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Spinel LiMn2O4 was synthesized from CH3COOLi⋅2H2O, Mn(CH3COO)2 and adipic acid via sol-gel process. The crystallinity of as-prepared sample increased and its capacity also increased, while the sintering temperature increased. However, its cycleability reached a maximum value at the sintering temperature of 750 °C, over which it decreased again. The sintering duration had also influence on the capacity. The optimized performance was obtained when the sintering was carried out at 750 °C for 20 hours, where as-prepared spinel LiMn2O4 presented the initial capacity of 130 mAh g -1 and capacity retention of 96.2% at 15 th cycle.

Synthesis of Spinel LiMn2O4 for Li-Ion Batteries via Sol-gel Process