Lithium Isotope Effects upon Electrochemical Release from Lithium Manganese Oxide
Lithium Isotope Effects upon Electrochemical Release from Lithium Manganese Oxide
复制标题
DOI：
10.1016/j.egypro.2014.11.864
复制
发表时间：
2015-05
期刊：
影响因子：
--
通讯作者：
K. Okano;Yuta Takami;S. Yanase;T. Oi
中科院分区：
文献类型：
--
作者：
K. Okano;Yuta Takami;S. Yanase;T. Oi
将锂从锰酸锂 (LiMn2O4) 中电化学释放到电解质溶液中，即含有 1 M 高氯酸锂或高氯酸钠（EC/EMC/LiClO4 或 EC/EMC/NaClO4）的碳酸亚乙酯 (EC) 和碳酸甲乙酯 (EMC) 1:2 v/v 混合溶液中，以观察伴随锂释放的锂同位素效应。较轻的锂同位素 6Li 优先分馏至电解质溶液相，25 °C 时锂同位素分离因子的值范围为 0.989 至 0.971。 LiMn2O4-EC/EMC/NaClO4体系中锂同位素分馏程度略小于LiMn2O4-EC/EMC/LiClO4体系。目前的体系与锂钴氧化物（LiCoO2）电解质溶液体系在锂同位素效应的方向和大小方面形成鲜明对比，这似乎主要归因于LiMn2O4和LiCoO2之间的结构差异。
Lithium was electrochemically released from lithium manganese oxide (LiMn2O4) to an electrolyte solution, a 1:2 v/v mixed solution of ethylene carbonate (EC) and ethylmethyl carbonate (EMC) containing 1 M lithium perchlorate or sodium perchlorate (EC/EMC/LiClO4or EC/EMC/NaClO4) to observe the lithium isotope effects that accompanied the lithium release. The lighter isotope of lithium,6Li, was preferentially fractionated to the electrolyte solution phase, with the value of the lithium isotope separation factor ranging from 0.989 to 0.971 at 25 °C. The degree of the lithium isotope fractionation was slightly smaller in the LiMn2O4-EC/EMC/NaClO4system than in the LiMn2O4-EC/EMC/LiClO4system. The present systems are in great contrast with the lithium cobalt oxide (LiCoO2)-the electrolyte solution systems concerning the direction and magnitude of the lithium isotope effects, which seems mostly ascribable to the structural difference between LiMn2O4and LiCoO2.