 9:1 and then putting them into a high-energy ball mill, and ball milling for 1 to 24 hours to obtain the ferric trifluoride / carbon composite material;

[0025] In step S1 of the above-mentioned method for preparing ferric trifluoride / carbon composite material, the source compound of iron is mainly one or more of ferric chloride, ferric oxide, ferric carbonate and ferric acetate.

[0026] In the step S1 of the preparation method of the above iron trifluoride / carbon composite material, the carbon material is selected from a carbon materi...

Embodiment 1

[0043] (1) Put ferric chloride into a muffle furnace, pass in hydrogen fluoride gas, and react at a temperature of 700°C for 5 hours to obtain ferric trifluoride crystals;

[0044] (2) The specific surface area of ​​9g ferric trifluoride and 1g is 100m 2 / g of carbon nanotube materials were mixed into a high-energy ball mill and ball milled for 1 h to obtain a ferric trifluoride / carbon nanotube material with a mass fraction of 90% ferric chloride.

Embodiment 2

[0046] (1) Put iron oxide into a muffle furnace, pass in hydrogen fluoride gas, and react at a temperature of 1200°C for 1 hour to obtain iron trifluoride crystals;

[0047] (2) The specific surface area of ​​5g ferric trifluoride and 5g is 700m 2 / g of carbon nanotube material was mixed into a high-energy ball mill and ball milled for 24 hours to obtain a ferric trifluoride / carbon nanotube material with a mass fraction of 50% ferric chloride.

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Abstract

The invention belongs to the field of electrochemical materials, and discloses a ferric (III) fluoride / carbon composite material and its preparation method and application; the composite material includes 50-90wt% of ferric (III) fluoride and 10-50wt% of a carbon material. By compounding of the high conductivity carbon material with a high conductivity, the problem of low conductivity of a ferric trichloride material can be well solved, and the capacity also is improved.

Description

technical field [0001] The invention relates to the field of electrochemical materials, in particular to a ferric trifluoride / carbon composite material and a preparation method and application thereof. Background technique [0002] With the development of various new energy sources, the miniaturization of portable electronic devices and the extensive demand for large-capacity and high-power chemical power sources for electric vehicles. At present, most commercial lithium-ion batteries use inorganic cathode / graphite systems, and these cathode materials are mainly lithium iron phosphate, lithium manganese oxide, lithium cobalt oxide, lithium nickel oxide and mixed systems. Although this type of system has excellent electrochemical performance, it has many disadvantages such as low capacity (such as the theoretical 170mAh / g of lithium iron phosphate), complex preparation process, and high cost. Therefore, the development of new and other types of cathode materials has received...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/58H01M4/62H01M10/0525
CPCY02E60/122H01M4/136H01M4/582H01M4/625H01M10/0525Y02E60/10
Inventor 周明杰钟玲珑王要兵
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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