Expandable Graphite
Size
0.50mm or 0.106mm, etc
Package
25 kg small bags into ton bags
Origin
China
Features
Preservative/Electrical and thermal conductivity, etc.
Application
Fireproof sealing element, flame retardant, refractory brick, etc.
Expandable graphite crystal is a typical layered carbon material. Other heterogeneous particles such as atoms, molecules, ions, and even atomic clusters are inserted into the interlayer of crystalline graphite by physical or chemical methods to form a new layered compound, which is called graphite interlayer compound, namely expandable graphite.
Request a quoteExpandable graphite is widely used, one of which is used in batteries, about the application of expandable graphite in the battery, as a battery material, expandable graphite is transformed into electric energy by the change of free energy of interlayer reaction of expandable graphite. Usually, expandable graphite is used as cathode, lithium as anode, or expandable graphite composite silver oxide as cathode and zinc as an anode. Graphite fluoride, graphite acid, and expandable graphite of metal halides such as aucl3 and TiF4 have been applied to batteries. we take you to understand in detail.
1. Application in mercury-free high-energy battery
Expandable graphite can be used in mercury-free high-energy battery alkaline silver oxide high-energy battery. The cathode material of this battery is ago or Ag2O, but both ago and Ag2O are weakly conductive substances. When using it as a cathode, an appropriate amount of conductive medium must be added to make the cathode have appropriate conductive characteristics. At present, it is widely used to add 5% – 15% earthy graphite into silver oxide cathode material as a conductive medium. If expandable graphite is used, compared with earthy graphite, the amount is less, the conductivity is strong, the battery has higher pulse characteristics, and the voltage can be increased by 15% – 30%. The fundamental reason is that the inline bond in the layered structure of silver oxide cathode material containing expandable graphite makes the graphite particles interconnected and spread all over the cathode, The silver oxide grade containing earthy graphite has no such layered structure.
2. Application in ordinary zinc manganese battery (dry battery)
At present, most of the cells of ordinary zinc manganese batteries are acetylene black used in Germany and the United States in this century. It has many production processes, strict requirements, high prices, and unsatisfactory conductivity. Using high-purity expandable graphite instead of acetylene black as the electrode, its open-circuit voltage, short-circuit current and load voltage are higher than those produced by acetylene black, At the same time, it also improves the production conditions and reduces the production cost.
In addition, there are many other applications of expandable graphite, such as sealing materials, environmental protection, medicine, and fire retardants, such as fireproof board and fireproof bags, as well as many applications on coatings, which is also the reason why expandable graphite has become more and more popular in recent years.
