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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。
We successfully synthesized non-stoichiometric V_6O_ (13) (V_6O_ (13 + y), y <0.2) with stable phase and were characterized by X-ray powder diffraction. In the 287-428K complex impedance technique used to study it, by the impedance analysis and simulation calculations obtained phase stability of V_6O_ (13 + y) ion conductivity at different temperatures, temperature dependent ionic conductance The rate behavior follows an Arrhenus-type equation with constant activation energy E_ (?), And the activation energy of ion mobility obtained by linear least squares fitting is 27.8 kJ · mol -1. The electronic conductivity of the stable phase V_6O_ (13 + y) was also measured and its value was as high as 10 ~ (-2) S · cm ~ (-1) at room temperature. These experimental results show that the phase-stabilized V 6 O 13 (y +) is a promising and practical cathode material for room temperature non-aqueous lithium secondary batteries.