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首页> 外文期刊>The journal of physical chemistry, B. Condensed matter, materials, surfaces, interfaces & biophysical >Electrochemical Lithium Insertion for Perovskite Oxides of Li_yLa_((1-y)/3)NbO_3
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Electrochemical Lithium Insertion for Perovskite Oxides of Li_yLa_((1-y)/3)NbO_3

机译：Li_yLa _（（1-y）/ 3）NbO_3钙钛矿氧化物的电化学锂嵌入

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摘要

The relationship between crystal structure and electrochemical behavior through the lithium insertion in the perovskite oxides, Li_yLa((1-y)/3)NbO_3 (y = 0, 0.1, 0.25), has been investigated. The results of the relationship between the amount of inserted lithium and the number of vacancies reveal that Li~+ ions insert into the vacancies at an A-site. Furthermore, observed cell potential diagrams indicate that the Li~+ insertion reaction occurs stepwise, since there are two kinds of vacancy sites due to the ordering arrangement of cations in the A-site. With increasing the composition y, the extinction of electrochemical behavior due to such stepwise reaction was observed, which is attributed to the disordering of cation arrangement. Simple Coulombic calculation of electrochemical lithium insertion also supports the observed electrochemical behavior and determines the insertion step to the two kinds of vacancy sites.
机译：研究了通过锂嵌入钙钛矿氧化物Li_yLa（（1-y）/ 3）NbO_3（y = 0，0.1，0.25）中的晶体结构与电化学行为之间的关系。锂的插入量与空位数之间的关系的结果表明，Li〜+离子在A位插入到空位中。此外，观察到的细胞电势图表明，由于A位中阳离子的有序排列，由于存在两种空位，因此Li +插入反应是逐步发生的。随着组成y的增加，观察到由于这种逐步反应而导致的电化学行为的消失，这归因于阳离子排列的无序。电化学锂插入的简单库仑计算也支持观察到的电化学行为，并确定了两种空位的插入步骤。

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