caa a22 4500 606195491 CHVBK 20210128100919.0 cr unu---uuuuu 210128e20150801xx s 000 0 eng 10.1007/s10934-015-9972-2 doi (NATIONALLICENCE)springer-10.1007/s10934-015-9972-2 Infested ash trees as a carbon source for supercapacitor electrodes [Elektronische Daten] [Lia Kouchachvili, Nicola Maffei, Evgueniy Entchev] Infested ash tree residues were carbonized at 600, 700 and 900°C. The carbonization product—biochar (BC) was investigated as a potential active material for supercapacitor electrodes in its original (o-BC) and activated (a-BC) forms. The electrodes were formed with o-BC or a-BC and a water based composite binder. The correlation between the physical properties of BC and electrochemical properties of these electrodes were carefully investigated in H2SO4 and aqueous LiN(SO2CF3)2 electrolytes. The results obtained from cyclic voltammetry, electrochemical impedance spectrometry and charge/discharge measurements showed approximately a tenfold increase in the capacitance of the electrodes with the a-BC. Further analysis of the BC samples identified functional groups on the carbon surface of the a-BC which could be responsible for such a dramatic increase in the performance of the electrodes. The highest specific capacitances of 470Fg−1 in 0.75M H2SO4 and 335Fg−1 in 3M LiN(SO2CF3)2 were achieved. The cycle life of electrodes with a-BC in LiN(SO2CF3)2 electrolyte is stable and shows a very insignificant decrease in capacitive performance after 1500 cycles. These results indicate that the BC derived from infested ash trees is a promising material for use in supercapacitor electrodes. Her Majesty the Queen in Right of Canada as represented by the Minister of Natural Resources, 2015 Porous biochar nationallicence Aqueous electrolytes nationallicence Composite binder nationallicence bis(trifluoromethanesulfone) imide nationallicence Specific capacitance nationallicence Activated carbon nationallicence Kouchachvili Lia Natural Resources Canada, CanmetENERGY-Ottawa, 1 Haanel Drive, K1A 1M1, Ottawa, ON, Canada aut Maffei Nicola Natural Resources Canada, CanmetENERGY-Ottawa, 1 Haanel Drive, K1A 1M1, Ottawa, ON, Canada aut Entchev Evgueniy Natural Resources Canada, CanmetENERGY-Ottawa, 1 Haanel Drive, K1A 1M1, Ottawa, ON, Canada aut Journal of Porous Materials Springer US; http://www.springer-ny.com 22/4(2015-08-01), 979-988 1380-2224 22:4<979 2015 22 10934 https://doi.org/10.1007/s10934-015-9972-2 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s10934-015-9972-2 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Kouchachvili Lia Natural Resources Canada, CanmetENERGY-Ottawa, 1 Haanel Drive, K1A 1M1, Ottawa, ON, Canada aut NATIONALLICENCE 700 1- Maffei Nicola Natural Resources Canada, CanmetENERGY-Ottawa, 1 Haanel Drive, K1A 1M1, Ottawa, ON, Canada aut NATIONALLICENCE 700 1- Entchev Evgueniy Natural Resources Canada, CanmetENERGY-Ottawa, 1 Haanel Drive, K1A 1M1, Ottawa, ON, Canada aut NATIONALLICENCE 773 0- Journal of Porous Materials Springer US; http://www.springer-ny.com 22/4(2015-08-01), 979-988 1380-2224 22:4<979 2015 22 10934