What is the conductivity of carbon black, what is the conductivity of activated carbon electrodes?

Carbon black. It is a semiconductor material.

Commonly used conductivity.

or his reciprocal resistivity.

indicates his electrical properties. The conductivity of carbon black is closely related to its microstructure, particle size, structure, surface properties, etc.

The microstructure of carbon black gives carbon black its conductivity. The electrical properties of highly oriented pyrolyzed graphite with natural graphite single crystal are similar to semimetallic properties, i.e., the energy band between his valence electrons and conductive electron bands is very low, less than. Moreover, due to the orientation of the graphite layer, there are also obvious anisotropies in terms of electrical properties.

For carbon black aggregates, due to the concentric circle nature of the graphite layer orientation, most of the contact is along the c-axis, and its resistivity is higher than that of graphite.

The physicochemical properties of conductive carbon black are related to its electrical conductivity. In general, the smaller the particles, the better the conductivity, which is due to increasing the number of particles per unit volume of carbon black, thereby increasing the contact point or reducing the ion spacing in the dispersion system, resulting in a decrease in resistance and an increase in conductivity. Fine-particle carbon black has high electrical conductivity.

The structure of conductive carbon black is also an important factor affecting electrical conductivity. The high-structure carbon black also has good conductivity compared to the normal structure or the low-structure carbon black. This is apparently due to the presence of a fibrous structure in the chain branch structure, where the toe links form more conductive pathways.

The volatiles or residual tar-like substances on the surface of carbon black, that is, flux extracts, are films of oxygen-containing compounds or oily hydrocarbon molecules covered on the surface of carbon black, forming an insulating layer, increasing the resistance of carbon black and reducing conductivity. When carbon black is heated out in a vacuum inert atmosphere, the conductivity is obvious, and the conductivity is even greater. Carbon black surface roughness.

That is, porosity also affects the conductivity of carbon black. Carbon black with a rough and hollow surface has an increased conductivity. This is due to the fact that when the amount of filling is constant.

The long and empty particles are smaller than the solid ones. Therefore, carbon black with good conductivity should have fine particles. The structure is high.

The surface is pure. Rough and porous characteristic.

The electrical conductivity of carbon black refers to its own electrical conductivity;

Conventional conductive carbon black and acetylene carbon black have this property, conductive carbon black conductivity acetylene carbon black conductivity.

Other carbon black categories, such as: rubber carbon black, pigment carbon black, semi-reinforcing carbon black, wear-resistant carbon black, spray carbon black, metallurgical carbon black, etc., in the pure carbon black state, it also has a certain conductivity, but after being applied to the product, its conductivity is negligible (basically negligible).

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Carbon black is chained or grape-shaped under SEM, and individual carbon black particles have a very large specific surface area. It has better ionic and electronic conductivity than graphite, and the high specific surface area of carbon black particles and tight packing are conducive to close contact between the particles, forming a conductive network in the electrode, which is conducive to the adsorption of electrolyte and improves the ionic conductivity. In addition, the primary particles of carbon are agglomerated to form a branched chain structure, which can form a chain conductive structure with the active material, which is helpful to improve the electronic conductivity of the material.

The process problem caused by the larger surface is that it is difficult to disperse and has strong oil absorption, which requires improving the dispersion by improving the mixing process of living substances and conductive agents, and controlling the amount of carbon black within a certain range (usually below). In batteries, it can play the role of liquid absorption and liquid retention.

At present, conductive carbon black is still dominated by conventional conductive agent SP. There is a type of conductive carbon black, such as EC-300J, Carbon ECP and ECP-600JD, etc., compared with other conductive carbon blacks used in batteries, Koqin black has a unique branched chain morphology. The advantage of this form is that the conductor has many conductive contact points and more branched chains, so it can achieve extremely high conductivity with only a small amount of addition, and other carbon blacks are mostly spherical or flake-like, so a high amount of addition is required to achieve the required electrical properties.

Activated carbon is electrically conductive, and conductivity is between.

Activated carbon is a specially treated charcoal that heats organic raw materials (husks, coal, wood, etc.) in an airtight condition to reduce non-carbon components (this process is called carbonization), and then reacts with the gas to erode the surface to produce a microporous structure (this process is called activation). Because the activation process is a microscopic process, that is, the surface erosion of a large number of molecular carbides is punctate erosion, resulting in countless fine pores on the surface of activated carbon. The microporous diameter of the surface of activated carbon is mostly between 2 50nm, even a small amount of activated carbon, there is a huge surface area, the surface area of each gram of activated carbon is 500 1500m2, almost all applications of activated carbon are based on this characteristic of activated carbon.

Activated carbon is a general term for carbon materials prepared by pyrolysis and activation of carbon-containing raw materials such as wood, coal and petroleum coke, which have developed pore structure, large specific surface area and rich surface chemical groups, and strong specific adsorption capacity.

It is usually a porous amorphous carbon in powder or granular form with strong adsorption capacity. It is obtained by the carbonaceous substances (such as coal, wood, hard husks, kernels, resins, etc.) under the condition of isolated air by 600 900 high temperature, and then under the condition of 400 900 with air, carbon dioxide, water vapor or a mixture of the three of the three after oxidation activation.

Conductive carbon black is a carbon black with low or high resistance properties. It can give the product a conductive or anti-static effect. It is characterized by small particle size, large and rough specific surface area, high structure, and clean surface (few compounds).

Conductive carbon black is a carbon black with low or high resistance properties. It can give the product a conductive or anti-static effect. It is characterized by small particle size, large and rough specific surface area, high structure, and clean surface (few compounds).

It can be applied to different products, such as conductive rubber, conductive plastic, radio components, etc. The main varieties are acetylene, carbon black, etc., which are used in the battery industry.

