陽子伝導性が強化された無水離子系における分子起源
Zaneta Wojnarowska1, Krzysztof J Paluch, Evgeni Shoifet
1Institute of Physics, University of Silesia , Uniwersytecka 4, 40-007 Katowice, Poland.
Journal of the American Chemical Society
|January 7, 2015
まとめ
新しい陽子伝導物質が合成され,研究されました. 内部プロトン・ホッピングは,電離構造の中で,電荷キャリアの移動性に著しく影響を及ぼし,燃料電池やバッテリーの無水電解質のための新しい設計戦略を提供します.
科学分野:
- 材料科学 材料科学とは
- 電気化学 電気化学について
- 物理化学 物理化学
背景:
- イオン系における陽子の伝導性は,燃料電池や電池にとって極めて重要です.
- 商業的な応用は,無水状態での陽子ジャンプの理解の欠如によって妨げられています.
研究 の 目的:
- 新型無水性物質における陽子ジャンプを制御する要因を調査する.
- 陽子構造と陽子伝導性の関係を探求する.
- 先進的な陽子伝導体の設計のための洞察を提供します.
主な方法:
- リドカイン塩基と酸の反応による新型陽子伝導物質の合成.
- 環境および高圧下での伝導性の実験測定.
- プロトンの移動性をモデル化するための密度関数理論 (DFT) 計算.
主要な成果:
- 合成塩の間の伝導特性における根本的な違いを特定した.
- DFTの計算により,カチオン内の内部陽子のジャンプが,電荷キャリア経路に影響を及ぼすことが明らかになった.
- 陽子構造と陽子の移動性の間のリンクを確立した.
結論:
- 内部陽子ホッピングは,無水質陽子の伝導性における重要な要因である.
- この発見は,プロティックイオンガラスのグロットサス型メカニズムに関する新たな視点を提示する.
- 高性能無水質陽子伝導材料の設計のための新しい戦略が提案されています.
さらに関連する動画
08:54Vibrational Spectra of a N719-Chromophore/Titania Interface from Empirical-Potential Molecular-Dynamics Simulation, Solvated by a Room Temperature Ionic Liquid
Published on: January 25, 2020
6.1K
05:33Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications
Published on: August 12, 2013
22.5K
関連する概念動画
01:23Theory of Strong Electrolytes
114
The interionic forces of the strong electrolytes depend on the solvent's dielectric constant, which is the ability of a solvent to store electrical energy, based on its polarizability. and the solution's concentration. In high-dielectric solvents and in dilute solutions, weak electrostatic forces keep ions apart. However, in low-dielectric solvents or concentrated solutions, stronger interionic forces may cause ions to pair up as ionic doublets despite being fully ionized. The theory of strong...
114
02:42Aqueous Solutions and Heats of Hydration
19.1K
Water and other polar molecules are attracted to ions. The electrostatic attraction between an ion and a molecule with a dipole is called an ion-dipole attraction. These attractions play an important role in the dissolution of ionic compounds in water.
When ionic compounds dissolve in water, the ions in the solid separate and disperse uniformly throughout the solution because water molecules surround and solvate the ions, reducing the strong electrostatic forces between them. This process...
When ionic compounds dissolve in water, the ions in the solid separate and disperse uniformly throughout the solution because water molecules surround and solvate the ions, reducing the strong electrostatic forces between them. This process...
19.1K
01:28Ionic Association
202
The ionic association is the association of oppositely charged ions in an electrolyte solution to form ion pairs. Bjerrum defined ion pairs as two oppositely charged ions whose electrostatic attraction exceeds the thermal energy of the system, typically expressed as 2kT. Electrostatic attraction depends on ionic charge, separation distance, and the dielectric constant of the medium. Thermal energy, represented by kT, reflects the tendency of ions to move independently due to molecular motion.
202
03:13Intermolecular Forces
79.2K
Atoms and molecules interact through bonds (or forces): intramolecular and intermolecular. The forces are electrostatic as they arise from interactions (attractive or repulsive) between charged species (permanent, partial, or temporary charges) and exist with varying strengths between ions, polar, nonpolar, and neutral molecules. The different types of intermolecular forces are ion–dipole, dipole–dipole, hydrogen bonds, and dispersion; among these, dipole–dipole, hydrogen...
79.2K
02:54Molecular and Ionic Solids
21.1K
Crystalline solids are divided into four types: molecular, ionic, metallic, and covalent network based on the type of constituent units and their interparticle interactions.
Molecular Solids
Molecular crystalline solids, such as ice, sucrose (table sugar), and iodine, are solids that are composed of neutral molecules as their constituent units. These molecules are held together by weak intermolecular forces such as London dispersion forces, dipole-dipole interactions, or hydrogen bonds, which...
Molecular Solids
Molecular crystalline solids, such as ice, sucrose (table sugar), and iodine, are solids that are composed of neutral molecules as their constituent units. These molecules are held together by weak intermolecular forces such as London dispersion forces, dipole-dipole interactions, or hydrogen bonds, which...
21.1K
01:19Ionic Strength: Effects on Chemical Equilibria
3.1K
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...
3.1K