Efficient Fabrication of High-Quality Single-Walled Carbon Nanotubes and Their Macroscopic Conductive Fibers

Jiao, Xinyu; Shi, Chao; Zhao, Yiming; Xu, Lele; Liu, Shaokang; Hou, Peng‐Xiang; Liu, Chang; Cheng, Hui‐Ming

doi:10.1021/acsnano.2c05876

Cited by 13 publications

(10 citation statements)

References 49 publications

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“…Briefly, wet-spun SWCNT fibers were wound on a stainless-steel frame for magnetron sputtering and the following electrochemical deposition of Cu. Details of the fabrication of the SWCNT fibers 38 (Figures S1 and S2), coating with Cu seeds by magnetron sputtering, and the electrochemical deposition of a uniform Cu shell are described in the Experimental Methods section. An optical image of the obtained SWCNT/Cu core−shell fiber (Figure 1b) shows a metallic luster with a purple-red color.…”

Section: Resultsmentioning

confidence: 99%

“…Fabrication of SWCNT Fiber. The SWCNT fibers were fabricated by a wet-spinning method, 38 and a schematic of the experimental setup is shown in Figure S1. First, high-quality SWCNTs synthesized by floating catalyst chemical vapor deposition were mixed with 99% chlorosulfuric acid (CSA, Sigma-Aldrich) to form a spinnable liquid crystalline solution (1.6 wt %) by using a planet mixer (FlackTek SpeedMixer DAC150.1 FVZ-K).…”

Section: Experimental Methodsmentioning

confidence: 99%

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Single-Walled Carbon Nanotube/Copper Core–Shell Fibers with a High Specific Electrical Conductivity

Jiao

Shi

et al. 2023

ACS Nano

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Carbon nanotube (CNT)/Cu core−shell fibers are a promising material for lightweight conductors due to their higher conductivity than pure CNT fibers and lower density than traditional Cu wires. However, the electrical properties of the hybrid fiber have been unsatisfactory, mainly because of the weak CNT−Cu interfacial interaction. Here we report the fabrication of a single-walled CNT (SWCNT)/Cu core−shell fiber that outperforms commercial Cu wires in terms of specific electrical conductivity and current carrying capacity. A dense and uniform Cu shell was coated on the surface of wet-spun SWCNT fibers using a combination of magnetron sputtering and electrochemical deposition. Our SWCNT/Cu core−shell fibers had an ultrahigh specific electrical conductivity of (1.01 ± 0.04) × 10 4 S m 2 kg −1 , 56% higher than Cu. Experimental and simulation results show that oxygen-containing functional groups on the surface of a wetspun SWCNT fiber interact with the sputtered Cu atoms to produce strong bonding. Our hybrid fiber preserved its integrity and conductivity well after more than 5000 bending cycles. Furthermore, the current carrying capacity of the coaxial fiber reached 3.14 × 10 5 A cm −2 , three times that of commercial Cu wires.

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Section: Resultsmentioning

confidence: 99%

Section: Experimental Methodsmentioning

confidence: 99%

Single-Walled Carbon Nanotube/Copper Core–Shell Fibers with a High Specific Electrical Conductivity

Jiao

Shi

et al. 2023

ACS Nano

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“…Macroscopic SWCNTFs with an electrical conductivity of 6.67 × 10 6 S/m were prepared using a wet-spinning method in our lab . Schematics of a SWCNTF with the deposited Ni layer SWCNTF (Ni-SWCNTF) and the electrodeposition setup used are shown in Figure a,b, respectively.…”

Section: Resultsmentioning

confidence: 99%

“…Fabrication of Ni-SWCNTFs. High quality SWCNTs 27,35 and SWCNTFs 27 were prepared in our lab. The Ni layer was produced by DC electrodeposition on the SWCNTF surface at the soldering position with a standard two-electrode arrangement.…”

Section: Experimental Methodsmentioning

confidence: 99%

“…Macroscopic SWCNTFs with an electrical conductivity of 6.67 × 10 6 S/m were prepared using a wet-spinning method in our lab. 27 Schematics of a SWCNTF with the deposited Ni layer SWCNTF (Ni-SWCNTF) and the electrodeposition setup used are shown in Figure 1a,b, respectively. The Ni layer was coated on the target position of SWCNTFs by a quick electrodeposition method (for details, see Experimental Methods).…”

Section: Controlled Addition Of a Ni Layer On Swcntfsmentioning

confidence: 99%

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Strong Connection of Single-Wall Carbon Nanotube Fibers with a Copper Substrate Using an Intermediate Nickel Layer

Gao,

Xu,

Jiao

et al. 2023

ACS Nano

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Lightweight carbon nanotube fibers (CNTFs) with high electrical conductivity and high tensile strength are considered to be an ideal wiring medium for a wide range of applications. However, connecting CNTFs with metals by soldering is extremely difficult due to the nonreactive nature and poor wettability of CNTs. Here we report a strong connection between single-wall CNTFs (SWCNTFs) and a Cu matrix by introducing an intermediate Ni layer, which enables the formation of mechanically strong and electrically conductive joints between SWCNTFs and a eutectic Sn-37Pb alloy. The electrical resistance change rate (ΔR/R 0 ) of Ni-SWCNTF/solder-Cu interconnects only decreases ∼29.8% after 450 thermal shock cycles between temperatures of −196 and 150 °C, which is 8.2 times lower than that without the Ni layer. First-principles calculations indicate that the introduction of the Ni layer significantly improves the heterogeneous interfacial bond strength of the Ni-SWCNTF/solder-Cu connections.

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Wet Twisting in Spinning for Rapid and Cost‐Effective Fabrication of Superior Carbon Nanotube Yarns

Zhao,

Kong,

Tao

et al. 2024

Adv Funct Materials

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Carbon nanotubes (CNTs) are promising blocks for building advanced yarns with unique structural and functional attributes. However, the complexity of fabrication and high cost has hindered the widespread adoption of CNT yarns. In this study, a rapid and continuous twisting wet spun yarn strategy to produce highly densified CNT yarns is presented. The method involves effectively dispersing CNTs in the surfactant dispersion, swiftly removing the surfactant in the coagulation bath and twisting treatment to effectively improve the density of yarn and the orientation of CNT. Detailed characterizations on the influence of each spinning conditions reveal that twisting treatment significantly enhances the packing density of yarns, improves the orientation of CNTs, and mitigates the impact of impurities on conductivity. The resulting CNT yarns exhibit a remarkable tensile strength of 600 MPa, a Young's modulus of ≈40 GPa, and a high conductivity of 8990 S cm−1. When utilized as a yarn heater, the CNT yarn demonstrates an ultra‐fast electrothermal response of over 1000 °C s−1 at a low operating voltage of 5 V. Impressively, the mechanical properties of CNT yarns show good stability during heating. This study provides a perspective of structural engineering for the large‐scale preparation of high‐performance CNT yarns.

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Efficient Fabrication of High-Quality Single-Walled Carbon Nanotubes and Their Macroscopic Conductive Fibers

Cited by 13 publications

References 49 publications

Single-Walled Carbon Nanotube/Copper Core–Shell Fibers with a High Specific Electrical Conductivity

Single-Walled Carbon Nanotube/Copper Core–Shell Fibers with a High Specific Electrical Conductivity

Strong Connection of Single-Wall Carbon Nanotube Fibers with a Copper Substrate Using an Intermediate Nickel Layer

Wet Twisting in Spinning for Rapid and Cost‐Effective Fabrication of Superior Carbon Nanotube Yarns

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