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Upgrading of pine tannin biochars as electrochemical capacitor electrodes
dc.contributor.author | Pérez-Rodríguez, S. | |
dc.contributor.author | Pinto, Oscar | |
dc.contributor.author | Izquierdo, Maria Teresa | |
dc.contributor.author | Segura, Cristina | |
dc.contributor.author | Poon, Po S. | |
dc.contributor.author | Celzard, Alain | |
dc.contributor.author | Matos, Juan | |
dc.contributor.author | Fierro, Vanessa | |
dc.date.accessioned | 2021-06-22T15:44:03Z | |
dc.date.available | 2021-06-22T15:44:03Z | |
dc.date.issued | 2021-11 | |
dc.identifier | 10.1016/j.jcis.2021.05.162 | |
dc.identifier.issn | 00219797 | |
dc.identifier.uri | https://hdl.handle.net/20.500.12728/8937 | |
dc.description.abstract | Biochar derived from the pyrolysis of pine tannin is a green and available by-product of oil manufacturing that presents interesting features after having been activated by KOH at 650 °C. Different weight ratios of KOH to biochar were used and the resulting activated carbons (ACs) presented highly developed specific surface areas of up to 2190 m2 g−1, well-connected porosity and high oxygen content, leading to enhanced electrochemical performance when used as electrochemical capacitor electrodes in a 1 M H2SO4 aqueous electrolyte. Galvanostatic charge/discharge experiments evidenced that the best material achieved a maximum electrode capacitance of up to 232 F g−1 (at 0.5 A g−1) with a capacitance retention of 70% at 10 A g−1 using commercial mass loadings (i.e., approx. 10 mg cm−2). In addition, long cycling stability with a residual capacitance of 92 to 94% after 10,000 cycles at 5 A g−1 was achieved. These results prove that ACs derived from pine tannin biochars have great potential for their commercial use as electrochemical energy storage devices. | es_ES |
dc.language.iso | en | es_ES |
dc.publisher | Academic Press Inc. | es_ES |
dc.subject | Biochars | es_ES |
dc.subject | Electrochemical capacitors | es_ES |
dc.subject | KOH activation | es_ES |
dc.subject | Pyrolysis | es_ES |
dc.subject | Tannin | es_ES |
dc.title | Upgrading of pine tannin biochars as electrochemical capacitor electrodes | es_ES |
dc.type | Article | es_ES |