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Orthorhombic LiMnO2 porous microspheres with the pore size of 200–500 nm were synthesised by Mn2O3 precursor and LiOH·H2O at 750°C for 5 h. Field-emitting scanning electron microscope images show the obtained products basically preserve the initial morphology of Mn2O3 precursor. The electrochemical tests of the as-obtained LiMnO2 presented the maximum discharge capacity of 163 mAh/g at the 11th cycle, and remained above 143 mAh/g after 30 cycles at a current density of 30 mA/g, corresponding to a capacity fading of ∼12.1%. For comparative purpose, the LiMnO2 nanoparticles prepared with the Li2CO3 substituted for LiOH·H2O as the lithium source were studied, which showed their maximum discharge capacity was only 153 mAh/g, together with a capacity of 136 mAh/g after 30 cycles at the same current density.
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