Orthorhombic-LiMnO2, spinel-type Li1.6Mn1.6O4, and spine! MnO2 center dot 0.5H(2)O were synthesized via a combination of hydrothermal synthesis and solid-phase reaction. o-LiMnO2 with different stacking fault concentrations were synthesized by controlled hydrothermal reaction using a KMnO4, MnCl2 and LiOH mixed solution. Spinel-type Li1,6Mn1.6O4 precursor was prepared via heat treatment of o-LiMnO2. The effects of hydrothermal and solid-phase reaction on the structure and ion-exchange properties were examined with powder X-ray diffraction, scanning electron microscopy, and Li+ selective adsorption measurements. The results showed that stacking fault concentration of o-LiMnO2 affects the adsorption properties of Li1.6Mn1.5O4. Li+ adsorption capacity reached 6.06 mmol.g(-1) at equilibrium. Distribution coefficients of metal ions were in the order Li+ >> Na+ > Mg2+ > K > Ca2+ and were significant for Li+ extraction from low grade brine. The equilibrium uptake of Li+ from salt lake brine remained at 3.62 mmol.g(-1) after six cycles.