| About this Abstract |
| Meeting |
MS&T23: Materials Science & Technology
|
| Symposium
|
Controlled Synthesis, Processing, and Applications of Structural and Functional Nanomaterials
|
| Presentation Title |
Graphene-metal Composites as High-temperature Electrical Conductors |
| Author(s) |
Hamzeh Kashani, Won June Choi, Chunghwan Kim, Wonmo Kang |
| On-Site Speaker (Planned) |
Wonmo Kang |
| Abstract Scope |
The ability of current advanced electrical conductors for high-temperature operations remains limited to well below 400 oC mainly due to poor oxidation resistance and microstructural instability of copper. In this talk, we present a highly conductive and thermally stable Nickel-Graphene-Copper (NiGCu) composite wire that combines the advantages of graphene and its metallic components. The NiGCu wire consists of a conductive copper core, an oxidation resistant nickel shell, and an axially continuous graphene embedded between them. We have experimentally demonstrated that our graphene-metal composite wire offers thermally stable electrical properties up to 650 oC, far beyond the existing technologies for high-temperature conductors. The advantages of our NiGCu wire include exceptionally low electrical resistivity and high current density retention during and after thermal cycles. Our experimental and theoretical studies indicate that the enhanced material performance is mainly from the exceptional thermal stability and electrical properties of embedded graphene tubes at high temperatures. |