Robust method for uniform coating of carbon nanotubes with V2O5 for next-generation transparent electrodes and Li-ion batteries† † Electronic supplementary information (ESI) available. See DOI: https://doi.org/10.1039/d3ra04342h

ABSTRACT: Composites comprising vanadium-pentoxide (V2O5) and single-walled carbon nanotubes (SWCNTs) are promising components for emerging applications in optoelectronics, solar cells, chemical and electrochemical sensors, etc. We propose a novel, simple, and facile approach for SWCNT covering with V2O5 by spin coating under ambient conditions. With the hydrolysis-polycondensation of the precursor (vanadyl triisopropoxide) directly on the surface of SWCNTs, the nm-thick layer of oxide is amorphous with a work function of 4.8 eV. The material recrystallizes after thermal treatment at 600 °C, achieving the work function of 5.8 eV. The key advantages of the method are that the obtained coating is uniform with a tunable thickness and does not require vacuuming or heating during processing. We demonstrate the groundbreaking results for two V2O5/SWCNT applications: transparent electrode and cathode for Li-ion batteries. As a transparent electrode, the composite shows stable sheet resistance of 160 Ω sq−1 at a 90% transmittance (550 nm) – the best performance reported for SWCNTs doped by metal oxides. As a cathode material, the obtained specific capacity (330 mA h g−1) is the highest among all the other V2O5/SWCNT cathodes reported so far. This approach opens new horizons for the creation of the next generation of metal oxide composites for various applications, including optoelectronics and electrochemistry. We developed a method for SWCNT coating with V2O5via hydrolysis-polycondensation. It is applied for a transparent electrode with 160 Ω sq−1 sheet resistance at a 90% transmittance and for a Li-ion battery cathode with 330 mA h g−1 specific capacity.

SUBMITTER: Ilatovskii D 

PROVIDER: S-EPMC10467569 | biostudies-literature | 2023 Aug

REPOSITORIES: biostudies-literature