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.

在从锂钴氧化物（LiCoO2）阴极向含有锂离子的碳酸乙烯酯基有机电解质溶液的电化学锂释放中，观察到较重的同位素7Li优先转移到电解质溶液。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锂离子电池正极与电解质溶液之间锂同位素交换平衡的实现，当锂锰氧化物（LiMn2O4）用作正极材料时，较轻的锂同位素6Li优先释放到电解质相中，而与电解质溶液的种类无关。LiCoO_2和LiMn_2O_4正极材料在锂同位素效应方面的巨大差异可能主要归因于两种正极材料的结构差异。

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