Intercalation and conversion reactions in Ni0.5TiOPO4 Li-ion battery anode materials
| Autor: | Ismael Saadoune, Karima Lasri, Mohammed Dahbi, Kristina Edström, Anti Liivat, Daniel Brandell |
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| Rok vydání: | 2013 |
| Předmět: |
Battery (electricity)
Materials science Renewable Energy Sustainability and the Environment Intercalation (chemistry) Inorganic chemistry Energy Engineering and Power Technology Electrochemistry Redox Anode Crystallinity Electrical and Electronic Engineering Physical and Theoretical Chemistry Pyrolysis Sol-gel |
| Zdroj: | Journal of Power Sources. 229:265-271 |
| ISSN: | 0378-7753 |
| DOI: | 10.1016/j.jpowsour.2012.12.031 |
| Popis: | The Ni0.5TiOPO4/C composite Li-ion battery anode material has been prepared by a sol–gel method with a subsequent pyrolysis step for the formation of C-coating. The resulting sub-micronsized particles displayed a narrow particle size distribution and a corresponding high electrochemical activity which, in turn, facilitates in-depth analysis of the electrochemical behavior of the material. It is shown that by limiting the degree of lithiation in the material, the redox potential in subsequent cycles is substantially affected. Ex-situ XRD reveals a gradual evolution of the structure during cycling of the material, with lower crystallinity after the first discharge cycle. By correlating the electrochemical properties with the structural studies, new insights into the electrochemical behavior of the Ni0.5TiOPO4/C anode material are achieved, suggesting a combination of intercalation and conversion reactions. |
| Databáze: | OpenAIRE |
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