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Carbon fluoride and preparation method and application thereof

A carbon fluoride, the technology of carbon fluoride, which is applied in electrical components, battery electrodes, non-aqueous electrolyte batteries, etc., can solve the problems of limited industrialization development, poor storage performance, unstable carbon fluoride material structure, etc. Large market application prospect, simple preparation method effect

Inactive Publication Date: 2017-07-11
厦门中科希弗科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The study found that partially fluorinated and semi-ionized fluorinated carbon materials have high voltage and high power characteristics 0.3~0.5V higher than fluorinated graphite. This research can be traced back to 1989 when the French scientist Professor Hamwi passed the 2 +HF+IF 5 The fluorination of graphite in a mixed system has prepared a carbon fluoride material with high voltage characteristics at room temperature, but because this process is prepared at room temperature, the structure of the prepared carbon fluoride material is unstable and the storage performance is poor. Poor, thereby limiting its industrialization development, so there is an urgent need to develop a promising industrialization of carbon fluoride with high voltage characteristics and stable structure and its preparation process

Method used

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  • Carbon fluoride and preparation method and application thereof

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Experimental program
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Effect test

Embodiment 1

[0022] (1) Put 10g of carbon powder into the fluorination equipment, the C content is 80%, the N content is 8%, the H content is 5%, and the O content is 7%;

[0023] (2) The fluorination equipment was evacuated to make the vacuum degree reach -0.01 MPa, the fluorinated gas nitrogen trifluoride was introduced, the pressure was maintained at 200 kPa, and the reaction was carried out at 450 °C for 12 h to obtain 13.9 g of carbon fluoride. , in which the C content is 57.6 %, the F content is 42.4 %, and the discharge voltage plateau is 3.1 V (vs. Li + / Li).

Embodiment 2

[0025] (1) Put 10g of carbon powder into the fluorination equipment, the C content is 85%, the N content is 8%, the H content is 4%, and the O content is 3%;

[0026] (2) The fluorination equipment was evacuated to make the vacuum degree reach -0.01 MPa, the fluorinated gas nitrogen trifluoride was introduced, the pressure was kept at 300 kPa, and the reaction was carried out at 550 °C for 16 h to obtain 17.4 g of carbon fluoride. , in which the C content is 48.8%, the F content is 51.2%, and the discharge voltage plateau is 3.0 V (vs. Li + / Li).

Embodiment 3

[0028] (1) Put 10g of carbon powder into the fluorination equipment, the C content is 94%, the N content is 4%, and the H content is 2%;

[0029] (2) The fluorination equipment was evacuated to make the vacuum degree reach -0.01 MPa, the fluorinated gas nitrogen trifluoride was introduced, the pressure was maintained at 400 kPa, and the reaction was carried out at 600 °C for 16 h to obtain 21.3 g of carbon fluoride. , in which the C content is 44.1%, the F content is 55.9%, and the discharge voltage plateau is 3.0 V (vs. Li + / Li).

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Abstract

The invention discloses carbon fluoride and a preparation method and application thereof. The carbon fluoride is made by fluorinating carbon powder through a chemical reaction method. The carbon powder comprises elements, by mass percentage, 80-95% of C, 0-20% of N, 0-5% of H and 0-10% of O. The preparation method includes: (1) putting carbon powder in a fluorination apparatus; and (2) vacuuming the fluorination apparatus, leading a fluorine source in, and performing a reaction at 400-700 DEG under the pressure of 100-500 kPa for 6-24h to obtain carbon fluoride. According to the method, carbon powder and a fluorine source with different contents react in a certain condition to prepare carbon fluoride. The preparation method is simple, and carbon fluoride with high voltage characteristic and stable structure can be obtained. When carbon fluoride is taken as a negative electrode material of a lithium battery, the discharge voltage platform of carbon fluoride is higher than that of commercial fluoridized graphite in the prior art, so that the carbon fluoride has bright market application prospects.

Description

technical field [0001] The invention relates to the technical field of new materials, in particular to a carbon fluoride, a preparation method thereof, and applications in lithium battery cathode materials and supercapacitors. Background technique [0002] Driven by social development needs and potential market demands, new chemical power systems based on new concepts, new materials and new technologies are emerging. As we all know, a battery is a device that converts the chemical energy stored in the active material directly into electrical energy through the transfer of electrons through electrochemical redox reactions. The output voltage and energy density of a battery mainly depend on the reactive materials of the positive and negative electrodes, and the electronegativity of the reactive materials of the electrodes is the most important factor affecting the performance of the battery. [0003] Fluorine is a very unique element, located at the upper right of the periodi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/583H01M10/052H01G11/32
CPCH01G11/32H01M4/5835H01M10/052Y02E60/10
Inventor 岳红军叶荣森
Owner 厦门中科希弗科技有限公司
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