Time：2023.06.19Browse：1
Natural flake graphite is a non-metallic mineral with unique physical and chemical properties such as high temperature resistance, oxidation resistance, corrosion resistance, thermal shock resistance, high strength, good toughness, high self-lubricating strength, strong thermal conductivity and conductivity. The graphite series products are mainly used in industries such as metallurgy, machinery, electronics, batteries, chemicals, light industry, military industry, national defense, aerospace, refractory materials, etc. It is an essential non-metallic raw material for today's high-tech industry.
The conductivity of graphite is 100 times higher than that of general non-metallic minerals, and it is a widely used conductive and anti-static material in industry and daily life. What are the main applications of flake graphite?
1. Used in plastic or rubber, it can be made into different conductive rubber and plastic products. This product has been widely used in anti-static additives, computer electromagnetic screens, etc. In addition, it has broad application prospects in fields such as micro TV screens, mobile phones, solar cells, and light-emitting diodes.
2. Used in resins and coatings, it can be compounded with conductive polymers to produce composite materials with excellent conductivity. Conductive graphite coatings play an irreplaceable role in home anti-static and hospital building electromagnetic radiation protection due to their excellent conductivity, affordable price, and simple operation.
3. Using conductive graphite powder in ink can make the surface of printed materials conductive and anti-static.
When used in conductive fibers and cloth, this product can shield electromagnetic waves. Many of the radiation protection suits we see in our daily lives utilize this principle.
As a key material for lithium-ion batteries, graphite negative electrode materials have gradually become the mainstream in the negative electrode material market, accounting for approximately 70% of the market share. Since the development of lithium-ion batteries, a variety of cathode material systems have been derived, such as lithium cobalate, Iron(II) phosphate lithium, nickel cobalt lithium manganate, nickel cobalt lithium aluminate, etc. But the graphite negative electrode material system has been used until now.
Graphite anode materials are usually divided into natural graphite and artificial graphite. Natural graphite comes from mines and is extracted from places such as Heilongjiang and Qingdao. It is made by flotation, spheroidization, and surface coating. Artificial graphite is derived from coal and petrochemical by-products. It is made from Coal tar pitch or vacuum residue, a by-product of petroleum or coal chemical industry, by delayed coking to needle coke, then granulation and graphitization.
Natural graphite can be divided into flake graphite and earthy graphite. The anode material is usually flake graphite, which has advantages such as large reserves, low cost, low potential, and stable curve. In a suitable electrolyte, its first cycle Coulombic efficiency is 90%~93%, and its reversible capacity can reach 340~370 mAh g-1. It is one of the mainstream negative electrode materials for lithium-ion batteries.
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