| Autor: |
Zeng, H, Liu, D, Zhang, Y, See, KA, Jun, YS, Wu, G, Gerbec, JA, Ji, X, Stucky, GD |
| Jazyk: |
angličtina |
| Rok vydání: |
2015 |
| Zdroj: |
Zeng, H; Liu, D; Zhang, Y; See, KA; Jun, YS; Wu, G; et al.(2015). Nanostructured Mn-Doped V2O5 Cathode Material Fabricated from Layered Vanadium Jarosite. Chemistry of Materials, 27(21), 7331-7336. doi: 10.1021/acs.chemmater.5b02840. UC Santa Barbara: Retrieved from: http://www.escholarship.org/uc/item/8bz9927r |
| DOI: |
10.1021/acs.chemmater.5b02840. |
| Popis: |
© 2015 American Chemical Society. We propose a nanostructured Mn-doped V2O5 lithium-ion battery cathode material that facilitates cathodic charge transport. The synthesis strategy uses a layered compound, vanadium(III) jarosite, as the precursor, in which the Mn2+ ions are doped uniformly between the vanadium oxide crystal layers. Through a two-step transformation, the vanadium jarosite was converted into Mn2+-doped V2O5. The resulting aliovalent doping of the larger Mn cations in the modified V2O5 structure increases the cell volume, which facilitates diffusion of Li+ ions, and introduces oxygen vacancies that improve the electronic conductivity. Comparison of the electrochemical performance in Li-ion batteries of undoped and the Mn2+-doped V2O5 hierarchical structure made from layered vanadium jarosite confirms that the Mn-doping improves ion transport to give a high cathodic columbic capacity (253 mAhg-1 at 1C, 86% of the theoretical value, 294 mAhg-1) and excellent cycling stability. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
|
