| About this Abstract |
| Meeting |
MS&T22: Materials Science & Technology
|
| Symposium
|
Controlled Synthesis, Processing, and Applications of Structural and Functional Nanomaterials
|
| Presentation Title |
An Axially Continuous Graphene-Copper Wire for Multifunctional Applications |
| Author(s) |
Wonmo Kang, Hamzeh Kashani , Chunghwan Kim, Christopher Rudolf, Keith Perkins |
| On-Site Speaker (Planned) |
Wonmo Kang |
| Abstract Scope |
With the increasing use of modern electric power systems in uniquely challenging situations, excellent electrical properties of conductors with environmental stability are becoming increasingly relevant. In this presentation, we demonstrate significantly enhanced electrical properties (i.e., a 450-% increase in the current density breakdown limit) and superb thermal stability compared to pure copper by synthesizing axially continuous-graphene layers on microscale-diameter copper wires. Our experiments combined with theoretical analysis reveal that the continuous graphene layers on a fine copper wire considerably improve (1) surface heat dissipation (224% increase), (2) electrical conductivity (41% increase), and (3) thermal stability (41.2% lower resistivity after thermal cycles up to 450oC) compared to pure copper wires. Our promising results and fundamental understanding of the underlying mechanisms may bring technical paradigm shift in designing high-performance, axially bi-continuous graphene-metal composites for high power transmission applications in aerospace, advanced electronics, electric vehicles, and power transportation systems. |