Hydrothermal Carbons from Hemicellulose-Derived Aqueous Hydrolysis Products as Electrode Materials for Supercapacitors

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Title: Hydrothermal Carbons from Hemicellulose-Derived Aqueous Hydrolysis Products as Electrode Materials for Supercapacitors
Authors: Falco, Camillo | Sieben, Juan Manuel | Brun, Nicolas | Sevilla Solís, Marta | Van der Mauelen, Torbjorn | Morallon, Emilia | Cazorla-Amorós, Diego | Titirici, Maria-Magdalena
Research Group/s: Electrocatálisis y Electroquímica de Polímeros | Materiales Carbonosos y Medio Ambiente
Center, Department or Service: Universidad de Alicante. Departamento de Química Física | Universidad de Alicante. Departamento de Química Inorgánica | Universidad de Alicante. Instituto Universitario de Materiales
Keywords: Biomass | Carbon | Green chemistry | Microporous materials | Supercapacitors
Knowledge Area: Química Física | Química Inorgánica
Issue Date: Feb-2013
Publisher: Wiley-VCH Verlag GmbH & Co. KGaA
Citation: ChemSusChem. 2013, 6(2): 374-382. doi:10.1002/cssc.201200817
Abstract: Acid pretreatment of lignocellulosic biomass, required for bioethanol production, generates large amounts of by-products, such as lignin and hydrolyzed hemicellulose fractions, which have found so far very limited applications. In this work, we demonstrate how the recovered hemicellulose hydrolysis products can be effectively utilized as a precursor for the synthesis of functional carbon materials through hydrothermal carbonization (HTC). The morphology and chemical structure of the synthesized HTC carbons are thoroughly characterized to highlight their similarities with glucose-derived HTC carbons. Furthermore, two routes for introducing porosity within the HTC carbon structure are presented: i) silica nanoparticle hard-templating, which is shown to be a viable method for the synthesis of carbonaceous hollow spheres; and ii) KOH chemical activation. The synthesized activated carbons (ACs) show an extremely high porosity (pore volume≈1.0 cm3 g−1) mostly composed of micropores (90 % of total pore volume). Because of their favorable textural properties, the ACs are further tested as electrodes for supercapacitors, yielding very promising results (300 F g−1 at 250 mA g−1) and confirming the high suitability of KOH-activated HTC carbons derived from spruce and corncob hydrolysis products as materials for electric double layer supercapacitors.
Sponsor: Financial support by the Ministerio de Ciencia e Innovación (MAT2010-15273 and CTQ2009-10813) and Generalitat Valenciana and FEDER (PROMETEO/2009/047 and ACOMP2012/133) projects are gratefully acknowledged. J.M.S. thanks Ministerio de Educación (SB2010-132).
URI: http://hdl.handle.net/10045/42793
ISSN: 1864-5631 (Print) | 1864-564X (Online)
DOI: 10.1002/cssc.201200817
Language: eng
Type: info:eu-repo/semantics/article
Rights: © 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Peer Review: si
Publisher version: http://dx.doi.org/10.1002/cssc.201200817
Appears in Collections:INV - GEPE - Artículos de Revistas
INV - MCMA - Artículos de Revistas

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