In these last few years, a new chemistry has surfaced with materials able to reversibly store Li by the so-called conversion mechanism1: chemical species like transition-metal oxides, phosphides, nitrides have been found to be conversion-enabled species. In this view, Fe3O4, also known as magnetite, which is a low cost and environmentally friendly metal oxide, can undertake a reversible conversion reaction with Li+ ions, as shown in equation 1, resulting in a high theoretical specific capacity of 924 mAhg-1: Fe3O4 + 8e- + 8Li+ ↔ 3Fe0 + 4Li2O (1) Fe3O4 nanoparticles were synthesized by a modified base catalyzed method2 and tested as anode material for Li-ion batteries. The pristine oxide nanoparticles are characterized by an average size of 11 nm, detected by Transmission Electron Spectroscopy (TEM) imaging. Electrodes were prepared using high-molecular weight Poly(acrylic acid) as improved binder3 and ethanol as lower cost and environmentally friendly solvent in contrast with the industry-standard Polyvinylidene Fluoride (PVdF) binder, which requires the highly expensive and toxic N-Methyl-2-pyrrolidone (NMP) solvent. Electrochemical experiments showed high specific capacity values of 857 mAhg-1 after 200 cycles at a current density of 462 mAg-1. Fe3O4 nanoparticles cycling test – TEM imaging is shown in the figure inset 1 J. Cabana, L. Monconduit, D. Larcher, M.R. Palacín, Adv. Mater. 22 (2010) 170–192. 2 T. Fried, G. Shemer, G. Markovich, Adv. Mater. 13 (2001), 1158–1161. 3 A. Magasinski, B. Zdyrko, I. Kovalenko, B. Hertzberg, R. Burtovyy, C.F. Huebner, et al., ACS Appl. Mater. Interfaces. 2 (2010) 3004–3010.
Cycling behavior of Magnetite (Fe3O4) nanoparticles as anode for Li-ion batteries using PolyAcrylic Acid as improved binder
MARONI, FABIO;GABRIELLI, Serena;PALMIERI, Alessandro;MARCANTONI, Enrico;NOBILI, Francesco
2016-01-01
Abstract
In these last few years, a new chemistry has surfaced with materials able to reversibly store Li by the so-called conversion mechanism1: chemical species like transition-metal oxides, phosphides, nitrides have been found to be conversion-enabled species. In this view, Fe3O4, also known as magnetite, which is a low cost and environmentally friendly metal oxide, can undertake a reversible conversion reaction with Li+ ions, as shown in equation 1, resulting in a high theoretical specific capacity of 924 mAhg-1: Fe3O4 + 8e- + 8Li+ ↔ 3Fe0 + 4Li2O (1) Fe3O4 nanoparticles were synthesized by a modified base catalyzed method2 and tested as anode material for Li-ion batteries. The pristine oxide nanoparticles are characterized by an average size of 11 nm, detected by Transmission Electron Spectroscopy (TEM) imaging. Electrodes were prepared using high-molecular weight Poly(acrylic acid) as improved binder3 and ethanol as lower cost and environmentally friendly solvent in contrast with the industry-standard Polyvinylidene Fluoride (PVdF) binder, which requires the highly expensive and toxic N-Methyl-2-pyrrolidone (NMP) solvent. Electrochemical experiments showed high specific capacity values of 857 mAhg-1 after 200 cycles at a current density of 462 mAg-1. Fe3O4 nanoparticles cycling test – TEM imaging is shown in the figure inset 1 J. Cabana, L. Monconduit, D. Larcher, M.R. Palacín, Adv. Mater. 22 (2010) 170–192. 2 T. Fried, G. Shemer, G. Markovich, Adv. Mater. 13 (2001), 1158–1161. 3 A. Magasinski, B. Zdyrko, I. Kovalenko, B. Hertzberg, R. Burtovyy, C.F. Huebner, et al., ACS Appl. Mater. Interfaces. 2 (2010) 3004–3010.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
