Effects of lattice defects on cathode properties of LiMn2O4 synthesized at low temperatures were
investigated. LiMn2O4 powders were synthesized by a sol-gel method. The specific capacities of
LiMn2O4 decreased from 134 to 81 mAh g-1 with decreasing heating temperature from 750 to 200°C.
X-ray absorption spectroscopy showed that a large amount of lattice defects such as cation
vacancies existed and cation mixing occurred in LiMn2O4 calcined at low temperatures. It was
found that the low specific capacities of LiMn2O4 calcined at low temperatures were attributed to
these lattice defects.