Experimental and theoretical determination of the low-loss electron energy loss spectroscopy of LiMn2O4
The dielectric properties of cubic spinel-type LiMn2O4, used as cathode material in lithium ion secondary batteries, are studied by analyzing the low-loss region of the electron energy loss spectroscopy (EELS) spectrum in a transmission electronmicroscope. A comparison of experimental EELS spectra a...
| Autores: | , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión enviada para evaluación y publicación |
| Fecha de publicación: | 2009 |
| País: | México |
| Institución: | Centro de Investigación en Materiales Avanzados |
| Repositorio: | Fuente de Objetos Científicos Open Access del CIMAV |
| Idioma: | inglés |
| OAI Identifier: | oai:cimav.repositorioinstitucional.mx:1004/1165 |
| Acceso en línea: | http://cimav.repositorioinstitucional.mx/jspui/handle/1004/1165 |
| Access Level: | acceso abierto |
| Palabra clave: | info:eu-repo/classification/Ab initio/EELS info:eu-repo/classification/Limn2O4/Electron structure info:eu-repo/classification/cti/1 info:eu-repo/classification/cti/22 info:eu-repo/classification/cti/2299 info:eu-repo/classification/cti/229999 |
| Sumario: | The dielectric properties of cubic spinel-type LiMn2O4, used as cathode material in lithium ion secondary batteries, are studied by analyzing the low-loss region of the electron energy loss spectroscopy (EELS) spectrum in a transmission electronmicroscope. A comparison of experimental EELS spectra and ab initio density-functional theory calculations (WIEN2k code) within the generalized gradient approximation (GGA) is presented. The origins of interband transitions are identified in the electronic band structure, by calculating the partial imaginary part of the dielectric function and the partial density of states of Li, Mn and O. Good agreement with experimental spectra is observed which allowed interpreting main features of the EELS spectrum. |
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