Jump to main content
Jump to site search

Issue 30, 2015
Previous Article Next Article

Electrochemical behaviour of activated carbons obtained via hydrothermal carbonization

Author affiliations

Abstract

Activated carbons were prepared by chemical activation of hydrochars, obtained by hydrothermal carbonisation (HTC) using low cost and abundant precursors such as rye straw and cellulose, with KOH. Hydrochars derived from rye straw were chemically activated using different KOH/precursor ratios, in order to assess the effect of this parameter on their electrochemical behaviour. In the case of cellulose, the influence of the hydrothermal carbonisation temperature was studied by fixing the activating agent/cellulose ratio. Furthermore, N-doped activated carbons were synthesised by KOH activation of hydrochars prepared by HTC from a mixture of glucose with melamine or glucosamine. In this way, N-doped activated carbons were prepared in order to evaluate the influence of nitrogen groups on their electrochemical behaviour in acidic medium. The results showed that parameters such as chemical activation or carbonisation temperature clearly affect the capacitance, since these parameters play a key role in the textural properties of activated carbons. Finally, symmetric capacitors based on activated carbon and N-doped activated carbon were tested at 1.3 V in a two-electrode cell configuration and the results revealed that N-groups improved the capacitance at high current density.

Graphical abstract: Electrochemical behaviour of activated carbons obtained via hydrothermal carbonization

Back to tab navigation

Supplementary files

Publication details

The article was received on 15 May 2015, accepted on 16 Jun 2015 and first published on 18 Jun 2015


Article type: Paper
DOI: 10.1039/C5TA03574K
Author version
available:
Download author version (PDF)
Citation: J. Mater. Chem. A, 2015,3, 15558-15567
  •   Request permissions

    Electrochemical behaviour of activated carbons obtained via hydrothermal carbonization

    D. Salinas-Torres, D. Lozano-Castelló, M. M. Titirici, L. Zhao, L. Yu, E. Morallón and D. Cazorla-Amoros, J. Mater. Chem. A, 2015, 3, 15558
    DOI: 10.1039/C5TA03574K

Search articles by author

Spotlight

Advertisements