China’s UHV power transmission ranks among the top in the world. This is a well-known fact. Will the discovery of normal-temperature superconductivity of graphene by a boy with extraordinary talent lead to a huge investment gap in UHV power transmission in China? Graphene is a two-dimensional carbon nanomaterial composed of carbon atoms in a honeycomb lattice. It has excellent optical, Mechanical and electrical properties, in high-strength materials, superconductors will have extremely wide applications in the future. Although it has excellent properties, so far, due to the production process, as well as practical applications and industrial development are full of uncertainty. After all, with the proliferation of room-temperature superconducting materials, all electrified lines have no resistance, so the increased loss voltage is useless.
Graphene superconductivity is the ability to use graphene’s zero resistance to conduct electricity under certain conditions. We know that during the transmission process, some electrical energy will be consumed unknowingly, and the important factor causing this consumption is resistance. The greater the resistance, the more power is lost; conversely, the smaller the resistance, the less power is lost. But in superconductor transmission experiments, the resistance can reach almost 0! Because of this, in order to improve the utilization rate of electric energy as much as possible, the research of superconductors has received great attention from countries around the world. Among superconductors, graphene is an ideal new material.
Graphene itself is a two-dimensional material composed of a layer of carbon atoms, which is a hexagonal shape of carbon atoms. This structure is highly consistent with the Dirac cone band structure required for superconductors, making graphene a necessary condition for becoming a superconductor. Unfortunately, graphene itself is not superconducting. If you want to use it to study superconductivity, there are two ways. One is to twist and stack two layers of graphene using "stack pulling" technology, and the other is doping used in nature. As early as March 5, 2018, Cao Yuan, a genius from China, demonstrated to nature the feasibility of superimposed twisting of double-layer graphene. In the experiment, Cao added two layers of graphene and twisted them by 1.1°, creating the magical angle. This magical angle allows graphene to reach an excellent zero-resistance state, making it superconducting, but there are many environmental limitations to the superconductivity achieved by this method. The low temperature of 1.7K is one of the trickiest requirements. The 1.7 k here is different from the 1.7°C we usually say.
In the absolute temperature scale, the unit of measurement is K, and absolute zero K is equal to -273.15?C! On this basis, we can calculate that the 1.7 K conversion is -271.4℃, and we know the lowest temperature in Antarctica It's only -80.6°C, so it's impossible to reach the "magic angle" temperature of the experiment in natural conditions, so it's impossible to use graphene for superconducting power transmission.