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Method for one-step preparation of high-specific-energy carbon fluoride from phenolic resin precursor

A phenolic resin and precursor technology, applied in the direction of carbon fluoride, electrical components, battery electrodes, etc., to achieve simple and effective operation, meet the needs of high specific energy, and achieve the effect of high specific energy

Inactive Publication Date: 2020-01-31
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This is due to sp 3 The fluorine-carbon bonds in the fluorinated graphite in the hybrid configuration show covalency, and only ~55% of its chemical energy can be used, and the remaining energy is released in the form of heat energy, resulting in a large amount of heat energy release.

Method used

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  • Method for one-step preparation of high-specific-energy carbon fluoride from phenolic resin precursor
  • Method for one-step preparation of high-specific-energy carbon fluoride from phenolic resin precursor
  • Method for one-step preparation of high-specific-energy carbon fluoride from phenolic resin precursor

Examples

Experimental program
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Effect test

example 1

[0017] (1) Put 0.6g of phenolic resin into a vacuum drying oven at 80°C and bake for 8 hours to ensure that there is no moisture at all;

[0018] (2) Put 0.52g of the phenolic resin in the step (1) in the reactor to vacuum (gauge pressure-0.1MPa), heat the reactor to 300°C, keep it for 30min, then vacuum again, and feed 10% by volume The mixed gas of fluorine and nitrogen is brought to 0MPa (gauge pressure), and reacted for 6h to obtain carbon fluoride.

example 2

[0020] (1) Put 0.4g of phenolic resin into a vacuum drying oven at 150°C for 2 hours to ensure that there is no moisture at all;

[0021] (2) Put 0.35g of the phenolic resin in the step (1) in the reactor to vacuum (gauge pressure-0.2MPa), heat the reactor to 250°C, keep it for 20min, then vacuumize, and feed 20% by volume The mixed gas of fluorine and nitrogen to 0MPa (gauge pressure), react for 1h, to obtain carbon fluoride.

example 3

[0023] (1) Put 0.5g of phenolic resin into a vacuum drying oven at 100°C for 3 hours to ensure that there is no moisture at all;

[0024] (2) Put 0.42g of the phenolic resin in step (1) in the reactor and pump it to vacuum (gauge pressure -0.1MPa), heat the reactor to 200°C, keep it for 30min, then vacuumize it, and feed it with a volume percentage of 30% The mixed gas of fluorine and nitrogen is brought to 0MPa (gauge pressure), and reacted for 8h to obtain carbon fluoride.

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Abstract

The invention discloses a method for one-step preparation of high-specific-energy carbon fluoride by a phenolic resin precursor, wherein the method comprises the steps: putting completely dried phenolic resin into a reaction kettle, vacuumizing, heating, introducing mixed gas of fluorine gas and nitrogen gas, carrying out a reaction, and thus obtaining the carbon fluoride. The prepared carbon fluoride is used as a positive electrode material and is mixed with carbon black and a binder, a button lithium battery is assembled, an electrochemical performance test is carried out, and relatively good performance is shown. The prepared carbon fluoride material has a partial sp2 hybrid structure, and the discharge voltage and the specific energy of the carbon fluoride material are higher than those of a commercial graphite fluoride material; the carbon fluoride material with the yield reaching several grams or even hundreds of grams is provided by the technical scheme of the invention so as tomeet the requirement on high specific energy of a lithium primary battery.

Description

technical field [0001] The invention relates to the technical field of fluorinated carbon materials used in lithium primary batteries, in particular to a method for preparing high specific energy fluorinated carbons through a one-step method of a phenolic resin precursor. Background technique [0002] The fluorination of carbon materials is a process of breaking the carbon layer π bonds and combining with carbon atoms to form C-F bonds, which can significantly improve the surface polarity, electrical conductivity, adsorption capacity and capacitive properties of carbon materials. Fluorinated carbon materials have become one of the research hotspots of new high-tech, high-performance, and high-efficiency new carbon-based materials in the world due to their unique physical and chemical properties. In particular, carbon fluoride has important application prospects in the field of high-energy lithium primary battery cathodes. Compared with other lithium primary batteries, lithi...

Claims

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Application Information

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IPC IPC(8): C01B32/10H01M4/58
CPCC01P2002/85C01P2004/03C01P2006/40C01B32/10H01M4/582Y02E60/10
Inventor 冯奕钰彭聪封伟李瑀
Owner TIANJIN UNIV