Enhanced electrical conductivity in graphene–copper multilayer composite

For many years, researchers have been trying to make a material more conductive than silver by incorporating carbon nanotubes or graphene into copper to form a composite material. However, after a decade-long effort, only a few groups reported successful results, raising concerns about the feasibili...

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Bibliographic Details
Published in:AIP advances 2022-01, Vol.12 (1), p.015310-015310-6
Main Authors: Pan, Chaochao, Gaur, Anand P. S., Lynn, Matthew, Olson, Madison P., Ouyang, Gaoyuan, Cui, Jun
Format: Article
Language:English
Subjects:
Carbon nanotubes
Chemical vapor deposition
Composite materials
Copper
Electrical conductivity
Electrical resistivity
Electronic transport
Graphene
MATERIALS SCIENCE
Multilayers
Nanotubes
Phonons
Room temperature
Substrates
Thickness
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Summary:For many years, researchers have been trying to make a material more conductive than silver by incorporating carbon nanotubes or graphene into copper to form a composite material. However, after a decade-long effort, only a few groups reported successful results, raising concerns about the feasibility of this composite approach. Here, we report our effort to validate the multilayer graphene–copper composite approach for improving electrical conductivity. We demonstrate that, with an estimated 0.008 vol. % graphene addition, copper’s electrical conductivity was improved to 104.2% of International Annealed Copper Standard (IACS) at room temperature. If the copper substrate used to make the multilayer composite is discounted using the parallel resistance model, the conductivity is calculated to be 185% IACS. This result could be further improved if the thickness of the copper layers can be further reduced.
ISSN:2158-3226
2158-3226
DOI:10.1063/5.0073879