Synthesis and electrochemical properties of Li_0.33MnO ₂ nanorods as positive electrode material for 3 V lithium batteries

In this study, one-dimensional Li_0.33MnO₂ nanorods were synthesized by a solid state reaction using γ-MnO₂ as a precursor. γ-MnO₂ was prepared under different reaction times by a redox process. The HR-TEM results showed that the diameter and length of the Li_0.33MnO₂ nanorods are 5-20 nm and about 200 nm, respectively. The Li_0.33MnO₂ nanorods delivered a discharge capacity of 157 mA h g^-1 at 1 C, and retained 97% of their initial capacity over 30 cycles. Good rate performance was also observed, with discharge capacities of 201 and 133 mA h g^-1 at 0.1 C and 2 C, respectively. The morphology of the nanorods could increase their electrochemical properties, resulting in higher capacity and rate performance.