【摘要】 通过十六烷基三甲基溴化铵（CTAB）辅助二次水热法合成了o-LiMnO₂微米棒。首先以KMnO₄和CTAB为原料合成了γ-MnOOH微米棒,然后再以γ-MnOOH为前驱物在LiOH溶液中通过第2步水热反应制备出表面粗糙的o-LiMnO₂微米棒。实验结果表明:当第2步水热反应温度为200℃、时间为15 h、n（Li）∶n（Mn）=12∶1时所得样品的电化学性能最优。该样品在电流密度为30、200 mA·h·g^-1时最大放电容量分别达到220、117 mA·h·g^-1,且经过40次循环后放电容量仍高达176、112 mA·h·g^-1,表现出较好的循环稳定性和倍率性能。更多还原

【Abstract】 o-LiMnO₂ microrods were prepared by a CTAB assisted two-step hydrothermal route. In the first step γ-MnOOH microrods were prepared using KMnO₄ and CTAB as raw materials. And then γ-MnOOH microrods were hydrothermal treatment with the LiOH solution to produce the o-LiMnO₂ microrods with rough surfaces. The result showed that the sample which was secondly heated at 200 ℃ for 15 h and n（ Li） ∶n（ Mn） = 12∶1 displayed a good electrochemistry performance. At the current density of 30 mA·h·g^-1and 200 mA·h·g^-1,the sample demonstrated the maximum discharge capacity of 220 mA·h·g^-1and 117 mA·h·g^-1,respectively.After 40 cycles,the sample still delivered a high capacity of 176 mA·h·g^-1and 112 mA·h·g^-1with a better cycling and rate performance.更多还原