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采用Sol-gel技术及溶剂替换工艺,以工业V2O5粉末为原料,通过过氧化法在常压下制备出新型纳米结构V10O24.12H2O材料,对其结构和交流阻抗特性进行了研究。结果表明,V10O24.12H2O材料同时存在V5+和V4+,具有层状结构,呈非晶态。提出样品电极的等效电路并进行拟合,拟合值与实验值较吻合。系统分析了相关参数的物理意义及引起参数变化的可能原因,结果表明,电池内阻较小,有利于大电流放电。该制备方法操作简单、反应条件温和且原料价格便宜;V10O24.12H2O材料良好的电化学特性将有可能成为理想的新能源材料。
A new type of nanostructured V10O24.12H2O was prepared at atmospheric pressure by using V2O5 powder as raw material by using Sol-gel technology and solvent replacement process. The structure and the AC impedance characteristics were studied. The results show that the V10O24.12H2O material has both V5 + and V4 +, has a layered structure and is amorphous. The equivalent circuit of the sample electrode is proposed and fitted, and the fitted value is in good agreement with the experimental value. The physical meaning of the related parameters and the possible causes of the parameter changes are systematically analyzed. The results show that the battery internal resistance is small, which is conducive to large current discharge. The preparation method has the advantages of simple operation, mild reaction conditions and cheap raw materials; the good electrochemical property of the V10O24.12H2O material may become an ideal new energy material.