Abstract: Layered sodium manganese bronze NaMnO₂ with a monoclinic structure has been synthesized in air. Its structure is similar to the bronze synthesized in argon. The precursor was used to prepare layered LiMnO₂ by ion exchange of Na⁺ by Li⁺ under different ion exchange conditions: in a LiCl/LiNO₃ eutectic at 300 ℃, in n-hexanol at 145 ℃, in water at 105 ℃, and in ethanol at 95 ℃. X-ray diffraction indicates that the precursor and ion exchange products have a layered structure with the monoclinic space group C2/m. Both XRD and ICP analysis demonstrate that temperature influences the rate of the ion exchange reaction and the crystal structure of LiMnO₂ in each case. The higher the temperature, the faster the reaction, and the more severe the distortion of the products. SEM micrographs show that LiMnO₂ possesses a needle-like morphology.

Key words: Layered material, Ion exchange, LiMnO₂