相关实验视频

Updated: Jul 3, 2025

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

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

Published on: December 20, 2016

CaI₂和LiI对基于溶液合成的Li₇P₃S₁₁固体电解质的离子导电性的协同作用

Tran Anh Tu^1,2,3, Tran Viet Toan^1,2, Luu Tuan Anh^1,2

¹Faculty of Materials Technology, Ho Chi Minh City University of Technology (HCMUT) 268 Ly Thuong Kiet Str., Dist. 10 Ho Chi Minh City Vietnam nhhphuc@hcmut.edu.vn.

|February 16, 2024

概括

兴奋剂Li7P3S11固体电解质与CaX2和LiI增强的离子导电性. 90Li7P3S11-5CaI2-5LiI样本获得了3.1 mS cm-1,对于固态电池来说是有前途的.

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:

固体电解质对于下一代电池至关重要.
改善固体电解质中的离子导电性是一个关键的挑战.
7P3S11是一种有前途的硫化物固体电解质材料.

研究的目的:

为了合成和表征CaX2 (X = Cl, Br, I) 和LiI合Li7P3S11固体电解质.
为了研究这些杂电解质的结构和电化学特性.
为了提高Li7P3S11的离子导电性,用于全固态离子电池应用.

主要方法:

液相合成使用乙尼.
通过X射线衍射 (XRD),拉曼光谱和扫描电子显微镜与能量分散式X射线光谱 (SEM-EDS) 进行结构分析.
使用复杂的阻抗光谱来确定离子导电性和放松动态的电化学表征.

主要成果:

CaX2和LiI成功地被纳入Li7P3S11结构和谷物边界.
拉曼光谱证实,CaI2兴奋剂改变了PS4(3-) 和P2S7(4-) 离子的振动.
90Li7P3S11-5CaI2-5LiI样本在25°C时表现出3.1mS cm-1的高离子导电性.
在粉末样本中,EDS证实了CaI2和LiI的良好分散.

结论:

与CaX2和LiI合Li7P3S11有效地提高了离子导电性.
增强的离子运动在粒边界和结构修改有助于提高导电性.
这些杂固体电解质显示出在全固态离子电池中使用的巨大潜力.

更多相关视频

1,3,5-Triphenylbenzene and Corannulene as Electron Receptors for Lithium Solvated Electron Solutions

1,3,5-Triphenylbenzene and Corannulene as Electron Receptors for Lithium Solvated Electron Solutions

Published on: October 10, 2016

Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications

Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications

Published on: August 12, 2013

相关概念视频

Ionic Strength: Effects on Chemical Equilibria

Ionic Strength: Effects on Chemical Equilibria

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...

Formation of Complex Ions

Formation of Complex Ions

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...

Common Ion Effect

Common Ion Effect

Compared with pure water, the solubility of an ionic compound is less in aqueous solutions containing a common ion (one also produced by dissolution of the ionic compound). This is an example of a phenomenon known as the common ion effect, which is a consequence of the law of mass action that may be explained using Le Châtelier’s principle. Consider the dissolution of silver iodide:

Ionic Crystal Structures

Ionic Crystal Structures

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...

Factors Affecting Solubility

Factors Affecting Solubility

Compared with pure water, the solubility of an ionic compound is less in aqueous solutions containing a common ion (one also produced by dissolution of the ionic compound). This is an example of a phenomenon known as the common ion effect, which is a consequence of the law of mass action that may be explained using Le Chȃtelier’s principle. Consider the dissolution of silver iodide:

Ionic Strength: Overview

Ionic Strength: Overview

The ionic strength of a solution is a quantitative way of expressing the total electrolyte concentration of a solution. This concept was first introduced in 1921 by two American physical chemists, Gilbert N. Lewis and Merle Randall, while describing the activity coefficient of strong electrolytes. During the calculation of ionic strength (I or μ), all the cations and anions are considered. However, the concentration (c) of an ion with a greater charge number (z) has a greater contribution...