Zigzag and armchair AlN nanotubes as anode materials for Mg-ion batteries: Computational study


Yasar S., Söğütlü İ., Mert H., Mert N., Vessally E., Lin Y.

Solid State Sciences, vol.110, 2020 (Peer-Reviewed Journal) identifier identifier

  • Publication Type: Article / Article
  • Volume: 110
  • Publication Date: 2020
  • Doi Number: 10.1016/j.solidstatesciences.2020.106448
  • Journal Name: Solid State Sciences
  • Journal Indexes: Science Citation Index Expanded, Scopus, Academic Search Premier, PASCAL, Aerospace Database, Biotechnology Research Abstracts, Chemical Abstracts Core, Chimica, Communication Abstracts, Compendex, INSPEC, Metadex, Civil Engineering Abstracts
  • Keywords: Nanostructures, Ion batteries, DFT, Adsorption, ELECTRODE MATERIALS, NITRIDE NANOTUBES, CATHODE MATERIALS, CARBON NANOTUBES, FACILE SYNTHESIS, GRAPHENE OXIDE, AIN NANOTUBES, LITHIUM, LI, MAGNESIUM

Abstract

© 2020 Elsevier Masson SASWe studied the potential application of a zigzag and an armchair AlN nanotube (AlNNT) as an anode material for the Mg-ion batteries (MIBs) using B3LYP-gCP-D3/6-31G* model chemistry. The Mg2+ adsorption energy on the zigzag or armchair AlNNTs is −217.2 or −234.9 kcal/mol, but the Mg atom interaction is much weaker and the adsorption energy is −10.5 or −5.3 kcal/mol. The dispersion term is much more important for the Mg interaction compared to the Mg2+. This term includes 68.6% of the Mg atom adsorption energy on the zigzag tube while its contribution for Mg cation adsorption is about 3.8%. The maximum energy barrier for an Mg2+ migration and cell voltage are 6.1 kcal/mol and 4.47 V for zigzag and 5.3 kcal/mol and 4.95 V for armchair AlNNT, respectively. Thus, the AlNNTs provide a great ion mobility leading to a faster charge/discharge rate because of small energy barriers. The larger cell voltage, and higher ion mobility suggest the armchair AlNNTs as a plausible anode material for application in the anode of MIBs, compared to the zigzag AlNNT. The effect of Mg/Mg2+ adsorption on the electronic properties of AlNNTs is also discussed.