| 电池正极材料中Li+运动特性的7Li NMR研究 |
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| 引用本文： | 任海兰,严宏伟.电池正极材料中Li+运动特性的7Li NMR研究[J].波谱学杂志,1998,15(5):427-430. |
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| 作者姓名： | 任海兰 严宏伟 |
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| 作者单位： | 1. 中国科学院武汉物理与数学研究所波谱与原子分子物理国家重点实验室, 武汉 430071;2. 中国科学院物理研究所, 北京 100080 |
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| 基金项目： | 国家自然科学基金资助项目 |
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| 摘 要： | 利用变温7LiNMR实验对Li-电池正极材料LiMn2O4和LiCoO2中Li+的运动特性进行了研究,结果表明,随实验温度的提高,LiMn2O4的7LiNMR谱线窄化,表明其中Li+迁移能力增加,而LiCoO2的谱线无变化.此外随温度提高,LiMn2O4的7Li的T1变短,而LiCoO2的T1变长,产生这种不同变化趋势的原因在于LiMn2O4和LiCoO2晶相结构的差异造成其中Li+迁移能力的差别,它们各自的相关时间τc使7Li核的T1分别位于T1-τc曲线极小点两侧.
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| 关 键 词： | 7Li NMR 电池材料 离子运动 |
| 收稿时间： | 1998-04-20 |
7Li NMR STUDY OF Li+ MOTION IN ANODE MATERIALS OF BATTERY |
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| Ren Hailan,Yue Yong,Chen Congju,Ye Chaohui,Yan Hongwei.7Li NMR STUDY OF Li+ MOTION IN ANODE MATERIALS OF BATTERY[J].Chinese Journal of Magnetic Resonance,1998,15(5):427-430. |
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| Authors: | Ren Hailan Yue Yong Chen Congju Ye Chaohui Yan Hongwei |
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| Institution: | 1. State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, The Chinese Academy of Sciences, Wuhan 4300710;2. Institute of Physics, The Chinese Academy of Sciences, Beijing 100080 |
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| Abstract: | The motion of Li+ ions in anode materials of battery has been investigated by temperature varying 7Li solid-state NMR techniques.The results suggest that with the increase of experimental temperature, the 7Li NMR spectra of LiMn2O4 become narrowed, which indicate the increase of mobility of Li+, while those of LiCoO2 remain unchanged.The changes of T1 in LiMn2O4 and LiCoO2 show opposite tendency with the increase of temperature because their T1's locate on different sides of the utmost point of the T1-τc curve. |
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| Keywords: | 7Li NMR Battery materials Ionic motion |
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