Carbon nanotubes functionalized by salts containing stereogenic heteroatoms as electrodes in their battery cells

• Main Authors: Zdanowska Sandra, Pyzalska Magdalena, Drabowicz Józef, Kulawik Damian, Pavlyuk Volodymyr, Girek Tomasz, Ciesielski Wojciech
• Format: Article
• Language: English
• Published: Sciendo 2016-12-01
• Series: Polish Journal of Chemical Technology
• Subjects: multi-walled carbon nanotubes (mwcnt); battery; bromination; charge transfer; x-ray spectroscopy; electronic structure
• Online Access: https://doi.org/10.1515/pjct-2016-0066

This paper concentrates on electrochemical properties of groups of multi-walled carbon nanotubes (MWCNT) functionalized with substituents containing a stereogenic heteroatom bonded covalently to the surface of the carbon nanotube. This system was tested in Swagelok-type cells. The cells comprised a system (functionalized CNT with salts containing S and P atoms) with a working electrode, microfiber separators soaked with electrolyte solution, and a lithium foil counter/reference (commercial LiCoO2) electrode. The electrolyte solution was 1 M LiPF6 in propylene carbonate. Using standard techniques (cyclic voltammetry/chronopotentiometry), galvanostatic cycling was performed on the cells at room temperature with a CH Instruments Model 600E potentiostat/galvanostat electrochemical measurements. Methods of functionalization CNT were compared in terms of the electrochemical properties of the studied systems. In all systems, the process of charge/discharge was observed.