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[Chemical Knowledge]：Properties and Uses of Needle Coke

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The properties and uses
of needle coke
Abstract

This article details the properties and uses of needle coke. Needle coke is a special carbon material, because of its unique physical and chemical properties, is widely used in the field of chemical production raw materials. Firstly, the basic properties of needle coke are summarized, including its morphology, structure, physical and chemical properties. Then, the main uses of needle coke are introduced, including the production of graphite electrode, lithium ion battery anode material, super capacitor electrode material and so on. Finally, the production process and development trend of needle coke are discussed.

1. the properties of needle coke

needle coke is a kind of carbon material with special morphology, its appearance is silver gray, metallic luster hard brittle solid. The microstructure of needle coke is composed of aligned fibrous carbon microcrystals, which has a series of excellent physical and chemical properties.

1. physical properties

needle coke density is higher, generally between 2.0-2.2g/cm³. Its thermal expansion coefficient is low, high temperature resistance is excellent, can maintain good dimensional stability at high temperature. In addition, needle coke also has good electrical and thermal conductivity.

2. chemical properties

needle coke chemical stability is better, to acid, alkali, oxidation resistance. At high temperatures, needle coke can react with gases such as oxygen and carbon dioxide. In addition, needle coke also has a certain catalytic activity.

2. needle coke use

needle coke in the field of chemical production of raw materials has a wide range of applications, the following is its main purpose:

1. graphite electrode

needle coke is the main raw material for the production of graphite electrode. Graphite electrode has the advantages of high thermal conductivity, high thermal shock resistance and high corrosion resistance, and is widely used in iron and steel smelting, non-ferrous metal smelting, chemical industry and other fields. The special structure of needle coke makes it possible to make high-density, high-strength graphite electrodes, which improves the service life and performance of the electrodes.

2.
of anode materials for lithium-ion batteries
needle coke is also an important part of anode materials for lithium-ion batteries. Due to its high specific surface area, high conductivity and high chemical stability, needle coke can improve the energy density and cycle life of lithium-ion batteries.

3. Supercapacitor Electrode Material

Needle coke can also be used as an electrode material for supercapacitors. Due to its high specific surface area and good conductivity, needle coke can improve the capacity and power density of supercapacitors.

4. Other uses

In addition to the above several main uses, needle coke can also be used for the production of carbon fiber, high temperature refractory materials. The production process and development trend of

3. needle coke The production process of

needle coke mainly includes raw material selection, carbonization treatment, graphitization treatment and other steps. With the continuous progress of science and technology, the production process of needle coke is also constantly improving, aiming at increasing production, reducing costs, and improving product quality.

the future, with the rapid development of new energy vehicles, smart grid and other fields, the demand for needle coke will further increase. Therefore, strengthening the production technology research and product development of needle coke, improving product quality and reducing costs will help meet market demand and promote the development of chemical production raw materials.

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