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What is graphite powder?

2019-07-24 10:33

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Graphite powder is used as a conductive material. Graphite powder can be used in various battery production. What are the advantages and effects of graphite powder in batteries? Graphite powder has the advantages of good electrical conductivity, high temperature resistance and good chemical stability. It utilizes the excellent high electrical conductivity of graphite powder. Graphite powder can produce various battery materials and exert the conductive effect of graphite powder.

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Graphite powder In the production of batteries, the selected graphite powder must be high in carbon content and highly conductive. Graphite powder is used in battery production. It has the advantages of good charge and discharge performance, short charging speed and long storage time. Graphite powder can be used as a battery anode material.The selection of graphite powder is an important step. It is necessary to select high-purity graphite powder with high purity of graphite powder. The higher the purity of graphite powder, the better the conductivity of graphite powder, so that the advantages and effects of graphite powder in the battery can be exerted.

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Graphite powder can be made into various conductive materials for the production of batteries, fuel cells, lithium ion batteries, dry batteries, etc. Graphite powder can fully exert its conductive effect in various battery production, and the graphite powder for battery is uniform in particle size and conductivity. Good and stable chemical properties make high-conductivity graphite powder suitable for use in various battery production.

 

Graphite powder is soft, black and gray; it has a greasy feel and can contaminate paper. The hardness is 1-2, and the hardness can be increased to 3 to 5 along with the increase of impurities in the vertical direction. The specific gravity is 1.9 to 2.3. Under the condition of insulating oxygen, its melting point is above 3000 °C, which is one of the most temperature-resistant minerals.

At normal temperature, the chemical properties of graphite powder are relatively stable, insoluble in water, dilute acid, dilute alkali and organic solvent; react with oxygen at different high temperatures to form carbon dioxide or carbon monoxide; in halogen, only fluorine can directly react with elemental carbon; under heating Graphite powder is more easily oxidized by acid; at high temperature, it can react with many metals to form metal carbides, which can smelt metals at high temperatures.


Graphite powder will be used by many industries because of its many characteristics. What are the characteristics of graphite powder?


1. High temperature resistance

Graphite does not melt and sublimates at 3900K. It is stable in 750K air. The graphite powder has a melting point of 3850±50° C. and a boiling point of 4250° C. Even if it is burned by an ultra-high temperature arc, the weight loss is small and the coefficient of thermal expansion is small. The strength of graphite is enhanced with increasing temperature, and the strength of graphite is doubled at 2000 °C.


2. Good electrical and thermal conductivity

The conductivity of graphite powder is one hundred times higher than that of general non-metallic minerals. Thermal conductivity exceeds metal materials such as steel, iron, and lead. The thermal conductivity decreases with increasing temperature, and even at very high temperatures, graphite becomes a thermal insulator.


3. Prominent lubricity

The lubricating properties of graphite powder depend on the size of the graphite scales. The larger the scales, the smaller the friction coefficient and the better the lubrication performance.


4. Good chemical stability of graphite powder

Graphite powder has good chemical stability at normal temperature, and is resistant to acid, hydrazine and organic solvent.


5. Excellent plasticity and Fast machining speed

Graphite has good toughness and can be made into thin sheets.Fast machining speed,Graphite has good machinability and can be used to form complex, high-precision parts.


6.  High quality thermal shock resistance

Graphite powder can withstand severe changes in temperature without damage when used at room temperature. When the temperature is abrupt, the volume of graphite does not change much and cracks are not generated.


7.  High quality thermal shock resistance

1.6-1.9g/cm3 is equivalent to 1/4 of iron or 1/5 of copper. Can be used for large electrodes.

 

8. Low electrode consumption

1/3-1/5 of copper depending on electrical conditions