Outstanding electrochemical performance of highly N- and O-doped carbons derived from pine tannin. Issue 11 (12th May 2017)

• Record Type: Journal Article
• Authors: Sanchez-Sanchez, Angela; Izquierdo, Maria Teresa; Mathieu, Sandrine; González-Álvarez, Julia; Celzard, Alain; Fierro, Vanessa
• Is Part Of: Green chemistry. Volume 19:Issue 11(2017)
• Page Start: 2653
• Page End: 2665
• Publication Date: 2017-05-12
• Subjects: Environmental chemistry -- Industrial applications -- Periodicals; Environmental management -- Periodicals; 660
• DOI: 10.1039/c7gc00491e
• Languages: English
• ISSNs: 1463-9262

Abstract

Abstract : N- and O-doped carbons obtained from water-extracted pine tannins exhibited high performance when applied as electrodes for supercapacitors. 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.