Li extraction from high Mg/Li ratio brine with LiFePO4/FePO4 as electrode materials

Highly Selective and Pollution‐Free Electrochemical Extraction of Lithium by a Polyaniline/LixMn2O4 Cell

“…first reported a selective electrochemical extraction of Li + ions from a Pt/λ‐MnO 2 cell, in which Li + ions can selectively insert into a spinel λ‐MnO 2 electrode with oxygen and hydrogen on a Pt electrode . In recent years, a number of studies have been conducted on the selective extraction of Li + ions from a Li x FePO 4 electrode; however, the co‐insertion of Na + and Mg 2+ ions into the FePO 4 lattice remains a problem for its practical application. Very recently, several research groups reported highly efficient electrochemical recovery of Li + ions through the use of a λ‐MnO 2 positive electrode and a chloride‐capturing negative electrode (such as Ag and Zn) .…”

Lithium recovery from brine using a λ-MnO2/activated carbon hybrid supercapacitor system

“…The dissolution of silver could be an important problem because of the high solubility of Ag 2 SO 4 (Velický et al, 2012;Pasta et al, 2012b) under the presence of considerable amount of SO 4 2À in the brine lakes which is major source of the lithium. Then, the applications of the rocking chair battery (LiFePO 4 /FePO 4 ) with high Mg/Li recovery ratio was proposed by Zhao et al (2013) and the new concept aqueous battery with mixed-ion electrolytes as lithium/sodium ion recovery and energy storage were investigated by Chen et al (2013). Herein, we propose a silver-free electrochemical method for lithium recovery based on a k-MnO 2 /activated carbon hybrid supercapacitor system.…”

Research status in preparation of FePO4: a review

“…The iron sources for preparation of lithium iron phosphate can be divided into trivalent iron sources [18][19][20][21][22][23][24] and divalent iron sources [25,26]. Divalent iron sources are expensive and easily oxidized.…”