Temperature effect on the synthesis of lignin-derived carbons for electrochemical energy storage applications
Artikel i vetenskaplig tidskrift, 2018

Herein, we present a detailed study by N2 sorption and Small Angle X-ray Scattering (SAXS) of the carbonization and KOH activation of lignin for its application as active material for electrochemical energy storage. It has been observed that i) the carbonization of lignin above 700 °C leads to a hard carbon with a large amount of bulk (buried) fine structure microporosity and a good performance as Na-ion negative electrode, ii) when KOH activation is done after complete carbonization it is mainly increasing the accessibility of the initial bulk microporosity, leading to a carbon with good performance as symmetric supercapacitor in aqueous electrolyte and iii) when carbonization and KOH activation are done simultaneously, a distinct pore structure is generated with a large amount of mesopores, suitable for symmetric supercapacitor in organic electrolyte. By combining SAXS, which is sensitive to bulk as well as surface porosity, and N2 sorption which probes surface porosity, it has been possible to follow the intricate mechanism of microporosity development. Finally, it is believed that these results can be extrapolated to various biomass based precursors.

SAXS

Supercapacitors

Batteries

Carbon

Lignin

Författare

Adriana Navarro Suárez

Chalmers, Fysik, Kondenserade materiens fysik

CIC EnergiGUNE

Damien Saurel

CIC EnergiGUNE

Paula Sánchez-Fontecoba

Universidad del Pais Vasco/ Euskal Herriko Unibertsitatea

CIC EnergiGUNE

Elizabeth Castillo-Martínez

CIC EnergiGUNE

University of Cambridge

Javier Carretero-González

Instituto de Ciencia & Tecnologia de Polimeros

Teófilo Rojo

CIC EnergiGUNE

Universidad del Pais Vasco/ Euskal Herriko Unibertsitatea

Journal of Power Sources

0378-7753 (ISSN)

Vol. 397 296-306

Ämneskategorier

Oorganisk kemi

Materialkemi

Annan kemi

DOI

10.1016/j.jpowsour.2018.07.023

Mer information

Senast uppdaterat

2018-12-10