Production of nanoarchitectonics corncob activated carbon as electrode material for enhanced supercapacitor performance
Por:
Ortiz-Olivares, Rich David, Lobato-Peralta, Diego Ramon, Arias, D. M., Okolie, Jude A., Cuentas-Gallegos, Ana Karina, Sebastian, P. J., Mayer, Adriana Reyes, Okoye, Patrick U.
Publicada:
1 nov 2022
Resumen:
Corncob was utilized as a low-grade and abundant material for the
production of activated carbon through impregnation with potassium
carbonate (K2CO3) at different ratios (1:1 to 1:3). The impregnated
samples were activated at different temperatures (500 degrees C to 800
degrees C) and activated carbons were used to fabricate electrodes for
energy storage. The results revealed that increasing activation
temperature and K2CO3 tailored the surface area (489-884 m2/g),
morphological, and topography of the activated carbon to propagate
higher energy storage via a predominantly electric double layer (EDL)
mechanism. The capacitive performance of the materials obtained at
different temperatures is in the order of 650 degrees C > 500 degrees C
> 800 degrees C. In 3-electrode cells, a specific capacitance of 325 F/g
was reached at a 5 mV/s scan rate. The energy retention and columbic
efficiency after 10,000 charge/ discharge cycles were maintained at 88
% and 100 %, respectively. The corncob activated carbon material
presented specific energy of 9.9 Wh/kg at 0.25 A/g, which is higher than
many reported studies on activated carbon supercapacitors under similar
conditions.
Filiaciones:
Universidad Tecnológica Emiliano Zapata del Estado de Morelos, Av. Universidad Tecnológica, Col. Palo Escrito, Emiliano ZapataMorelos 62765, Mexico
Laboratorio de Bioenergía, Instituto de Energías Renovables (IER-UNAM), Privada Xochicalco S/n, Col. Centro, Temixco, Morelos 62580, Mexico
St. Peter's College, Muenster, SK, Canada
Centro de Nanociencias y Nanotecnología, Universidad Nacional Autónoma de México, Km. 107 Carretera Tijuana-Ensenada, Ensenada, B.C. C.P. 22800, Mexico
Univ Tecnol Emiliano Zapata Estado Morelos, Ave Univ Tecnol, Emiliano Zapata 62765, Morelos, Mexico
Inst Energias Renovables IER UNAM, Lab Bioenergia, Privada Xochicalco S-N, Temixco 62580, Morelos, Mexico
St Peters Coll, Muenster, SK, Canada
Univ Nacl Autonoma Mexico, Ctr Nanociencias & Nanotecnol, Km 107 Carretera Tijuana Ensenada, Ensenada 22800, BC, Mexico
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