作 者: ; ; ; ; (帕斯夸利); (皮斯托亚); (解思深);
机构地区: 中国科学院物理研究所
出 处: 《物理学报》 1995年第12期1964-1968,共5页
摘 要: 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 sources of error calculating D from impedance data were entailed and discussed.