Graphite as an electrode mainly utilizes the conductivity and stability of graphite. Graphite is a mixed crystal with a special structure. It not only has the characteristics of atomic crystals but also has the characteristics of molecular crystals and metal crystals.
In the layered structure of graphite, there are covalent bonds between atoms, the bond energy is very large, the melting point is high, and the properties are stable. There are delocalized large π bonds in the layered structure, which has good electrical conductivity.
Therefore, when graphite is used as an electrode, its electrical conductivity, high melting point, and thermal stability are utilized. Furthermore, graphite is used as an electrode to take advantage of its physical properties rather than its chemical properties.
Conductive properties of graphite:
Graphite rods are used as dry battery electrodes to utilize the conductivity of graphite, that is, the conductivity that can be shown without chemical changes.
Graphite conducts electricity because each carbon atom in graphite forms only 3 covalent bonds with other carbon atoms, and each carbon atom still retains 1 free electron to transport charge.
The conductivity of graphite is one hundred times higher than that of ordinary non-metallic minerals, and its thermal conductivity exceeds that of metal materials such as steel, iron, and lead.
The thermal conductivity of graphite electrodes decreases with increasing temperature, and graphite can even act as a thermal insulator at extremely high temperatures.
What is a graphene battery?
What is a graphene battery and what are the advantages of a graphene battery? 1. Graphene battery is a honeycomb planar film formed by the sp2 hybridization of carbon atoms. It is a quasi-two-dimensional material with a thickness of only one atomic layer, also known as monoatomic layer graphite.
What is a graphite electrode material?
Graphite electrode knowledge, what is graphite electrode material, its main raw materials are petroleum tar, needle coke, and coal tar pitch. Compared with copper, graphite material has the advantages of less consumption, fast discharge speed, lightweight and small volume. Thermal expansion coefficient. It is becoming the material of choice for mold making.