Nanowerk June 21, 2023 Researchers in South Korea used to prepare floating catalyst–chemical vapor deposition-derived CNT sheets for potential use as all-around current collectors in two representative energy storage devices: batteries and electrochemical capacitors. CNT-based current collectors enhance ion transport kinetics and provide many ion adsorption and desorption sites, which are crucial for improving the performance of batteries and electrochemical capacitors. They demonstrated high-performance lithium-ion hybrid capacitors (LIHCs) by assembling activated carbon–CNT cathodes and prelithiated graphite–CNT anodes. CNT-based LIHCs exhibit 170% larger volumetric capacities, 24% faster rate capabilities, and 21% enhanced cycling stabilities relative to LIHCs based on conventional metallic […]
Category Archives: Carbon nanotube
Carbon nanotube films open up new prospects for electronics
Nanowerk February 10, 2022 An international team of researchers (Russia, Finland) studied carbon nanotube films conductivity in the terahertz and infrared bands. Some of the films were made of nanotubes with lengths varying from 0.3 to 13 µm, while others were treated with oxygen plasma for 100 to 400 seconds and changed their electrodynamic properties in the process. They discovered that shortening tubes length (down to 0.3 µm) or exposing films to plasma (for longer than 100 s) leads to a drop in conductivity at low terahertz frequencies (< 0.3 THz). Exposure to plasma results in a larger number of […]
Clean carbon nanotubes with superb properties
Eurekalert November 19, 2019 An international team of researchers (Finland, USA – Rice University, Japan) has developed a new method to fabricate single-wall carbon nanotubes (SWCNT). They used aerosols of metal catalysts and gasses containing carbon which allows the researchers to carefully control the nanotube structure directly. The devices do not contain degrading processing chemicals on their surface. The method makes it possible to fabricate hundreds of individual carbon nanotube devices within 3 hours as opposed to the current method. They have shown that the aerosol-based nanotubes are superb in terms of their electronic quality. These clean devices help to […]