Ab-initio study of nanoporous phosphorene as anode material in rechargeable Li/Na ion batteries
| Autor: | R. Pilevar Shahri, M. Mehmandoust Khajeh Dad, Sh. Ebrahimi |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Materials science
Condensed matter physics Diffusion barrier Band gap Nanoporous General Physics and Astronomy 02 engineering and technology Surfaces and Interfaces General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences 0104 chemical sciences Surfaces Coatings and Films Anode Phosphorene chemistry.chemical_compound chemistry Density functional theory 0210 nano-technology Electronic band structure Nanosheet |
| Zdroj: | Applied Surface Science. 564:150155 |
| ISSN: | 0169-4332 |
| DOI: | 10.1016/j.apsusc.2021.150155 |
| Popis: | We have examined theoretically the capability of self-passivated porous phosphorene as anode material in fast rechargeable Li/Na ion batteries comparing to the perfect phosphorene nanosheet by performing density functional theory calculations. Creating nanopores with the diameter of about 6.5 A inside the perfect phosphorene nanosheet, the band gap grows and the susceptibility to absorb Li/Na atom increases, extracted from electronic calculations. The adsorption energy of Li/Na around the pore enhances respected to the perfect phosphorene. Open circuit voltage changes with adatom concentration for Li/ Na intercalation on porous phosphorene have also been discussed. Storage capacities of porous phosphorene have been calculated to be 243.31 mAh / g and 212.38 mAh / g for LIB and SIB respectively which are lower by the factor of 0.6 with respect to the reported values for perfect phosphorene. A significant charge of nearly one electron is transferred from Li/Na atom to perfect and porous nanosheets which make them electrically conductive required for a good anode material. Employing nudged elastic band theory revealed that both perfect and porous phosphorene have an open channel along zigzag direction for Li/Na diffusion due to low diffusion barrier while they have a forbidden channel along armchair orientation. |
| Databáze: | OpenAIRE |
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