Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6661815 | Journal of Electroanalytical Chemistry | 2018 | 32 Pages |
Abstract
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·molâ 1) and good stability. The intercalation/de-intercalation of Li+ ions in LixMn2O4 (0 â¤Â x â¤Â 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+)â 0.5 consistent with a lithium ion transfer adsorption model proposed by Bruce.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Chemical Engineering (General)
Authors
Florencia Marchini, Federico J. Williams, Ernesto J. Calvo,