AI Article Synopsis
- Biochar produced from pine tannin through pyrolysis and activated with KOH shows promising properties for use as activated carbon in energy storage.
- The activation process resulted in highly developed surface areas and increased porosity, facilitating enhanced electrochemical performance in capacitors.
- Testing revealed a maximum electrode capacitance of 232 F/g and impressive long-term stability, indicating strong potential for commercial applications in electrochemical energy storage.
Article 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 m g, well-connected porosity and high oxygen content, leading to enhanced electrochemical performance when used as electrochemical capacitor electrodes in a 1 M HSO aqueous electrolyte. Galvanostatic charge/discharge experiments evidenced that the best material achieved a maximum electrode capacitance of up to 232 F g (at 0.5 A g) with a capacitance retention of 70% at 10 A g using commercial mass loadings (i.e., approx. 10 mg cm). In addition, long cycling stability with a residual capacitance of 92 to 94% after 10,000 cycles at 5 A g was achieved. These results prove that ACs derived from pine tannin biochars have great potential for their commercial use as electrochemical energy storage devices.
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| http://dx.doi.org/10.1016/j.jcis.2021.05.162 | DOI Listing |
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