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

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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.

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

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Publication details

The article was received on 14 Feb 2017, accepted on 25 Apr 2017 and first published on 25 Apr 2017


Article type: Paper
DOI: 10.1039/C7GC00491E
Citation: Green Chem., 2017, Advance Article
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    Outstanding electrochemical performance of highly N- and O-doped carbons derived from pine tannin

    A. Sanchez-Sanchez, M. T. Izquierdo, S. Mathieu, J. González-Álvarez, A. Celzard and V. Fierro, Green Chem., 2017, Advance Article , DOI: 10.1039/C7GC00491E

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