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Two-step experimental analysis of CFs/CNTs-Cu for bilayer bonding in electrical wiring

  • Carbon Letters
  • Abbr : Carbon Lett.
  • 2025, 35(6), pp.2953~2966
  • DOI : 10.1007/s42823-025-00968-6
  • Publisher : Korean Carbon Society
  • Research Area : Natural Science > Natural Science General > Other Natural Sciences General
  • Received : May 13, 2025
  • Accepted : August 11, 2025
  • Published : December 11, 2025

Iqbal Akhtar 1 Yang Yang 1 Dong Jianwei 1 Khan Amir Ali 1 Zhang Yixuan 1 Bi Yuanbo 1 Luo Zhen 1

1Tianjin University

Accredited

ABSTRACT

Carbon fibers (CFs) are notable for their lightweight, high strength, and excellent electrical conductivity, making them promising for applications like electrical wiring. However, integrating CFs into copper-based wiring systems faces challenges, particularly regarding conductivity loss in fractured CFs. This article discusses a two-step experiment to enhance electrical and mechanical connection. Electrothermal-induced solvent evaporation (EISE) and meniscus-confined electrochemical deposition (MECD) were identified as effective methods for welding fractured CFs and were successfully implemented in open-air environment. Deposition of carbon nanotubes (CNTs) around the fiber improved conductivity by reducing fiber-to-fiber contact resistance and creating a metal-like surface. Microstructural analysis and EDS analysis revealed that the CNT cladding exhibited high density and fewer irregularities and bulges in the joint area. Furthermore, the CNTs were tangled, forming a less organized structure compared to the original CF. In contrast, the Cu cladding exhibited paint-like coverage, significant irregularities, bulges, and cracks but maintained a small thickness. Electrical testing revealed that the average resistance of a single joined fiber decreased to resistance of 11.45 Ω and an electrical resistivity of 2.27 Ω/m, demonstrating improved electrical conductivity. Under optimal conditions, the joined fibers exhibited plastic fracture, and all joints showed improved performance except joint 1.e-g enhanced mechanical strength and stress tolerance.

Citation status

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