Intercalated carbon nanotube fibers with high specific electrical conductivity

• 成果类型: Article
• 署名作者: de Isidro-Gomez, A. I.; Vassilev-Galindo, V.; Mikhalchan, A.; Pelaez-Fernandez, M.; LLorca, J.; Arenal, R.; Vilatela, J. J.
• 署名单位: IMDEA Materials Institute; Autonomous University of Madrid; Universidad Publica de Navarra; Consejo Superior de Investigaciones Cientificas (CSIC); University of Zaragoza; University of Zaragoza; Universidad Politecnica de Madrid
• 刊物名称: SCIENCE
• ISSN/ISSBN: 0036-8075; 1095-9203
• DOI: 10.1126/science.aeb0673
• 发表日期: 2026-04-23
• 页码: 395-400
• 关键词: raman; bundles

摘要

Translating the conductivity of individual carbon nanotubes into practical, macroscopic conductors remains a challenge. We report highly aligned fibers of double-walled carbon nanotubes intercalated with chains of tetrachloroaluminate anions (AlCl4-) in the intertube channels. The AlCl4- intercalant acts as a noncovalent dopant, accepting 0.65 electrons per anion, mostly from the outer nanotube layer. Combined with a 17% intercalant volume fraction, it produces an increase in room-temperature conductivity to values as high as 24.5 mega-Siemens per meter, which is 41% of that of copper. Specific conductivity values reach 17,345 Siemens-meter squared per kilogram, which is superior to that of metals. These fibers are five times stronger and half the weight of conventional overhead cables while remaining stable in dry conditions and retaining 80% of their conductivity protected from moisture by a cable polymer sheath.