 pristine and boron doped by phenylene nanotubes, BPNT and BBPNT, respectively, were investigated using DFT to determine their suitability as anodes for sodium ion batteries. The results showed that both structures had a metallic character, indicating they would be suitable for electron transfer during charging slash discharging cycles. Additionally, doping with boron improved the adsorption inside and outside the nanotube, while also reducing the energy barriers for sodium ions to enter the interior of the tube. Furthermore, the calculated OCV profiles confirmed that BBPNT was within the acceptable voltage range for sodium ion batteries, suggesting it could be used as an anode material for such devices. Finally, the theoretical capacity of 403.82 mAh g-1 was obtained for BBPNT, demonstrating its potential for use in sodium ion batteries. This article was authored by Mohsen Vafi, Miriam Farajika Mogadam and Maktar Nizroloper. We are article.tv, links in the description below.