First-principles calculations of stability of graphene-like BC3 monolayer and its high-performance potassium storage
| Autor: | Guangyao Zhou, Shulai Lei, Jinli Tan, Liangxu Lin, Lijie Zhao, Yi Li, Jiajun Wang |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Materials science
Diffusion barrier Graphene Diffusion Potassium chemistry.chemical_element 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology Alkali metal 01 natural sciences 0104 chemical sciences law.invention chemistry Chemical physics law Monolayer Lithium 0210 nano-technology Lithium atom |
| Zdroj: | Chinese Chemical Letters. 32:900-905 |
| ISSN: | 1001-8417 |
| DOI: | 10.1016/j.cclet.2020.07.016 |
| Popis: | With increasing demand for renewable energy, graphene-like BC3 monolayer as high performance electrode materials for lithium and sodium batteries are drawing more attention recently. However, its structural stability, potassium storage properties and strain effect on adsorption properties of alkali metal ions have not been reported yet. In this work, phonon spectra, AIMD simulations and elastic constants of graphene-like BC3 monolayer are investigated. Our results show that graphene-like BC3 monolayer possesses excellent structural stability and the maximum theoretical potassium storage capacity can reach up to 1653 mA h/g with the corresponding open circuit voltages 0.66 V. Due to potassium atom can be effectively adsorbed at the most energetically favorable h-CC site with obvious charge transfer, making adsorbed graphene-like BC3 monolayer change from semiconductor to metal which is really good for electrode utilization. Moreover, the migrations potassium atom on the graphene-like BC3 monolayer is rather fast with the diffusion barriers as low as 0.12 eV, comparing lithium atom with a relatively large diffusion barrier of 0.46 eV. Additionally, the tensile strains applied on the graphene-like BC3 monolayer have marginal effect on the adsorption and diffusion performances of lithium, sodium and potassium atoms. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect