Potassium-ion aqueous supercapattery composed by solar carbon and nickel-zinc prussian blue analogue
Por:
Lobato-Peralta D.R., Vazquez-Samperio, Juvencio, Perez, Obed, Acevedo-Pena, Prospero, Reguera, Edilso, Cuentas-Gallegos A.K.
Publicada:
1 ene 2020
Resumen:
Hybrid energy storage devices, currently known as supercapatteries, combine electrodes with two different energy storage mechanisms, double-layer and fast-kinetics faradaic processes, to deliver high specific energy at high specific power. Here, an eco-friendly synthetic route is employed to obtain negative (solar carbon) electrode, and a soft–chemistry route to synthesize positive (nickel-zinc hexacyanoferrate) electrode, to assemble a K-ion aqueous supercapattery. Activated carbon was synthesized by pyrolysis of agro-industrial waste composed by agave angustifolia leaves in a solar furnace, and mixed nickel-zinc hexacyanoferrate was prepared by simple chemical precipitation. Conventional three-electrode characterization of active materials showed that both materials exhibit similar rate capability and charge storage capacities. A supercapattery was obtained when combining these two electrodes, delivering specific energies of 9.163 W h kg-1 and 6.444 W h kg-1 at specific power values of 0.153 kW kg-1 and 5.638 kW kg-1, respectively. The assembled K-ion energy storage device retained 85% of the initial capacitance after 5000 cycles (at 2.5 Ag-1), with a coulombic efficiency close to 100%. © 2020
Filiaciones:
Lobato-Peralta D.R.:
Instituto de Energías Renovables, Universidad Nacional Autónoma de México, Priv. Xochicalco s/n, Col. Centro, Temixco, Morelos CP 62580, Mexico
Vazquez-Samperio, Juvencio:
Instituto Politécnico Nacional, Laboratorio Nacional de Conversión y Almacenamiento de Energía, CICATA-Legaria, Calzada Legaria 694, Col. Irrigación11500 CDMX, Mexico
Inst Politecn Nacl, Lab Nacl Convers & Almacenamiento Energia, CICATA Legaria, Calzada Legaria 694, Cdmx 11500, Mexico
Perez, Obed:
Instituto Politécnico Nacional, Laboratorio Nacional de Conversión y Almacenamiento de Energía, CICATA-Legaria, Calzada Legaria 694, Col. Irrigación11500 CDMX, Mexico
Inst Politecn Nacl, Lab Nacl Convers & Almacenamiento Energia, CICATA Legaria, Calzada Legaria 694, Cdmx 11500, Mexico
Acevedo-Pena, Prospero:
CONACYT-Instituto Politécnico Nacional, CICATA Legaria, Calzada Legaria 694, Col. Irrigación, CDMX., 11500, Mexico
Inst Politecn Nacl, CONACYT, CICATA Legaria, Calzada Legaria 694, Cdmx 11500, Mexico
Reguera, Edilso:
Instituto Politécnico Nacional, Laboratorio Nacional de Conversión y Almacenamiento de Energía, CICATA-Legaria, Calzada Legaria 694, Col. Irrigación11500 CDMX, Mexico
Inst Politecn Nacl, Lab Nacl Convers & Almacenamiento Energia, CICATA Legaria, Calzada Legaria 694, Cdmx 11500, Mexico
Cuentas-Gallegos A.K.:
Instituto de Energías Renovables, Universidad Nacional Autónoma de México, Priv. Xochicalco s/n, Col. Centro, Temixco, Morelos CP 62580, Mexico
Univ Nacl Autonoma Mexico, Inst Energias Renovables, Priv Xochicalco S-N, Temixco 62580, Morelos, Mexico
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