TY - JOUR
T1 - Double-layer capacitance of waste coffee ground activated carbons in an organic electrolyte
AU - Rufford, Thomas
AU - Hulicova-Jurcakova, D.
AU - Fiset, E.
AU - Zhu, Z.H.
AU - Lu, G.Q.
PY - 2009
Y1 - 2009
N2 - Using ZnCl2 activation we prepared a series of carbon electrodes from waste coffee grounds to study the effect of mesopores on double-layer capacitance in a tetraethyl ammonium tetrafluoroborate/acetonitrile electrolyte. The activated carbon with the largest mesopore volume achieved an energy density of 34 Wh kg(-1) at low current loads, and significantly retained an energy density of 16.5 Wh kg(-1) and specific capacitance of more than 100 F g(-1) at fast charge-discharge rates (20 A g(-1)). The effect of mesopores on capacitance at fast charge-discharge rates is discussed. (C) 2009 Elsevier B.V. All rights reserved.
AB - Using ZnCl2 activation we prepared a series of carbon electrodes from waste coffee grounds to study the effect of mesopores on double-layer capacitance in a tetraethyl ammonium tetrafluoroborate/acetonitrile electrolyte. The activated carbon with the largest mesopore volume achieved an energy density of 34 Wh kg(-1) at low current loads, and significantly retained an energy density of 16.5 Wh kg(-1) and specific capacitance of more than 100 F g(-1) at fast charge-discharge rates (20 A g(-1)). The effect of mesopores on capacitance at fast charge-discharge rates is discussed. (C) 2009 Elsevier B.V. All rights reserved.
U2 - 10.1016/j.elecom.2009.02.038
DO - 10.1016/j.elecom.2009.02.038
M3 - Article
VL - 11
SP - 974
EP - 977
JO - Electrochemistry Communications
JF - Electrochemistry Communications
SN - 1388-2481
IS - 5
ER -