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Updated: Apr 18, 2026

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Construction and Testing of Coin Cells of Lithium Ion Batteries
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在和丰富的离子电池阴极中,重新进入的局部环境和由缺陷驱动的电化学
Fulya Dogan1, Brandon R Long, Jason R Croy
1Chemical Sciences and Engineering Division, ‡Materials Sciences Division, and §X-ray Science Division, Advanced Photon Source, Argonne National Laboratory , Argonne, Illinois 60439, United States.
Journal of the American Chemical Society
|January 31, 2015
概括
通过使用 (6) Li 魔法角度旋转的 NMR 来研究富含和的层状氧化物,揭示了依赖路径的位占用. 这种结构洞察力解释了电化学歇斯底里和过渡金属迁移在二次电池中的影响.
科学领域:
- 材料科学 材料科学 材料科学
- 电化学 电化学 电化学
- 固态化学 固态化学
背景情况:
- 了解结构电化学活性关系对于二次电池开发至关重要.
- 描述当地的环境是优化接材料的关键.
- (6) Li MAS NMR 是用于亚纳米尺度结构分析的独特工具.
研究的目的:
- 为了研究活性化和丰富的过渡金属氧化物复杂的电化学行为.
- 在循环过程中将结构重组与电化学歇斯底里相关联.
- 识别和描述特定的位和它们在电池性能中的作用.
主要方法:
- 使用 (6) Li 魔力角旋转 (MAS) 核磁共振 (NMR) 光谱学.
- 分析离子 (Li-ion) 间隔电极,其组成为0.5(6) Li2MnO3·0.5(6) LiMn(0.5) Ni(0.5) O2.
- 观察的插入和提取过程.
主要成果:
- 观察到依赖路径的位占用直接证据.
- 确定了新的 (6) Li NMR共振在~1600 ppm,分配给LiMn6-TM(tet) 位点.
- 可逆的TM迁移,由TM层位的损失表明,在循环时受到限制.
结论:
- 结构重组和依赖路径的占用与电化学歇斯底里直接相关.
- 重新进入的四面体过渡金属 (TMs) 影响部位占用和电化学行为.
- 即使是稀释的缺陷点也会显著影响离子介质材料的整体电化学性能.
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