相关实验视频
Updated: Jul 12, 2025

08:43
Molten-Salt Synthesis of Complex Metal Oxide Nanoparticles
Published on: October 27, 2018
18.1K
过度静态度的离子失序岩盐的超静态度转稳定
You Wang1, Alexandra Outka1, Wassie Mersha Takele1
1Department of Chemistry and Chemical Biology, University of New Mexico, Albuquerque, NM, 87131, USA.
Advanced materials (Deerfield Beach, Fla.)
|October 31, 2023
概括
引入超静态度将稳定的基于的无序岩盐 (DRXs) 转化为转移稳定的形式. 这提高了先进的离子电池的氧化还原活性和可逆性.
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:
- 阴离子失序岩盐 (DRXs) 为无Ni和无Co的高能量密度离子电池提供了潜力.
- 电化学性质DRXs受阴离子分布的影响,不太重视热力学稳定性.
- 超稳定性和超静态度的DRX是电池材料优化的未经探索的途径.
研究的目的:
- 开发一种可通用的方法,将热力学稳定的基于Mn的DRX稳定到变态稳定的形式.
- 调查过度静态度对DRX电化学性能和储能机制的影响.
- 为了区分稳定和超稳定DRX状态之间的电化学特征.
主要方法:
- 基于Mn的DRXs的合成与受控的Li超静电测量.
- 电化学表征包括循环,速率能力和阻抗光谱.
- 结构分析以确认稳定阶段和超稳定阶段之间的转变.
主要成果:
- 建立了一个使用Li过度静脉测量来"转稳定"稳定的基于Mn的DRX的一般方法.
- 转稳定的DRX表现出增强的氧化还原活性和改善离子间隙/脱间隙的可逆性.
- 将转移的DRX恢复到稳定的形式,恢复了原来的电化学特性,突出了每个状态的独特性质.
结论:
- 李超静电测量提供了一种途径,通过访问元稳定状态来调整DRX阴极属性.
- 这项工作扩大了对DRX结构和组成多样性的理解.
- 这些发现为设计用于离子电池的高性能DRX阴极材料提供了新的策略.
更多相关视频
相关概念视频
Ionic Strength: Effects on Chemical Equilibria
1.5K
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...
In this solution, the primary...
1.5K
Complexation Equilibria: Factors Influencing Stability of Complexes
382
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...
382
Complexation Equilibria: Overview
719
Complexation reactions take place when dative or coordinate covalent bonds form between metal ions and ligands. The compounds formed in these reactions are called coordination compounds. The number of bonds formed between the metal ion and the ligands is called its coordination number. Generally, most metal ions in an aqueous solution are solvated by water molecules and thus exist as aqua complexes.
The equilibrium constant of the complexation reaction is represented as the formation constant...
The equilibrium constant of the complexation reaction is represented as the formation constant...
719
Solubility Equilibria: Overview
694
When a substance such as sodium chloride is added to water, it dissolves, forming an aqueous solution. The extent of dissolution is called solubility. The process of dissolution can exist in equilibrium, just like other chemical processes. Solubility equilibria are also called precipitation equilibria because the process of solubility can be reversible. The reverse of the solubility process is called precipitation.
Solubility is important in biological and environmental processes. A notable...
Solubility is important in biological and environmental processes. A notable...
694
Qualitative Analysis
22.4K
For solutions containing mixtures of different cations, the identity of each cation can be determined by qualitative analysis. This technique involves a series of selective precipitations with different chemical reagents, each reaction producing a characteristic precipitate for a specific group of cations. Metal ions within a group are further separated by varying the pH, heating the mixture to redissolve a precipitate, or adding other reagents to form complex ions.
For instance, group IV...
For instance, group IV...
22.4K
Formation of Complex Ions
23.7K
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...
23.7K

