Ordered Mesoporous Spinel LiMn2O4 by a Soft-Chemical Process as a Cathode Material for Lithium-Ion Batteries

Well-ordered mesoporous spinel-structured LiMn 2 O 4 has been successfully prepared by annealing the lithiated mesoporous MnO 2 at a low temperature of 350 °C, in which the lithiated MnO 2 was obtained by the chemical lithiation of LiI with mesoporous MnO 2 . Both low-temperature heat treatment and chemical lithiation processes could preserve the mesoporous structure of MnO 2 . The ordered mesoporous LiMn 2 O 4 shows high rate capability and excellent cycling ability as a cathode for lithium-ion batteries: it maintains 94% of its initial capacity after 500 cycles and keeps 80% of its reversible capacity at 0.1 C rate, even at 5 C rate.