Why does graphite paper conduct electricity?
Because graphite contains free-moving charges, the charges move freely after electrification to form current, so it can conduct electricity. The real reason why graphite conducts electricity is that 6 carbon atoms share 6 electrons to form a large ∏66 bond with 6 electrons and 6 centers. In the carbon ring of the same layer of graphite, all 6-membered rings form a ∏-∏ conjugated system. In other words, in the carbon ring of the same layer of graphite, all carbon atoms form a huge big ∏ bond, and all the electrons in this big ∏ bond can flow freely in the layer, which is the reason why graphite paper can conduct electricity.
Graphite is a lamellar structure, and there are free electrons that are not bonded between the layers. After electrification, they can move directionally. Virtually all substances conduct electricity, it’s just a matter of resistivity. The structure of graphite determines that it has the smallest resistivity among carbon elements.
Conductive principle of graphite paper:
Carbon is a tetravalent atom. On the one hand, just like metal atoms, the outermost electrons are easily lost. Carbon has fewer outermost electrons. It is very similar to metals, so it has certain electrical conductivity. , corresponding free electrons and holes will be generated. Coupled with the outer electrons that carbon can easily lose, under the action of the potential difference, there will be movement and fill the holes. Create a flow of electrons. This is the principle of semiconductors.
Post time: Mar-14-2022