Carbon black is the same as carbon black. Carbon black itself is a semiconductor material, conductive carbon black has a low resistivity, can make rubber or plastic have a certain conductive performance, used in different conductive or antistatic products, such as antistatic or conductive rubber, plastic products, cable materials; It can also be used as a raw material for dry batteries.

The conductivity of carbon black usually refers to the powder resistance of carbon black, unit: ·cm, and the constant voltage method is commonly used to test the conductivity of carbon black.

Carbon Black Industry" describes the knowledge, applications, functions, characteristics and latest ** of conductive carbon black, I hope to help you! Thank you!

Activated carbon conductance is between. Activated carbon has the advantages of large specific surface area, developed pores and easy preparation, and has become the earliest carbon electrode material for supercapacitors.

New and high-performance activated carbon electrode materials can be prepared by modifying traditional activated carbon. With polyvinylidene chloride as the precursor, porous carbon with a specific surface area of 1200m2·g-1 and pore capacity was prepared by carbonization treatment without other post-treatment.

Chemical properties

In addition to physical adsorption, there is also chemical adsorption of activated carbon. The adsorption of activated carbon depends on both the pore structure and the chemical composition.

Activated carbon not only contains carbon, but also contains a small amount of oxygen and hydrogen that are chemically bound and functionally activated, such as carbonyl, carboxyl, phenols, lactones, quinones, and ethers. These surfaces contain oxides and complexes, some of which are derived from the derivatives of the raw material, and some of which are formed by the action of air or water vapor during and after activation.

Surface sulfides and chlorides are also sometimes formed. In the activation process, the minerals contained in the raw materials are concentrated in the activated carbon to become ash, and the main components of the ash are alkali metals and alkaline earth metal salts, such as carbonates and phosphates.

Summary. The conductivity of carbon black refers to its own conductivity, and the conductivity of carbon black is given and determined by the microstructure of carbon black, so the conductivity of carbon black is also directly related to the structure of carbon black. The following methods are to detect the conductivity, and judge the conductivity of the carbon black by the specific surface area of the carbon black

The larger the specific surface area, the better the conductivity of carbon black; The conductivity of carbon black is judged by the structure of carbon black: the higher the structure, the better the conductivity of carbon black; The conductivity of carbon black is judged by the purity of carbon black: the higher the oil absorption value, the better the conductivity of carbon black; The conductivity of carbon black is judged by the purity of carbon black

The higher the purity of carbon black, the better its conductivity.

The conductivity of carbon black refers to its own conductive performance, and the conductivity of carbon black is given and determined by the microstructure of carbon black, so the conductivity of carbon black is also related to the structure of carbon black. The following methods are to detect the conductivity, and judge the conductivity of carbon black by the specific surface area of carbon black: the larger the specific surface area, the better the conductivity of carbon black; The conductivity of carbon black is judged by the structure of carbon black

The higher the structure, the better the conductivity of carbon black; The conductivity of carbon black is judged by the purity of carbon black: the higher the oil absorption value, the better the conductivity of carbon black; The conductivity of carbon black is judged by the purity of carbon black: the higher the purity, the better the conductivity of carbon black.

There are several methods for conducting conductivity testing: one is the powder method, which contacts two electrodes into two sections of the wire, and then applies a voltage, and uses Ohm's law to obtain conductivity through the relationship between voltage and current; One is the four-probe method, in which the sample is pressed into a piece and its conductivity is tested by the four-probe principle.

As for if you want to test, you can find a third-party testing agency for carbon black testing.

After all, individuals don't have all the tools, and the measurements are not accurate.

May I ask if we boil the spine section with pure water for 6 minutes and bury it in the wild, weigh 10g of samples at a temperature of 600, and measure 100ml of pure water Mingyu is cold to below 25 degrees and then test with a conductivity instrument, is this method correct?

Hello, the test method should be like this, take an appropriate amount of sample and put it in a beaker, according to the provisions of GB, put it in a constant temperature drying oven of 105 2 to dry for 1h, and move it into a dryer to cool it for later use. Weigh 1g of the dried specimen to an accuracy of . Place in a clean and dry 150ml beaker and slowly add 50ml of dibutyl phthalate.

Turn on the power supply of TBY-30 carbon black resistivity tester and preheat it for 30min. After the sample is fully soaked, put it into the stirrer adjusted in advance according to the instrument manual, and put the stirring paddle into the center of the beaker, from the bottom.

This is a standard procedure.

Your approach may be incorrect.

However, if the reagents and tools around you are not sufficient, you can only do a rough test.

Summary. The carbon black content is expressed as a percentage by mass by the following formula: (m2-m3) m1 x 100, where m1 = mass in grams, test part |m2 = mass, in grams, is 500 samples added to the test part after pyrolysism3 = mass, in grams, is 900 samples after calcination with appropriate ash.

The analysis must be carried out in three parts and the arithmetic mean must be obtained.

The soot yield is expressed as a percentage of the original mass and the formula is as follows: (m3-m) m1*100, where m=mass, in grams, sample ship|The formulas for m1 and m3 are as above.

How much carbon black is contained in a hundred kilograms of conductive electricity.

Hello, I am helping you to inquire about the relevant information and will reply to you immediately.

The carbon black content is expressed as a percentage of mass roll mass by the following formula: (m2-m3) m1 x 100, where m1 = mass in grams, test part |m2 = mass, in grams, is 500 samples added to the test part after pyrolysism3 = mass field accompaniment, in grams, is 900 samples after calcination, with appropriate ash. |The analysis must be carried out in three parts and the arithmetic mean must be obtained.

The soot yield is expressed as a percentage of the original mass and the formula is as follows: (m3-m) m1*100, where m = mass, the unit of song is gram, sample ship|The formulas for m1 and m3 are as above.