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相关概念视频

Ionic Crystal Structures02:42

Ionic Crystal Structures

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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...
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Ionic Bonds00:42

Ionic Bonds

128.7K
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...
128.7K
Electrolyte and Nonelectrolyte Solutions02:21

Electrolyte and Nonelectrolyte Solutions

71.1K
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.
71.1K
Electrolysis03:00

Electrolysis

30.2K
In a galvanic cell, the electrical work is done by a redox system on its surroundings as electrons produced by the spontaneous redox reactions are transferred through an external circuit. Alternatively, an external circuit does work on a redox system by imposing a voltage sufficient to drive an otherwise nonspontaneous reaction in a process known as electrolysis. For instance, recharging a battery involves the use of an external power source to drive the spontaneous (discharge) cell reaction in...
30.2K
Ionic Strength: Effects on Chemical Equilibria01:19

Ionic Strength: Effects on Chemical Equilibria

2.5K
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...
2.5K
Ionic Bonding and Electron Transfer02:48

Ionic Bonding and Electron Transfer

48.7K
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. 
48.7K

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Molten-Salt Synthesis of Complex Metal Oxide Nanoparticles
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一种氧化固体电解质,具有优越的离子导电性.

Hongyang Shan1, Yanming Cui2, Wei Xue1

  • 1College of Aerospace Engineering, Chongqing University, Chongqing 400044, China.

Inorganic chemistry
|September 17, 2025
PubMed
概括

研究人员开发了全固态电池的新型离子氧化固体电解质. 这些材料具有高离子导电性,为更安全,高性能的储能解决方案铺平了道路.

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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:

  • 全固态电池 (ASSSB) 与离子电池相比,提供了更高的安全性和成本效益.
  • 离子固体电解质 (SE) 对ASSSB至关重要,但在离子导电性方面往往落后于离子SE.
  • 开发高性能SE是释放离子电池技术潜力的关键.

研究的目的:

  • 为了合成和描述新的离子氧化固体电解质.
  • 调查新的SEs的离子导电性和结构性质.
  • 评估这些SE在全固态电池中的性能.

主要方法:

  • 使用NaTaO3.3.x使用Na3xTaO3xCl5-3x组成的Na-离子氧化SE的合成.
  • 测量室温离子导电性和激活能量.
  • 使用X射线光电子光谱 (XPS) 和X射线吸收光谱 (XAS) 进行表征.
  • 使用开发的SE.使用ASSSB的电化学测试.

主要成果:

  • 实现了高室温离子导电率为2.6mS cm-1.1.
  • 确定了Na+离子运输的0.26 eV的低激活能量.
  • 通过XPS和XAS确认了氧结合环境和局部Na+协调.
  • 在全固态-电池中证明了可逆的充放电循环.

结论:

  • 新型的离子氧化SE表现出优异的离子导电性和低的激活能量.
  • 协同作用的结构特征促进了有效的Na+迁移,这对电池性能至关重要.
  • 这些材料代表了高性能和安全的全固态电池的有希望的进步.