| Texto completo | |
| Autor(es): |
Khalid, Mohd
;
Paul, Rajib
;
Honorato, Ana M. B.
;
Varela, Hamilton
Número total de Autores: 4
|
| Tipo de documento: | Artigo Científico |
| Fonte: | JOURNAL OF ELECTROANALYTICAL CHEMISTRY; v. 863, p. 7-pg., 2020-04-15. |
| Resumo | |
Biomass comprises an attractive source of carbon materials for energy conversion and storage applications, because it provides a low cost and sustainable approach for the production of carbon-based electrode materials at large scale. Here, we demonstrate the preparation of a three-dimensional and hierarchical carbon foam (3DCF) from biorenewable Pinus nigra pine, using a chemical degradation method followed by two simple carbonization steps in presence of argon gas. The as-prepared 3DCF in supercapacitor electrode shows high scan rate capability up to 10 V s(-1), specific capacitance of 165 F g(-1) at the specific current of 3.3 A g(-1) in 6 M KOH electrolyte in three-electrode cell configuration, and retains 69.6% of its initial capacitance when the specific current increasedto 13.3 Ag-1. Furthermore, a 3DCF based symmetrical two-electrode cell has been constructed that shows a satisfactory specific energy of 6.6 Wh kg-1 at specific power of 2.3 kW kg(-1), and maintains the specific energy of about 50% at high specific power of 7.3 kW kg-1 under an operating voltage of 1.4 V in 2 M LiClO4 aqueous electrolyte. These results reveal a sustainable and low-cost electrode fabrication at large quantity for fabricating high performance supercapacitors with both KOH and Li-ion based electrolytes. (C) 2020 Elsevier B.V. All rights reserved. (AU) | |
| Processo FAPESP: | 13/16930-7 - Eletrocatálise V: processos eletrocatalíticos de interconversão entre as energias química e elétrica |
| Beneficiário: | Edson Antonio Ticianelli |
| Modalidade de apoio: | Auxílio à Pesquisa - Temático |