Synthesis of Orthorhombic LiMnO2 as a High Capacity Cathode for Li-Ion Battery by Emulsion Drying Method

Abstract

Abstract Orthorhombic LiMnO2 was readily synthesized by calcination of an emulsion-dried powder precursor. The optimum synthesis condition to crystallize into zigzag layered β-NaMnO2 system was to calcine at 925 °C for 12 h in an Ar atmosphere. According to TEM observation, the prepared material from the emulsion-dried precursor consisted of highly ordered single crystalline particle. Li/LiMnO2 cell showed the capacity of about 173 mAh (g-oxide)−1 and excellent capacity retention upon cycling with help of cycle-induced spinel like phase, more than 155 mAh g−1 over 300 cycles at 25 °C.