Structural evolution and reaction mechanism of lithium nickelate (LiNiO2) during the carbonation reaction
| Autor: | Heriberto Pfeiffer, Daniela González-Varela, Brenda Alcántar-Vázquez |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Thermogravimetric analysis
Phase transition Reaction mechanism Materials science Scanning electron microscope Carbonation Sintering chemistry.chemical_element 02 engineering and technology 010402 general chemistry 01 natural sciences Lithium nickelate lcsh:TA401-492 Lithium diffusion coefficient CO2 chemisorption Metals and Alloys 021001 nanoscience & nanotechnology 0104 chemical sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials Nickel chemistry Physical chemistry Lithium lcsh:Materials of engineering and construction. Mechanics of materials 0210 nano-technology |
| Zdroj: | Journal of Materiomics, Vol 4, Iss 1, Pp 56-61 (2018) |
| ISSN: | 2352-8478 |
| Popis: | Lithium nickelate (LiNiO2) was synthesized using the lithium excess method, and then characterized by X-ray diffraction, scanning electron microscopy and N2 adsorption-desorption. Finally, differential thermal and thermogravimetric analyses were performed in CO2 presence, at high temperatures. Results show that LiNiO2 is able to react with CO2 through a complex structural evolution process, where lithium atoms are released to produce Li2CO3, while some nickel atoms are rearranged on different Li1-xNi1+xO2 crystalline phases. LiNiO2-CO2 reaction kinetic parameters were determined assuming a first-order reaction, where kinetic constants tended to increase as a function of temperature. However, kinetic constant values did not follow a linear trend. This atypical behavior was attributed to LiNiO2 sintering and crystalline evolution performed as a function of temperature. |
| Databáze: | OpenAIRE |
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