Lithium isotope effects accompanying oxidation reactions in lithium ion secondary batteries

锂离子二次电池中伴随氧化反应的锂同位素效应

• 批准号: 23561015
• 负责人: OI Takao
• 金额: $ 3.49万
• 依托单位: Sophia University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2011
• 资助国家: 日本
• 起止时间: 2011 至 2013
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-23561015/
• 关键词: リチウム同位体効果; リチウムイオン二次電池; コバルト酸リチウム; マンガン酸リチウム; 周期境界条件法; 換算分配関数比; 分子軌道計算; 二重収束型質量分析計; 量子化学計算; リチウム同位体分離

In the electrochemical lithium release from a lithium cobalt oxide (LiCoO2) cathode to ethylene carbonate-based organic electrolyte solution containing lithium ions, it was observed that the heavier isotope, 7Li, was preferentially transferred to the electrolyte solution. Contrary to this, no lithium isotope effects were observed when the electrolyte solution contained no lithium ions. It was induced that the kind of electrolyte solution controlled the attainment of the lithium isotope exchange equilibrium between the cathode and the electrolyte solution.When lithium manganese oxide (LiMn2O4) was used as the cathode material, the lighter isotope of lithium, 6Li, was preferentially released to the electrolyte phase, irrespective of the kind of electrolyte solution. The great contrast in lithium isotope effects between LiCoO2 and LiMn2O4 cathodes seemed mostly ascribable to the structural difference between the two cathode materials.

在从钴酸锂 (LiCoO2) 阴极向含有锂离子的碳酸亚乙酯基有机电解质溶液进行电化学锂释放时，观察到较重的同位素 7Li 优先转移到电解质溶液中。与此相反，当电解质溶液不含锂离子时，没有观察到锂同位素效应。结果表明，电解质溶液的种类控制着正极和电解质溶液之间锂同位素交换平衡的实现。当使用锰酸锂（LiMn2O4）作为正极材料时，无论电解质溶液的种类如何，较轻的锂同位素6Li都会优先释放到电解质相中。 LiCoO2和LiMn2O4正极之间锂同位素效应的巨大差异似乎主要归因于两种正极材料之间的结构差异。

项目成果

リチウムイオン二次電池正極材における電気化学的酸化に伴うリチウム同位体効果

锂离子二次电池正极材料中与电化学氧化相关的锂同位素效应

• 发表时间: 2014
• 作者: 岡野耕史;高見勇太;柳瀬聡;大井隆夫
• 通讯作者: 大井隆夫

Observation of lithium isotope effects accompanying electrochemical release from lithium cobalt oxide

钴酸锂电化学释放过程中锂同位素效应的观察

• DOI: 10.5560/zna.2012-0122
• 发表时间: 2013
• 期刊: Z. Naturforsch. A
• 作者: Yuta Takami;Satoshi Yanase;Takao Oi
• 通讯作者: Takao Oi

マンガン酸リチウム正極における電気化学的リチウム放出に伴う同位体効果

与锰酸锂正极电化学锂释放相关的同位素效应

• 发表时间: 2013
• 作者: 岡野耕史;高見勇太;柳瀬聡;野村雅夫;大井隆夫
• 通讯作者: 大井隆夫

Lithium Isotope Effects upon Electrochemical Release from Lithium Manganese Oxide

• DOI: 10.1016/j.egypro.2014.11.864
• 发表时间: 2015-05
• 期刊: Energy Procedia
• 作者: K. Okano;Yuta Takami;S. Yanase;T. Oi

Lithium isotope effects upon electrochemical release from lithium cobalt oxide to non-lithium electrolyte solution

锂同位素对钴酸锂向非锂电解质溶液电化学释放的影响

• DOI: 10.5560/zna.2013-0080
• 发表时间: 2014
• 期刊: Z. Naturforsch. A
• 作者: Yuta Takami;Satoshi Yanase;Takao Oi
• 通讯作者: Takao Oi