Electrochemical impedance spectroscopy study of the LixMn2O4 interface with natural brine

The LiMn2O4-Polypyrrole electrochemical cell has been shown to extract LiCl from natural brine at low voltage with 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...

Descripción completa

Guardado en:
Detalles Bibliográficos
Publicado: 2018
Materias:
Brine
Extraction
Impedance
LiMn2O4
Lithium
Brines
Chlorine compounds
Electric impedance
Electrochemical impedance spectroscopy
Energy utilization
Ions
Manganese compounds
Polypyrroles
Spectroscopy
Adsorption model
Adsorption site
Equivalent electrical circuits
Good stability
High selectivity
Lithium-ion transfer
Low energy consumption
Lithium compounds
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_15726657_v819_n_p428_Marchini
http://hdl.handle.net/20.500.12110/paper_15726657_v819_n_p428_Marchini
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
Descripción
Sumario:The LiMn2O4-Polypyrrole electrochemical cell has been shown to extract LiCl from natural brine at low voltage with 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 circuit for 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 model proposed by Bruce. © 2017 Elsevier B.V.

Ejemplares similares