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相关概念视频

Batteries and Fuel Cells03:12

Batteries and Fuel Cells

26.9K
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...
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Electrolyte and Nonelectrolyte Solutions02:21

Electrolyte and Nonelectrolyte Solutions

62.2K
Substances that undergo either a physical or a chemical change in solution to yield ions that can conduct electricity are called electrolytes. If a substance yields ions in solution, that is, if the compound undergoes 100% dissociation, then the substance is a strong electrolyte. Complete dissociation is indicated by a single forward arrow. For example, water-soluble ionic compounds like sodium chloride dissociate into sodium cations and chloride anions in aqueous solution.
62.2K
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
Ion Exchange01:17

Ion Exchange

532
Ion exchange chromatography separates charged molecules from a solution by reversibly exchanging them with mobile, or 'active', ions associated with the oppositely charged stationary phase. This method can be used to separate ions, soften and deionize water, and purify solutions. The polymers comprising the ion-exchange column are high-molecular-weight and chemically stable polymers, crosslinked to be porous and essentially insoluble. They are also functionalized with either acidic or...
532
Ionic Bonds00:42

Ionic Bonds

117.9K
Overview
When atoms gain or lose electrons to achieve a more stable electron configuration they form ions. Ionic bonds are electrostatic attractions between ions with opposite charges. Ionic compounds are rigid and brittle when solid and may dissociate into their constituent ions in water. Covalent compounds, by contrast, remain intact unless a chemical reaction breaks them.
Opposing Charges Hold Ions Together in Ionic Compounds
Ionic bonds are reversible electrostatic interactions between ions...
117.9K
Formation of Complex Ions03:45

Formation of Complex Ions

23.2K
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...
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相关实验视频

Updated: May 30, 2025

Characterization of Electrode Materials for Lithium Ion and Sodium Ion Batteries Using Synchrotron Radiation Techniques
10:03

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

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构建离子溶解微环境,实现可持续的高压基电池.

Rui Zhou1, Yan-Song Xu1, Chong Han2

  • 1College of Chemistry, Huazhong Agricultural University, Wuhan, 430070, P. R. China.

Advanced materials (Deerfield Beach, Fla.)
|January 27, 2025
PubMed
概括

研究人员开发了一种高盐电解质,用于基于的双离子电池 (SDIB). 这项创新通过保护阴极和提高离子导电性来提高稳定性和性能,从而提高能量储存.

关键词:
阳离子溶解微环境的微环境双离子电池 双离子电池电极 - 电解质接口接口局部化的高度电解质.

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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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Elemental-sensitive Detection of the Chemistry in Batteries through Soft X-ray Absorption Spectroscopy and Resonant Inelastic X-ray Scattering
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Elemental-sensitive Detection of the Chemistry in Batteries through Soft X-ray Absorption Spectroscopy and Resonant Inelastic X-ray Scattering

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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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Elemental-sensitive Detection of the Chemistry in Batteries through Soft X-ray Absorption Spectroscopy and Resonant Inelastic X-ray Scattering
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科学领域:

  • 电化学 电化学 电化学
  • 材料科学 材料科学 材料科学
  • 储能 储能 储能 储能 储能 储能

背景情况:

  • 基于的双离子电池 (SDIB) 由于大量的和高电压,提供了有前途的能量存储.
  • 关键的挑战包括电解质分解和在高电荷状态下溶剂协同干扰,阻碍性能.
  • 开发稳定的电解质对于推进SDIB技术至关重要.

研究的目的:

  • 通过控制溶解结构,为SDIBs设计稳定的电解质.
  • 提高SDIBs的电化学稳定性和循环性能.
  • 研究离子溶解在界面化学和反应动力学中的作用.

主要方法:

  • 通过定制阳离子和阳离子的溶解结构,创建高盐度的微环境.
  • 制造一个强大的阴极-电解质介面 (CEI) 用于电极保护.
  • 电化学表征以评估循环稳定性和速率性能.

主要成果:

  • 量身定制的溶解结构保持了耐氧化的离子对和聚合物,确保了高离子导电性.
  • 强大的CEI有效地保护了石墨阴极免受氧化和溶剂协同插入.
  • SDIBs表现出极好的高压循环稳定性 (在10,000个循环后保持81%的容量) 和更好的速率性能 (97.4mAhg-1在100°C).

结论:

  • 调节离子溶解结构是实现稳定的接口化学和SDIBs增强动力学的关键.
  • 这种方法为专门的电荷存储系统设计兼容电解质提供了一条途径.
  • 这些发现为开发下一代离子储能器件提供了宝贵的见解.