A single route for the production of battery-type and capacitor-type electrode materials
The quest for green and effective synthetic routes towards energy grade materials is of utmost relevance in the transition to a fossil-free energy model. In a previous work we have shown the promising role of harmless MgSO4 in the synthesis of S-doped carbon anodes for fast sodium storage. Herein, w...
| Autores: | , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2025 |
| País: | España |
| Institución: | Consejo Superior de Investigaciones Científicas (CSIC) |
| Repositorio: | DIGITAL.CSIC. Repositorio Institucional del CSIC |
| OAI Identifier: | oai:digital.csic.es:10261/380575 |
| Acceso en línea: | http://hdl.handle.net/10261/380575 https://api.elsevier.com/content/abstract/scopus_id/85216191823 |
| Access Level: | acceso abierto |
| Palabra clave: | Sodium-ion capacitor Energy storage Porous carbon http://metadata.un.org/sdg/9 http://metadata.un.org/sdg/7 Ensure access to affordable, reliable, sustainable and modern energy for all Build resilient infrastructure, promote inclusive and sustainable industrialization and foster innovation |
| Sumario: | The quest for green and effective synthetic routes towards energy grade materials is of utmost relevance in the transition to a fossil-free energy model. In a previous work we have shown the promising role of harmless MgSO4 in the synthesis of S-doped carbon anodes for fast sodium storage. Herein, we show that the same simple procedure can be used for the production of high surface, supercapacitor-type materials, by merely changing the temperature of the thermal treatment. We also found that the addition of an inert salt such as KCl -in small amounts- greatly boosts the porogenic activity of MgSO4, leading to carbons with SBET above 2000 m2 g−1. As a proof of concept, and using biomass-based substances as carbon precursors, we have built a hybrid sodium-ion capacitor out of a S-doped carbon and a highly porous carbon, both of them prepared using similar MgSO4-assisted synthetic schemes. The full cell built with similar positive and negative electrode masses exhibited a good energy/power performance (38Wh kg−1 at 22 kW kg−1), as well as a very robust cycling stability, with a capacity fade of only 0.00078 % cycle−1. |
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