| 초록 |
LiMn2O4 and LiNiO2 have been extensively studied in order to replace LiCoO2 as cathode materials for secondary lithium batteries since its low cost. Fine crystals of LiCoO2, LiMn2O4 and LiNiO2 are generally synthesized by solid-state, sol-gel, combustion, etc. Especially, synthesis of those fine particles using supercritical water is known to be superior to the other methods in the view point of energy conservation. In this work, LiMn2O4 and LiNiO2 particles as well as LiCoO2 were synthesized under supercritical water conditions (673K and 30 MPa) using a batch reactor. LiOH and M(NO3)2 (M = Co, Mn, Ni) were chosen as starting materials. When Li/M molar ratio was stoichiometric for LiCoO2, LiMn2O4 and LiNiO2, the main products were respectively CoO, MnO2, and NiO. With increasing Li/M mole ratio, LiCoO2, LiMn2O4 and LiNiO2formed as a single phase. |
