Li_2O～SiO_2～RE_2O_3(RE=Y,La,Nd)体系的锂快离子导体

Li_2O～SiO_2～RE_2O_3 (RE=Y, La, Nd) Lithium Fast Ion Conductor System

快离子导体的组成决定了它的性能,为提高离子电导率可在硅酸锂体系快离子导体中加入稀土元素等第三组分。运用混料均匀设计方法,在Li2O～SiO2～RE2O3(RE=Y,La,Nd)三元体系中,设计了一系列均匀试验点,用高温固相法合成了快离子导体。继而通过对实验数据的多元回归分析,以离子电导率为评价标准,找出三元体系中离子电导率最好的区域,其中选取的验证点的实测值与预测值相当。这说明均匀设计法可用于快离子导体研究。实验中所得的快离子导体室温电导率最高为LSLa:1.15×10-6S·cm-1。

Performance of fast ion conductor depends on its component. In the interest of higher ion conductivity the rare earth oxide was added into the system of Li_2O～SiO_2. In Li_2O～SiO_2～RE_2O_3 (RE=Y, La, Nd) system, a set of the optimal ratio of starting materials Li_2O∶SiO_2∶RE_2O_3 was designed by Uniform Design and the high temperature solid state reaction was used to. According to the ion conductivity, the experiment data were analyzed by polynomial regression. The result is match the estimate value. The Uniform Design is proved to be useful in the fast ion conductor research. The highest ambient ion conductivity is LSLa: 1.15×10^(-6) S·cm^(-1) for the above rare earth lithium fast ion conductors system.