Ultrastrong Graphene-Copper Core-Shell Wires for High-Performance Electrical Cables

Title
Ultrastrong Graphene-Copper Core-Shell Wires for High-Performance Electrical Cables
Authors
박민김태욱이동수이상현문병준배수강이승기김상진노호균신동헌최용석김영수김근수홍병희
Keywords
graphene fibers; copper; electroplating; tensile strength; ampacity
Issue Date
2018-03
Publisher
ACS Nano
Citation
VOL 12, NO 3-2808
Abstract
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.
URI
http://pubs.kist.re.kr/handle/201004/67556
ISSN
1936-0851
Appears in Collections:
KIST Publication > Article
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