Insights into the Impact of Activators on the ‘Catalytic’ Graphitization to Design Anode Materials for Lithium Ion Batteries
In this work, we systematically investigate the ‘catalytic’ graphitization of a biomass precursor (coffee ground) using 10–60 wt. % of the activator iron (III) chloride hexahydrate in a temperature range of 1000 °C – 2400 °C. Special focus is put on the correlation of synthesis conditions, e. g., he...
| Autores: | , , , , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2022 |
| País: | España |
| Institución: | Universidad de Sevilla (US) |
| Repositorio: | idUS. Depósito de Investigación de la Universidad de Sevilla |
| OAI Identifier: | oai:idus.us.es:11441/161006 |
| Acceso en línea: | https://hdl.handle.net/11441/161006 https://doi.org/10.1002/celc.202200819 |
| Access Level: | acceso abierto |
| Palabra clave: | Activator Anode material Carbonization Lithium ion batteries ‘Catalytic’ graphitization |
| Sumario: | In this work, we systematically investigate the ‘catalytic’ graphitization of a biomass precursor (coffee ground) using 10–60 wt. % of the activator iron (III) chloride hexahydrate in a temperature range of 1000 °C – 2400 °C. Special focus is put on the correlation of synthesis conditions, e. g., heat treatment temperature and mass fraction of iron chloride, with the electrochemical performance in carbon||Li metal cells. The structural investigations of the materials reveal a positive impact of an increasing heat treatment temperature and/or mass fraction of inserted activator on the degree of graphitization and the delithiation capacity. However, a saturation point regarding the maximum degree of graphitization at 2000 °C and reversible capacity by the ‘catalytic’ graphitization approach using iron (III) chloride has been found. A maximum degree of graphitization of ≈69 % could be reached by applying 2000 °C and 40 wt. % FeCl3 ⋅ 6H2O, resulting in a reversible capacity of 235 mAh g−1. |
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