Room-temperature superparamagnetic greigite nanoplatelets were synthesized using 3-methyl catechol as growth moderator and phase-control agent, in the presence of sulfur, thiosulfate, octadecylamine, and Fe2+. Dense films of nanoplatelets showed ohmic behavior in the 10–300 K range. In as-deposited films the resistivity increased with decreasing temperature (as for semiconductors), while in hydrazine-treated films it decreased with decreasing temperature, as for metals. The electrochemical properties of as-prepared greigite nanoplatelets upon lithiation/de-lithiation have been followed by cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). The electrodes containing greigite nanoplatelets were found to be active in the lithiation/delithiation processes.
Charge transport and electrochemical properties of colloidal greigite (Fe3S4) nanoplatelets / Paolella, A; Chandramohan, George; Mauro, Povia; Yang, Zhang; Roman, Krahne; Marti, Gich; Alessandro, Genovese; Andrea, Falqui; Maria, Longobardi; Pablo, Guardia; Teresa, Pellegrino; Liberato, Manna. - In: CHEMISTRY OF MATERIALS. - ISSN 0897-4756. - 23:16(2011), pp. 3762-3768. [10.1021/cm201531h]
Charge transport and electrochemical properties of colloidal greigite (Fe3S4) nanoplatelets
PAOLELLA A;
2011
Abstract
Room-temperature superparamagnetic greigite nanoplatelets were synthesized using 3-methyl catechol as growth moderator and phase-control agent, in the presence of sulfur, thiosulfate, octadecylamine, and Fe2+. Dense films of nanoplatelets showed ohmic behavior in the 10–300 K range. In as-deposited films the resistivity increased with decreasing temperature (as for semiconductors), while in hydrazine-treated films it decreased with decreasing temperature, as for metals. The electrochemical properties of as-prepared greigite nanoplatelets upon lithiation/de-lithiation have been followed by cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). The electrodes containing greigite nanoplatelets were found to be active in the lithiation/delithiation processes.
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