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通过水热合成的方法,在合成V_6O_(13)的过程中加入适量的MnSO_4,以达到在V_6O_(13)中掺杂Mn离子来改性的目的。通过各种表征手段分析不同掺杂量对样品的物相、前驱体的形貌、Mn离子的掺杂率以及对样品的官能团的影响。对不同样品的充放电循环测试后发现,当Mn/V比为1/50时可以提高锂离子电池的容量保存率。循环伏安曲线结果表明Mn离子的掺入可以降低锂离子脱嵌所造成的V_6O_(13)结构的破化程度,从而提高锂离子电池的电化学性能。
Hydrothermal synthesis method, in the synthesis of V_6O_ (13) during the process by adding an appropriate amount of MnSO_4 in order to achieve the V_6O_ (13) doped Mn ions for the purpose of modification. Various characterization methods were used to analyze the phase, morphology of precursor, doping rate of Mn ions and the effect on the functional groups of the samples. After charging and discharging cycle tests on different samples, it was found that when the Mn / V ratio is 1/50, the capacity preservation rate of the lithium ion battery can be improved. The results of cyclic voltammetry show that the incorporation of Mn ions can reduce the rupture of V_6O_ (13) structure caused by deionization of lithium ions, and improve the electrochemical performance of lithium ion batteries.