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相关概念视频

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
Batteries and Fuel Cells03:12

Batteries and Fuel Cells

27.3K
A battery is a galvanic cell that is used as a source of electrical power for specific applications. Modern batteries exist in a multitude of forms to accommodate various applications, from tiny button batteries such as those that power wristwatches to the very large batteries used to supply backup energy to municipal power grids. Some batteries are designed for single-use applications and cannot be recharged (primary cells), while others are based on conveniently reversible cell reactions that...
27.3K
Formation of Complex Ions03:45

Formation of Complex Ions

23.6K
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...
23.6K
Complexation Equilibria: Factors Influencing Stability of Complexes01:09

Complexation Equilibria: Factors Influencing Stability of Complexes

366
In complexation reactions, metal cations are the electron pair acceptors, and the ligands are the electron pair donors. The stability of the metal complexes depends primarily on the complexing ability of the central metal ion and the nature of the ligands. Generally, the complexing ability of the metal ion depends on the size and charge of the ion. As the metal ion size increases, the stability of the metal complexes decreases, provided that the valency of the metal ion and the ligands remain...
366
Voltaic/Galvanic Cells02:47

Voltaic/Galvanic Cells

57.1K
Spontaneous Chemical Reactions
Spontaneous redox reactions occur abundantly in nature. The chemical reaction occurring in a disposable AA battery powering our remote controls is one such example of a spontaneous redox reaction. Another example is the immersion of coiled copper wire into an aqueous silver nitrate solution. The reaction shows a gradual, visually impressive color change from colorless to bright blue and the formation of a grey precipitate on the copper wire. In this experiment,...
57.1K
Ionic Bonding and Electron Transfer02:48

Ionic Bonding and Electron Transfer

41.4K
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. 
41.4K

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相关实验视频

Updated: Jun 25, 2025

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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协同的双添加电解质使金属电池具有高度稳定的性能.

Phung M L Le1,2, Thanh D Vo1,3, Kha M Le1

  • 1Energy and Environment Directorate, Pacific Northwest National Laboratory, Richland, WA, 99354, USA.

Small (Weinheim an der Bergstrasse, Germany)
|May 25, 2024
PubMed
概括
此摘要是机器生成的。

双重添加剂硫 (Sul) 和乙烯碳酸盐 (VC) 显著提高金属电池 (SMB) 的稳定性. 这一突破阻止了树的生长,并延长了大规模储能应用的周期寿命.

关键词:
电解质添加剂的电解质添加剂高速的骑自行车运动.金属电池 金属电池固体电解质相间阶段溶解结构是一个溶解结构.

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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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Synthesis of Ionic Liquid Based Electrolytes, Assembly of Li-ion Batteries, and Measurements of Performance at High Temperature

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Extending the Lifespan of Soluble Lead Flow Batteries with a Sodium Acetate Additive
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Extending the Lifespan of Soluble Lead Flow Batteries with a Sodium Acetate Additive

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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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Extending the Lifespan of Soluble Lead Flow Batteries with a Sodium Acetate Additive
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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:

  • 金属电池 (SMB) 具有较高的理论容量和丰富的资源,使其成为大规模能源存储的前景.
  • 电解质稳定性有限和树成长仍然是阻碍中小企业商业化的重大挑战.

研究的目的:

  • 确定有效的电解质添加剂,以稳定中小企业的碳酸 (PC) 电解质.
  • 通过防止树形成和增强接口特性,提高中小企业的循环稳定性和寿命.

主要方法:

  • 研究了硫 (Sul) 和乙烯碳酸盐 (VC) 作为用于中小企业的PC电解质中的双添加剂的使用.
  • 在高循环速率下评估了Na/NaNi0.68Mn0.22Co0.1O2 (NaNMC) 电池与双添加剂电解质的电化学性能.
  • 在阳极和阴极上分析了固体电解质介相 (SEI) 组成和形态.

主要成果:

  • 双添加电解质显著提高了循环稳定性,在5°C (750 mA g-1) 的600个循环中实现了94%的容量保留.
  • 库伦比效率 (CE) 达到99.9%,表明副作用最小,离子运输效率高.
  • 一个均的,密集的,薄的混合SEI层,富含F-和S-含有的物种,形成在电极表面,促进离子运输和防止电解质耗尽.

结论:

  • 硫和乙烯碳酸盐作为有效的双添加剂,对稳定PC电解质在中小企业至关重要.
  • 形成一个保护性的混合SEI层是SMB的卓越循环性能和延长寿命的关键.
  • 这种电解质设计具有很大的潜力,可以提高高速金属电池的性能和实际应用.