Vapor growth graphite fiber composition, its mixture and application

Abstract

The invention relates to a vapor growth graphite fiber composition, its mixture and an application. The VGGF composition comprises a carbon component with content of at least 99.9 weight percentage, the graphitization degree of the carbon component is at least 75%, the carbon component comprises non fibrous carbon and fibrous VGGF, wherein the area ratio of the non fibrous carbon to the fibrous VGGF measured by a scanning electron microscope is less than or equal to 5%. The fibrous VGGF also comprises the graphite fiber in a three-dimensional crosslinked structure, wherein the content of the graphite fiber which is measured by the scanning electron microscope in the three-dimensional crosslinked structure is between 5 area percentages and 50 area percentages in the fibrous VGGF. The VGGF composition and its mixture can be used in the composite materials for increasing the strength, conductive property, heat conduction property and the like of the composite material.

Description

technical field [0001] The present invention relates to a graphite fiber (Graphite Fibers) composition and its mixture, and in particular to a vapor-phase grown graphite fiber (Vapor-Grown Graphite Fibers; VGGF) composition and its mixture. Background technique [0002] In recent years, with the evolution of information, communication, computer, energy and other industries, electronic equipment has developed in the direction of smaller size and higher functionality, so there is a higher demand for the performance of electronic materials. Known technologies often add non-fibrous carbon black to materials such as plastics and rubber to improve the properties of materials such as thermal conductivity, electrical conductivity, and strength. Since the non-fibrous carbon black is granular and thus lacks continuity, it is often necessary to add a large amount to have a slight effect. However, as a result of adding a large amount, the physical properties of the composite material w...

AI Technical Summary

Problems solved by technology

However, the known VGCF contains too much non-fibrous carbon, which reduces the number of continuous networks it can build in the composite, thereby affecting the performance of the composite

Furthermore, because the known VGCF is not highly graphitized, its improvement in the electrical and thermal conductivity of composite materials is not as expected.

In addition, the metal catalyst used in the known VGCF process has not been removed to an appropriate range, so the metal content is too high, so that it will have a negative impact on the electrochemical reaction in the application of energy materials, which will affect the battery power and cycle life. The improvement of

[0005] Therefore, it is necessary to propose a VGGF composition and its mixture, so as to improve the known VGCF that is not highly graphitized and contains too much non-fibrous carbon and metal components, etc. The problem of impurities

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