7Li NMR and related studies in LISICON system
7Li NMR and related studies in LISICON system
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7Li NMR及LISICON系统的相关研究
DOI：
10.1016/0025-5408(83)90175-7
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发表时间：
1983
影响因子：
5.4
通讯作者：
M. Bose
中科院分区：
文献类型：
--
作者：
D. Mazumdar;D. N. Bose;L. Mukherjee;A. Basu;M. Bose
在209 ~ 398 K温度范围内对多晶固体电解质Li_（14）Zn（GeO_4）_4和Li_（12）Zn_2（GeO_4）_4（LISICON系统）进行了~ 7 Li NMR研究。Li 14 Zn（GeO 4）4和Li 12 Zn 2（GeO 4）4的NMR谱线在230 K和240 K时开始变窄，并且随着温度的升高而变窄。计算的活化能分别为0.19 eV和0.17 eV。电导率随温度的变化定性类似于NMR线宽，但活化能分别为0.60 eV和0.47 eV的高得多。差异的可能原因进行了讨论。电导率、差热分析、热重分析、核磁共振氢谱和核磁共振氢谱研究表明，水分在阻碍Li+离子运动中起着重要作用。
7Li NMR studies in the polycrystalline solid electrolytes Li14Zn(GeO4)4and Li12Zn2(GeO4)4(LISICON System) have been carried out in the temperature range 209 K to 398 K. Onset of NMR line narrowing was observed at 230 K for Li14Zn(GeO4)4and at 240 K for Li12Zn2(GeO4)4and became appreciable with increasing temperature in both the cases. Activation energies calculated were 0.19 eV and 0.17 eV respectively. The conductivity variation with temperature was qualitatively similar to that of the NMR linewidth but the activation energies of 0.60 eV and 0.47 eV respectively obtained were much higher. Possible reasons for the difference are discussed. Conductivity, DTA, TGA and1H and7Li NMR studies on unsealed samples show the important role played by moisture in blocking the motion of Li+ions in these compounds.