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相关概念视频

Ionic Bonding and Electron Transfer02:48

Ionic Bonding and Electron Transfer

41.3K
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. 
41.3K
Ionic Crystal Structures02:42

Ionic Crystal Structures

14.2K
Ionic crystals consist of two or more different kinds of ions that usually have different sizes. The packing of these ions into a crystal structure is more complex than the packing of metal atoms that are the same size.
Most monatomic ions behave as charged spheres, and their attraction for ions of opposite charge is the same in every direction. Consequently, stable structures for ionic compounds result (1) when ions of one charge are surrounded by as many ions as possible of the opposite...
14.2K
Ionic Strength: Effects on Chemical Equilibria01:19

Ionic Strength: Effects on Chemical Equilibria

1.4K
The addition of an inert ionic compound increases the solubility of a sparingly soluble salt. For example, adding potassium nitrate to a saturated solution of calcium sulfate significantly enhances the solubility of calcium sulfate. Le Châtelier's principle cannot predict this shift in the equilibrium. Instead, this could be explained in terms of changes in the effective concentration of the ions in solution in the presence of added inert salt.
In this solution, the primary...
1.4K
Trends in Lattice Energy: Ion Size and Charge02:54

Trends in Lattice Energy: Ion Size and Charge

23.8K
An ionic compound is stable because of the electrostatic attraction between its positive and negative ions. The lattice energy of a compound is a measure of the strength of this attraction. The lattice energy (ΔHlattice) of an ionic compound is defined as the energy required to separate one mole of the solid into its component gaseous ions. For the ionic solid sodium chloride, the lattice energy is the enthalpy change of the process:
23.8K
Electrodeposition01:08

Electrodeposition

616
Electrodeposition is a technique used to separate an analyte from interferents by electrochemical processes. Here, the analyte is a metal ion that can be deposited on an electrode immersed in the sample solution. The electrochemical setup consists of an anode and a cathode. When an electric current is applied to the setup, oxidation occurs at the anode. At the cathode, which consists of a large metal surface, metal ions undergo reduction and deposit onto the surface.
Electrodeposition can...
616

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相关实验视频

Updated: Jun 18, 2025

In Situ Neutron Powder Diffraction Using Custom-made Lithium-ion Batteries
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In Situ Neutron Powder Diffraction Using Custom-made Lithium-ion Batteries

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在分层的离子氧化物阴极中通过层次层次修改稳定层间排斥.

Xiangsi Liu1,2,3, Chen Yuan1,2,3, Xingyu Zheng1,2,3

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

Advanced materials (Deerfield Beach, Fla.)
|August 1, 2024
PubMed
概括

层次层次修改通过减轻O2-O2排斥来稳定分层的离子氧化物阴极. 这一战略提高了先进的离子电池的结构完整性和电化学性能.

关键词:
静电排斥 静电排斥是一种电静电排斥.层次层次层次的修改修改.层层的氧化物阴极是层层的氧化物阴极.阶段转换 阶段转换离子电池是一种离子电池.

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Characterization of Electrode Materials for Lithium Ion and Sodium Ion Batteries Using Synchrotron Radiation Techniques
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Characterization of Electrode Materials for Lithium Ion and Sodium Ion Batteries Using Synchrotron Radiation Techniques

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Atomically Defined Templates for Epitaxial Growth of Complex Oxide Thin Films
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Atomically Defined Templates for Epitaxial Growth of Complex Oxide Thin Films

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相关实验视频

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Characterization of Electrode Materials for Lithium Ion and Sodium Ion Batteries Using Synchrotron Radiation Techniques
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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
  • 储能 储能 储能 储能 储能 储能

背景情况:

  • 层层的离子氧化物对高性能离子电池具有前景.
  • 充电过程中的相位转换是由O2-O2排斥引起的,导致性能下降.
  • 稳定层间排斥对于改善电池寿命至关重要.

研究的目的:

  • 为稳定分层的离子氧化物阴极制定层次层次修改策略.
  • 在提取过程中减轻O2-O2-排斥.
  • 为了提高离子电池阴极的结构稳定性和电化学性能.

主要方法:

  • 提出了一种涉及Li+迁移和Ca2+定的等级层修改策略.
  • 包含用来代替部分氧气.
  • 研究了兴奋剂元素 (Li,Ca,F) 之间的相互作用及其对结构稳定的影响.

主要成果:

  • 修改后的阴极 (Na0.61Ca0.05[Li0.1Ni0.23Mn0.67]O1.95F0.05,NCLNMOF) 在广泛的电压范围内保留了纯P2型结构.
  • 在1000个循环后实现了82.5%的容量保留.
  • 在1600 mA g-1下展示了94 mAh g-1的高速率能力.

结论:

  • 层次层次的修改有效地抑制了O2-O2排斥,增强了结构稳定性.
  • NCLNMOF阴极表现出极好的循环稳定性和速率能力.
  • 这一战略为开发用于离子电池的高性能分层氧化物阴极提供了一个有前途的途径.