関連する実験動画
Updated: Aug 16, 2025
05:33
Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications
Published on: August 12, 2013
21.8K
イオン伝導性を高める高エントロピーメカニズム
Yan Zeng1, Bin Ouyang1,2,3, Jue Liu4
1Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA.
Science (New York, N.Y.)
|December 22, 2022
まとめ
高エントロピー材料は,先進電池の固体電解質のイオン伝導性を著しく高めます. 固体電池の合成能力を向上させ 固体電池の特定の化学成分への依存を軽減します
科学分野:
- 材料科学
- 電気化学
- 固体電池
背景:
- 固体電池は安全性と性能を向上させるために効率的な固体電解質を必要とします.
- 固体電解質技術の進歩の鍵となるものです.
研究 の 目的:
- 固体電解質のイオン伝導性に対する高エントロピー金属カチオン混合物の影響を調査する.
- 高エントロピー設計により,合成能力の向上と化学特異性の低下を証明する.
主な方法:
- 超イオン導体構造に高エントロピー金属カチオンを組み込む.
- 改造されたLi-NASICON,Na-NASICON,Li-garnetの材料におけるイオン伝導性の実験的検証
- 局所的な歪みとアルカリイオン浸透経路の分析
主要な成果:
- 高いエントロピーはイオン伝導率の 大きさのオーダーを増加させます
- リチウム (Li) -ナトリウム (Na) 超イオン伝導体 (Li-NASICON),Na-NASICON,およびLi-ガーネット構造で強化されたイオン伝導性が観察されました.
- 局所的な歪みは,低活性化エネルギーのアルカリイオンへの浸透を促進します.
結論:
- 高エントロピー工学は優れた固体電解質を設計するための有望な戦略です.
- このアプローチは,従来の固体電解質化学の限界を克服する道を提供します.
- 新しい高エントロピーの超音波導体設計のための洞察を提供します.
関連する概念動画
01:19Ionic Strength: Effects on Chemical Equilibria
1.6K
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...
1.6K
02:48Ionic Bonding and Electron Transfer
41.9K
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.
41.9K
03:45Formation of Complex Ions
23.9K
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...
23.9K
01:12Ionic Strength: Overview
1.5K
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...
1.5K
00:42Ionic Bonds
118.8K
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...
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...
118.8K
01:17Theory of Metallic Conduction
1.4K
The conduction of free electrons inside a conductor is best described by quantum mechanics. However, a classical model makes predictions close to the results of quantum mechanics. It is called the theory of metallic conduction.
In this theory, Newton's second law of motion is used to determine the acceleration of an electron in the presence of an applied electric field. Then, its velocity is expressed via this acceleration.
An electron moves through the crystal, containing positive ions,...
In this theory, Newton's second law of motion is used to determine the acceleration of an electron in the presence of an applied electric field. Then, its velocity is expressed via this acceleration.
An electron moves through the crystal, containing positive ions,...
1.4K