纳米LiMn_2O_4制备及电化学性能研究

Synthesis and Electrochemical Properties of Nanostructured LiMn_2O_4 for Lithium-ion Batteries

以高能球磨后的MnO2为前躯体,用水热法成功合成了平均粒径为60nm的LiMn2O4纳米微粒。实验结果表明,所合成的纳米LiMn2O4在0.2C倍率放电条件下,首次放电比容量为122mAh/g,样品在经过20次循环后容量下降约为5%左右,表现出较好的电化学性能。

Nanostructured LiMn204 having a single crystal structure with the average grain sizes of 60 nm was synthesized with a ball-milling promoted hydrothermal reaction. The obtained samples were used as cathode materials for lithium-ion battery, the obtainable reversible capacity of the powder was 122 mAh/g at discharge rate of 0.2℃, the capacity of loss for the first 20 cycles was about 5 %, the results showed that the LiMn2O4 powders prepared by the method possess good electrochemical properties.