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相关概念视频

Ionic Strength: Effects on Chemical Equilibria01:19

Ionic Strength: Effects on Chemical Equilibria

1.3K
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...
1.3K
Ionic Bonding and Electron Transfer02:48

Ionic Bonding and Electron Transfer

40.2K
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. 
40.2K
Aqueous Solutions and Heats of Hydration02:42

Aqueous Solutions and Heats of Hydration

14.2K
Water and other polar molecules are attracted to ions. The electrostatic attraction between an ion and a molecule with a dipole is called an ion-dipole attraction. These attractions play an important role in the dissolution of ionic compounds in water.
When ionic compounds dissolve in water, the ions in the solid separate and disperse uniformly throughout the solution because water molecules surround and solvate the ions, reducing the strong electrostatic forces between them. This process...
14.2K
Colloidal precipitates01:09

Colloidal precipitates

470
The high insolubility of some precipitates can result in an unfavorable relative supersaturation. This can lead to colloidal particles with a large surface-to-mass ratio, where adsorption is promoted. For instance, in the precipitation of silver chloride, silver ions are adsorbed on the surface of the colloidal particles, forming a primary layer. This layer attracts ions of opposite charge (such as nitrate ions), forming a diffuse secondary layer of adsorbed ions. This electric double layer...
470
Formation of Complex Ions03:45

Formation of Complex Ions

23.1K
A type of Lewis acid-base chemistry involves the formation of a complex ion (or a coordination complex) comprising a central atom, typically a transition metal cation, surrounded by ions or molecules called ligands. These ligands can be neutral molecules like H2O or NH3, or ions such as CN− or OH−. Often, the ligands act as Lewis bases, donating a pair of electrons to the central atom. These types of Lewis acid-base reactions are examples of a broad subdiscipline called coordination...
23.1K
Intermolecular Forces03:13

Intermolecular Forces

56.6K
Atoms and molecules interact through bonds (or forces): intramolecular and intermolecular. The forces are electrostatic as they arise from interactions (attractive or repulsive) between charged species (permanent, partial, or temporary charges) and exist with varying strengths between ions, polar, nonpolar, and neutral molecules. The different types of intermolecular forces are ion–dipole, dipole–dipole, hydrogen bonds, and dispersion; among these, dipole–dipole, hydrogen...
56.6K

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相关实验视频

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Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications
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Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications

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悬浮酸基电解质:用于互奖励接口优化策略的静电相互作用.

Wenjing Zhang1,2,3,4, Zhenguo Zhang1,2,4, Hongtao Zhang1,2,4

  • 1Hebei Engineering Research Center of Advanced Energy Storage Technology and Equipment, School of Energy and Environmental Engineering, Hebei University of Technology, Tianjin, 300401, China.

Advanced science (Weinheim, Baden-Wurttemberg, Germany)
|March 20, 2025
PubMed
概括

一种新的悬浮电解质策略均分散酸颗粒,增强金属电池的稳定性和性能在广泛的温度下. 这种方法稳定了电极-电解质接口,提高了安全性和能量密度.

关键词:
界面优化 界面优化 界面优化金属电池是金属电池的一种.悬浮电解质电解质的悬浮温度范围广泛的温度范围.

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Characterization of Electrode Materials for Lithium Ion and Sodium Ion Batteries Using Synchrotron Radiation Techniques
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Synthesis of Ionic Liquid Based Electrolytes, Assembly of Li-ion Batteries, and Measurements of Performance at High Temperature
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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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Synthesis of Ionic Liquid Based Electrolytes, Assembly of Li-ion Batteries, and Measurements of Performance at High Temperature
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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:

  • 稳定的电极-电解质接口 (EEI) 对高能金属电池至关重要.
  • 酸 (LiNO3) 是一个有前途的牺牲添加剂,但在/酸电解质中溶解性差.
  • NO3的有限用途阻碍了安全和高性能金属电池的开发.

研究的目的:

  • 开发一种新的悬浮电解质策略,用于分散LiNO3颗粒.
  • 在金属电池中稳定电极-电解质接口.
  • 为了提高电池性能,安全性和适用于广泛的温度范围.

主要方法:

  • 提出了一种悬浮电解质策略,将LiNO3颗粒分散在一个/烯混合电解质中.
  • 研究了悬浮LiNO3颗粒的双重功能,用于界面稳定和Li+运输.
  • 在各种温度 (60°C和-10°C) 和高电压 (4.5V) 下,评估了 Liidiye NCM523 电池的电化学性能.

主要成果:

  • 悬浮电解质均分散了LiNO3,提高了电极电解质兼容性和Li+溶解.
  • 在现场形成的富含LiNxOy的EEI加速了Li+运输动力学,抑制了寄生虫反应,并提高了速度性能.
  • 优化的电解质能够稳定循环100个周期,在60°C保持90.05%的容量,在-10°C稳定低温运行.

结论:

  • 悬浮电解质策略有效地克服了 LiNO3 在 Ester/Nitrile 电解质中的可溶性限制.
  • 这种双重战略的方法,结合了广泛的温度配方和接口工程,显著提高了金属电池的性能.
  • 开发的技术为实现高特异能,安全和广泛应用的金属电池提供了一条途径.