Fabrication of High Specific Electrical Conductivity and High Ampacity Carbon Nanotube/Copper Composite Wires
| Autor: | Mark E. Welland, Mohamed Basel Bazbouz, A. Aziz, Davor Copic, Michael De Volder |
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| Přispěvatelé: | Bazbouz, MB [0000-0002-0953-6691], Copic, D [0000-0002-9346-8846], De Volder, M [0000-0003-1955-2270], Apollo - University of Cambridge Repository |
| Rok vydání: | 2021 |
| Předmět: |
Technology
Materials science Fabrication Composite number Materials Science chemistry.chemical_element COPPER Materials Science Multidisciplinary AQUEOUS DISPERSIONS Carbon nanotube FILMS law.invention Physics Applied Electrical resistivity and conductivity law YARNS PARAMETER SPACE STRENGTH FIBERS SPUN Ampacity Composite material Nanoscience & Nanotechnology Science & Technology carbon nanotubes Physics THERMAL TRANSPORT composite wires PERFORMANCE Copper Electronic Optical and Magnetic Materials chemistry copper Physical Sciences ELECTRODEPOSITION Science & Technology - Other Topics ampacity microfluidization |
| Popis: | Carbon nanotubes and copper composites have long been predicted as new conductors that may benefit from the high conductivity of copper and the lightweight and very high ampacity of carbon nanotubes. One of the key challenges has been to integrate Cu with CNTs and form a free-standing composite wire. We have achieved this by first making a CNTs filament using high concentration (20 g L-1) CNTs dispersion, an acid-free wet spinning process and then by replacing the polymer with copper using heat based polymer decomposition and periodic pulse reverse electroplating. It has been demonstrated that indeed the specific conductivity and the current-carrying capability (or ampacity) are increased manifold. MWCNTs/Cu composite wires developed in this paper have electrical conductivity σ ~ 5.5 ×105 S cm-1. These MWCNTs/Cu wires are 2/3rd the weight of bulk Cu wires. Their specific electrical conductivity is σρ~ 9.38 ×104 S cm2 g-1 which is 45 % higher than International Annealed Copper Standard (IACS) Cu. These composite wires have an ampacity of A~ 20 ×105 A cm-2 and 4×105 A cm-2 for 1.5 mm and 17 mm gauge length wires respectively, which is 4 to 6 times higher than pure Cu depending on the wire lengths. MWCNTs volume percentage in the MWCNTs/Cu wire is about 40%. |
| Databáze: | OpenAIRE |
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