Universidad Juárez Autónoma de Tabasco (UJAT), División Académica de Ingeniería y Arquitectura (DAIA). Posgrado en Ciencias en Ingeniería (PCI); Cunduacán, Tabasco, México
Abstract
El carbón activado (CA) se elaboró a partir de desechos de granos de café, el cual se preparó por activación química, usando como agente activante hidróxido de potasio (KOH) a 2 M, con tiempos de impregnación de 24 y 48 h, temperaturas de carbonización de 600 y 700 °C, una vez obtenidas las muestras de carbón activado se doparon con óxido de níquel (NiO), con la finalidad de modificar las propiedades del CA, posteriormente se caracterizaron (adsorción física de N2, FT-IR, DRX). Los compositos de CA/NiO se prepararon por el método químico y se compactaron electrodos en formas de pastillas autoconsistentes, las cuales fueron colocadas en una celda de dos electrodos utilizando como electrolito ácido sulfúrico (H2SO4) a 2 M. Se evaluó la parte electroquímica mediante voltametría cíclica y cronopotenciometría galvanostática, obteniendo el comportamiento de los electrodos para su aplicación en supercapacitores (SCS). Finalmente se determinó la capacitancia específica de los SCSa partir de CA/NiO, como resultado se obtuvo que las muestras de CA/NiO-48-700°C-KOH, mostro una capacitancia máxima de: 405.405 F/g respectivamente. Esto comprueba que el óxido de níquel mejoró las propiedades del CA para su uso como electrodos en supercapacitores.
Keywords
dopaje,carbón activado,granos de café,supercapacitores,capacitancia específica
How to Cite
del Ángel-Meraz, E., & Pérez-Aguirre, A. (2020). Supercondensadores para el almacenamiento de energía a partir de residuos de granos de café. Renewable Energy, Biomass & Sustainability, 2(2), 7–15. https://doi.org/10.56845/rebs.v2i2.23
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