Ultrastrong Graphene-Copper Core-Shell Wires for High-Performance Electrical Cables
- Ultrastrong Graphene-Copper Core-Shell Wires for High-Performance Electrical Cables
- 박민; 김태욱; 이동수; 이상현; 문병준; 배수강; 이승기; 김상진; 노호균; 신동헌; 최용석; 김영수; 김근수; 홍병희
- graphene fibers; copper; electroplating; tensile strength; ampacity
- Issue Date
- ACS Nano
- VOL 12, NO 3-2808
- Recent development in mobile electronic devices and electric vehicles requires electrical wires with reduced weight as well as enhanced stability. In addition, since electric energy is mostly generated from power plants located far from its consuming places, mechanically stronger and higher electric power transmission cables are strongly demanded. However, there has been no alternative materials that can practically replace copper materials. Here, we report a method to prepare ultrastrong graphene fibers (GFs)– Cu core– shell wires with significantly enhanced electrical and mechanical properties. The core GFs are synthesized by chemical vapor deposition, followed by electroplating of Cu shells, where the large surface area of GFs in contact with Cu maximizes the mechanical toughness of the core– shell wires. At the same time, the unique electrical and thermal characteristics of graphene allow a ∼10 times higher current density limit, providing more efficient and reliable delivery of electrical energies through the GFs– Cu wires. We believe that our results would be useful to overcome the current limit in electrical wires and cables for lightweight, energy-saving, and high-power applications.
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