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相关概念视频

Induced Electric Dipoles01:28

Induced Electric Dipoles

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A permanent electric dipole orients itself along an external electric field. This rotation can be quantified by defining the potential energy because the external torque does work in rotating it. Then, the potential energy is minimum at the parallel configuration and maximum at the antiparallel configuration. While the former is a stable equilibrium, the latter is an unstable equilibrium.
Since the absolute value of potential energy holds no physical meaning, its zero value can be chosen as per...
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Ionic Bonding and Electron Transfer02:48

Ionic Bonding and Electron Transfer

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Ions are atoms or molecules bearing an electrical charge. A cation (a positive ion) forms when a neutral atom loses one or more electrons from its valence shell, and an anion (a negative ion) forms when a neutral atom gains one or more electrons in its valence shell. Compounds composed of ions are called ionic compounds (or salts), and their constituent ions are held together by ionic bonds: electrostatic forces of attraction between oppositely charged cations and anions. 
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相关实验视频

Updated: Sep 18, 2025

Characterization of Electrode Materials for Lithium Ion and Sodium Ion Batteries Using Synchrotron Radiation Techniques
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一个动态的结构稳定策略,用于-酸离子电池阴极.

Bizhu Zheng1,2,3, Hui Qian1,2,3, Jiabao Ding1,2,3

  • 1Research Center for Industries of the Future, Westlake University, Hangzhou 310030, Zhejiang, China.

ACS applied materials & interfaces
|June 25, 2025
PubMed
概括

将离子添加到离子电池的电解质中,可以防止在循环过程中从阴极中丢失. 这一策略增强了结构稳定性,并改善了分层氧化物阴极的容量保留.

关键词:
原子局部环境 原子局部环境晶体结构 晶体结构电解质的修改是电解质的修改.层层的氧化物阴极是层层的氧化物阴极.离子电池 离子电池

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相关实验视频

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10:03

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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:

  • 离子电池中的分层氧化物面临着诸如相位转换和低容量的挑战.
  • 兴奋剂可以提高性能,但在骑自行车时受到脱的影响.

研究的目的:

  • 开发一种方法,以防止离子电池循环期间从分层氧化物阴极中流失.
  • 为了提高离子电池的长期稳定性和性能.

主要方法:

  • 在电解质中引入外源离子.
  • 固态核磁共振 (NMR) 和X射线衍射 (XRD) 用于结构分析.
  • 接口表征和电化学性能测试.

主要成果:

  • 外源离子有效地弥补了来自正极的损失.
  • 保持散装含量和防止结构退化 (远程和局部).
  • 优化了阴极-电解质接口,降低了接口阻抗,并在200个周期内将容量保留率从73.5%提高到90.7%.

结论:

  • 电解质工程对于保持阴极结构修改的有效性至关重要.
  • 外源离子提供了一种可行的策略,可以延长高性能离子电池的循环寿命.