INVESTIGADORES
CALVO Ernesto Julio
artículos
Título:
Electrochemical impedance spectroscopy study of the Li x Mn 2 O 4 interface with natural brine
Autor/es:
MARCHINI, FLORENCIA; WILLIAMS, FEDERICO J.; CALVO, ERNESTO J.
Revista:
JOURNAL OF ELECTROANALYTICAL CHEMISTRY - (Print)
Editorial:
ELSEVIER SCIENCE SA
Referencias:
Año: 2017
ISSN:
1572-6657
Resumen:
The LiMn2O4-Polypyrrole electrochemical cell has been shown to extract LiCl from natural brine at low voltagewith high selectivity, low energy consumption (5?10 Wh·mol−1) and good stability. The intercalation/de-intercalation of Li+ ions in LixMn2O4 (0≤x≤ 1) has been studied by electrochemical impedance spectroscopy (EIS) at different potentials and lithium ion concentrations using a modified Randles equivalent electrical circuitfor the interface of LixMn2O4 in natural brine from Salar de Olaroz (Jujuy, Argentina). The RCT exhibits two minima at potentials which correspond to x=0.25 and x= 0.75 (half filled adsorption sites) respectively and a linear lithium ion concentration dependence of (Li+)−0.5 consistent with a lithium ion transfer adsorption modelproposed by Bruce.
