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给出了阻抗谱法确定扩散系数的理论和方法;以钒酸盐阴极材料Na_(1+x)V_3O_(?)(L.T.)为例,应用本方法计算给出了Li~+在阴极中的扩散系数为10~(?)-10~(-9)cm~2·s~(-1);最后还对误差来源进行了讨论.To have a quantitative estimate of the speed of Li+ diffusion in Nal+xV3O8 (L-T.), for example, impedance tests were run for different intercalation levels. The values of 10-8-10-9 cm2·s-1 have been obtained and matched the fast kinetics observed.Possible







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