| 物相稳定的V6O13+y |
| PHASE-STABLE V6O13+y |
| 作者 | 单位 | | 魏元训 | 南京大学化学系, 大气科学系, 南京 210008 | | 莫天麟 | 南京大学化学系, 大气科学系, 南京 210008 | | 徐炜政 | 南京大学化学系, 大气科学系, 南京 210008 | | 张锡辉 | 南京大学化学系, 大气科学系, 南京 210008 | | 徐洁 | 南京大学化学系, 大气科学系, 南京 210008 | | 顾庆超 | 南京大学化学系, 大气科学系, 南京 210008 |
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| 摘要: 我们成功地合成了物相稳定的非化学计量的V6O13(V6O13+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V6O13+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Ea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V6O13+y的电子电导率,其数值在室温下高达10-2S·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V6O13+y是一种有前途和实用价值的阴极材料。 |
关键词: 非化学计量的V6O13 物相稳定性 电导率 锂蓄电池 |
| 基金项目: |
| Abstract: The phase-stable nonstoichiometric V6O13(V6O13+y, y<0.2) has been prepared successfully and investigated by X-ray powder diffraction. The compound was studied by means of complex impedance techniques in temperature range 287 ~ 428K. The ionic conductivities of the phase-stable V6O13+y at different temperature were obtained by impedance analysis and the simulation calculation. The behavior of temperature-dependent conductivity of the phase-stable V6O13+y obeys an Arrhenius equation with a constant activation energy Ea. The Ea value of ion transport from a linear-squares fit is 27.8 kJ·mol-1 fit Electrical conductivity value for the phase-stable V6O13+y was also determined and value as high as 10-2S·cm-1 order of magnitude at room temperature. The results show that phase-stable V6O13+y is a practical and promising cathode material for ambient temperature nbnaqueous secondary lithium cells. |
| Keywords: nonstoichiometric V6O13+y phase stability conductivity secondary lithium battery |
| 投稿时间：1989-09-30 |
| 摘要点击次数: 1301 |
| 全文下载次数: 1338 |
| 魏元训,莫天麟,徐炜政,张锡辉,徐洁,顾庆超.物相稳定的V6O13+y[J].无机化学学报,1992,8(1):33-37. |
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