Conversion Reaction of CoO Polycrystalline Thin Films Exposed to Atomic Lithium
| Autor: | Robert Bartynski, Mahsa Sina, Ryan Thorpe, Frederic Cosandey, Sylvie Rangan |
|---|---|
| Rok vydání: | 2013 |
| Předmět: |
Materials science
Analytical chemistry chemistry.chemical_element Crystal structure Electronic structure medicine.disease_cause Surfaces Coatings and Films Electronic Optical and Magnetic Materials Overlayer General Energy chemistry Transmission electron microscopy Electrode medicine Lithium Crystallite Physical and Theoretical Chemistry Ultraviolet |
| Zdroj: | The Journal of Physical Chemistry C. 117:14518-14525 |
| ISSN: | 1932-7455 1932-7447 |
| DOI: | 10.1021/jp404875g |
| Popis: | We have studied the reaction of 5 nm thick polycrystalline CoO films with atomic lithium as a model for the discharge of lithium-ion conversion battery electrodes. The electronic structure has been investigated with X-ray photoemission, ultraviolet photoemission, and inverse photoemission, while the morphology, crystal structure, and unoccupied states of the films have been examined with transmission electron microscopy. It is found that exposure to atomic lithium leads, at room temperature, to partial conversion with formation of Co and Li2O, but also of a Li2O2 or LiOH overlayer at the surface of the sample. As full conversion was obtained at 150 °C, a comparison with room-temperature measurements enables the understanding of the kinetic limitations during lithiation. |
| Databáze: | OpenAIRE |
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