Influence of texture in hybrid carbon-phosphomolybdic acid materials on their performance as electrodes in supercapacitors
In this paper, phosphomolybdic acid HPMoO (PMo) was anchored to four synthetic micro-mesoporous carbons and a commercial one to analyse the relationship between the porous texture of the support, the PMo adsorption and the performance of the resulting hybrid materials as electrodes in supercapacitor...
| Autores: | , , , , , , , |
|---|---|
| Tipo de recurso: | artículo |
| Fecha de publicación: | 2017 |
| País: | España |
| Institución: | Universitat Autònoma de Barcelona |
| Repositorio: | Dipòsit Digital de Documents de la UAB |
| Idioma: | inglés |
| OAI Identifier: | oai:ddd.uab.cat:311776 |
| Acceso en línea: | https://ddd.uab.cat/record/311776 https://dx.doi.org/urn:doi:10.1016/j.carbon.2016.09.054 |
| Access Level: | acceso abierto |
| Palabra clave: | Carbon electrode Gravimetric energy densities Mesoporous carbon Micropore volumes Phosphomolybdic acid Porous texture Super capacitor Volumetric energy densities |
| Sumario: | In this paper, phosphomolybdic acid HPMoO (PMo) was anchored to four synthetic micro-mesoporous carbons and a commercial one to analyse the relationship between the porous texture of the support, the PMo adsorption and the performance of the resulting hybrid materials as electrodes in supercapacitors. The uptake of PMo on carbon supports follows a clear correlation with the micropore volume, which implies that PMo is mainly adsorbed in microporosity as a consequence of a greater confinement in this kind of pores instead of mesopores. Transmission electron microscopy indicates that the PMo adsorbed is homogeneously dispersed in the carbon texture. Finally, the addition of PMo to the original carbon electrodes provided capacitances up to 293 F per gram of electrode, substantially larger than the 206-240 F g of the unmodified activated carbon. This result represented an increase of up to 35% in terms of gravimetric energy density and 160% in terms of volumetric energy density, after PMo integration into the carbon matrix. |
|---|