用体积分数为10%的H2O2和V2O5反应得到的V2O5*nH2O湿凝胶,与Li2CO3反应得LiV3O8沉淀,经400 ℃焙烧后得LiV3O8产品. 与传统的高温固相反应相比,合成方法温度较低、产品粒度较细. 前驱体和产品用热分析法、X射线衍射法、元素分析技术进行表征. 采用恒电流充放电法、循环伏安法、交流阻抗技术对样品进行电化学性能测试;利用平面电极的半无限扩散阻抗模型,计算锂在活性材料LiV3O8中的化学扩散系数DLi. 结果表明,活性材料LiV3O8在0.1C的放电倍率和3.6～1.8 V的电压范围内具有较高的放电容量,循环20次后仍保持有225 mA*h/g的放电比容量;化学扩散系数DLi的变化范围为1×10-8～1×10-11 cm2/s,数量级.
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