排序方式: 共有2条查询结果,搜索用时 15 毫秒
1
1.
我们成功地合成了物相稳定的非化学计量的V_6O_(13)(V_6O_(13+y),y<0.2),并用X射线粉末衍射法进行了鉴定。在287-428K之间用复数阻抗技术对其进行了研究,由阻抗分析和模拟计算得出了物相稳定的V_6O_(13+y)在不同温度下的离子电导率,依赖于温度的离子电导率行为服从一个有恒定活化能E_(?)的Arrhenus型方程,由线性最小二乘拟合得出的离子迁移活化能为27.8kJ·mol~(-1)。还测定了物相稳定的V_6O_(13+y)的电子电导率,其数值在室温下高达10~(-2)S·cm~(-1)数量级。这些实验结果表明,对于室温非水二次锂电池来说,物相稳定的V_6O_(13+y)是一种有前途和实用价值的阴极材料。 相似文献
2.
Ionic conductivity values for segmented polyether polyurethaneurea (PEUU) complexes with LiClO_4 were determined and values as high as~1.1×10~(-4) S·cm~(-1) at 353K and~1.0×10~(-5)S·cm~(-1) at 306K were achieved. The ionic conductivity data were analyzed using the VTF (Vogel-Tamman-Fulcher) equation and WLF (Williams-Landel-Ferry) type equation. Values have been estimated for the "apparent" activation energies of ion transport from VTF equation and they lie in the range 2.70—5.53 kJ·mol~(-1). 相似文献
1