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Outstanding electrochemical performance of highly N- and O-doped carbons derived from pine tannin

Abstract : Highly N- and O-doped carbons were prepared from pine tannins by hydrothermal carbonisation (HTC) and subsequently applied as materials for supercapacitor electrodes. Pine tannins were transformed into carbon materials by using environment-friendly solvents (water or ammonia) without applying any activation or functionalisation post-treatment. Depending on the solution used for extracting tannins and on the HTC method, carbons with different physicochemical and electrochemical properties were obtained. The material prepared from the water-extracted tannin and subjected to HTC in ammonia displayed a porous texture composed of: (a) low ultramicroporosity and well-developed mesoporosity; (b) a hydrophilic surface with a high density of surface functionalities; and (c) a high nanotextural order. These features accounted for the excellent electrochemical performance of the resultant carbon electrode in terms of high rate capability up to 1 V s−1, high energy density up to ∼1500 mA g−1, low cell resistance and fast frequency response, making it a suitable material for practical supercapacitors.
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Submitted on : Wednesday, February 9, 2022 - 6:33:04 PM
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Angela Sanchez-Sanchez, Maria Teresa Izquierdo, Sandrine Mathieu, Julia González-Álvarez, Alain Celzard, et al.. Outstanding electrochemical performance of highly N- and O-doped carbons derived from pine tannin. Green Chemistry, Royal Society of Chemistry, 2017, 19 (11), pp.2653-2665. ⟨10.1039/C7GC00491E⟩. ⟨hal-03563597⟩



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