Zhejiang University has developed a wide range of superconducting graphene fibers.

Graphene has good strength, flexibility, electrical conductivity, thermal conductivity and optical properties. It can be widely used in physics, materials science, electronic information, computer, aerospace and other fields. As a new type of nanomaterial that is currently found to be the thinnest, strongest, and most conductive and thermally conductive, graphene is called "black gold" and is the "king of new materials." Scientists even predict that graphene will "completely change the 21st century." ".

Graphene fiber is a new type of carbon fiber which is arranged by orderly packing of graphene, and has excellent electrical/heat transfer characteristics, so it is highly sought after.

Professor Gao Chao of the Department of Polymer Science and Engineering of Zhejiang University has successively realized high-conductivity and high-modulus graphene fibers and high-conductivity graphene fibers with conductivity comparable to shoulder metals. And recently published research results in the American Chemical Society - Nano.

According to the introduction, on the basis of the preliminary work, the research group prepared the graphene fiber of metal calcium intercalation through the gas phase intercalation reaction, and tested the relationship between its conductivity and temperature. It was found that when the temperature was lowered to 11K, the resistance of the calcium intercalated graphene fiber decreased sharply, showing the properties of the superconductor. When the temperature reached 4K, the electric resistance was zero.

In addition, the intrinsic properties of superconductivity of calcium intercalated graphene fibers were also confirmed by magnetic property characterization. Magnetic calcium intercalated graphene fiber is the first macroscopic carbonaceous superconducting fiber with a superconducting transition temperature of 11K, which is comparable to commercial NbTi superconducting wire, so its commercial prospects are also very promising.

In addition, with the improvement of the preparation process, the superconducting transition zone of calcium intercalated graphene fibers will be further narrowed, and the superconducting transition temperature will be further improved. According to reports, this new type of lightweight superconducting fiber has broad application prospects in low temperature physics, medical magnetic resonance imaging, superconducting quantum interference, future power transmission, aerospace and other fields.

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