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Carbon fluoride and application thereof

A technology of fluorinated carbon and carbon fluoride, which is applied in the field of materials, can solve problems such as low conductivity that have not been effectively solved, and achieve the effect of safe and controllable reaction, high working voltage platform, and high specific capacity

Active Publication Date: 2012-10-17
NORTHWEST INST OF NUCLEAR TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The electrochemical performance of lithium-fluorinated graphite battery has been beneficially improved, but the problems of high polarizability and low conductivity of the battery have not been effectively solved

Method used

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  • Carbon fluoride and application thereof
  • Carbon fluoride and application thereof
  • Carbon fluoride and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Bamboo charcoal is crushed and washed with water, then the washed bamboo charcoal is dried, passed through a 200 mesh sieve, and the undersize is taken for subsequent use; 5.2g of the undersize is packed into an airtight container (the material of the airtight container is pure nickel or Monel alloy), and the Introduce NF in a closed container 3 gas and keep NF 3The pressure is 200KPa, heat the airtight container and keep the reaction temperature at 600°C, react for 1h; take out the product after natural cooling, vacuum treatment at 300°C for 4h to remove by-products in the fluorinated carbon, and obtain 11.4g of the fluorinated carbon product. The rate is 86%.

[0030] The carbon fluoride prepared in this example is analyzed by X-ray energy dispersive spectrometer (EDS), and the atomic ratio of fluorine to carbon is 1:1; in the infrared spectrogram ( figure 1 ), corresponding to the 1219cm of the C-F covalent bond -1 There is a strong absorption peak at ; by X-ray d...

Embodiment 2

[0032] Bamboo charcoal is crushed and washed with water, then the washed bamboo charcoal is dried, passed through a 200-mesh sieve, and the undersize is taken for subsequent use; 4.5g of the undersize is packed into an airtight container (the material of the airtight container is pure nickel or Monel alloy), and the Introduce NF in a closed container 3 gas and keep NF 3 The pressure is 500KPa, heat the airtight container and keep the reaction temperature at 450°C, react for 17h; take out the product after natural cooling, vacuum treatment at 200°C for 6h to remove the by-products in the fluorinated carbon, and obtain 10.3g of the fluorinated carbon product. The rate is 95%.

[0033] The carbon fluoride prepared in this example is analyzed by X-ray energy dispersive spectrometer (EDS), and the atomic ratio of fluorine to carbon is 0.90:1; analyzed by infrared spectrum, it corresponds to the 1219cm of C-F covalent bond -1 There is a strong absorption peak; after X-ray diffract...

Embodiment 3

[0035] Bamboo charcoal is crushed and washed with water, then the washed bamboo charcoal is dried, passed through a 200 mesh sieve, and the undersize is taken for subsequent use; 3.0g of the undersize is packed into an airtight container (the material of the heated part of the airtight container is pure nickel or Monel alloy , the rest of the parts are made of stainless steel), and the NF is passed into the airtight container 3 gas and keep NF 3 The pressure is 20KPa, heat the airtight container and keep the reaction temperature at 350°C, react for 20h; take out the product after natural cooling, vacuum treatment at 200°C for 6h to remove the by-products in the fluorinated carbon, and obtain 4.8g of the fluorinated carbon product. The rate is 88%.

[0036] The carbon fluoride prepared in this example is analyzed by X-ray energy scatter spectrometer (EDS), and the atomic ratio of fluorine to carbon is 0.2:1; analyzed by infrared spectrum, it corresponds to the 1219cm of C-F co...

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Abstract

The invention discloses carbon fluoride prepared by carrying out heating reaction of bamboo charcoal and a fluorination reagent in a closed container. A preparation method of carbon fluoride is characterized by heating bamboo charcoal and the fluorination reagent in the closed container for 1-20 h to obtain carbon fluoride, wherein the fluorination reagent is NF3, and the reaction temperature of the heating reaction is 300-600 DEG C. In addition, the invention further discloses an application of the carbon fluoride in being used as a lithium primary cell cathode material. The preparation method of the carbon fluoride has the advantages of simple process, high specific capacity and good safety. A lithium primary cell prepared by using the carbon fluoride provided by the invention has high working voltage platform, the discharge voltage of lithium-carbon fluoride is raised to 3.0V which is higher than the discharge voltage being 2.5V of lithium-graphite fluoride, thus the energy storage capacity of the lithium primary cell can be raised by about 20%.

Description

technical field [0001] The invention belongs to the technical field of materials, and in particular relates to a carbon fluoride and its application. Background technique [0002] Power storage devices with high specific energy and long storage life are important components for civil and military communications and intelligent high-tech weapons. The specific energy of the current battery can reach 200Wh / kg-400Wh / kg, but the storage life is only 2-3 years. When the battery fails, it must be replaced, which is a huge burden on the management and maintenance of the equipment. And some systems (such as Li-SOCl 2 system, the specific energy is 350Wh / kg~400Wh / kg), there is a risk of explosion, and there is a potential safety hazard of its own. It cannot meet the needs of the development of intelligent high-tech equipment. The lithium-carbon fluoride battery system has high energy density (>500Wh / kg), slow self-discharging electrodes (the service life is more than ten years),...

Claims

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Application Information

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IPC IPC(8): C01B31/00H01M4/583C01B32/10
CPCY02E60/12Y02E60/10
Inventor 刘志超卢嘉春方荃黄萍朱敏华
Owner NORTHWEST INST OF NUCLEAR TECH
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