圧力下:ナトリウムイオン固体電解質の構造とイオン伝導に対する機械化学的影響 Na3PS4
Theodosios Famprikis1,2,3,4, Ö Ulaş Kudu1, James A Dawson2,5
1Laboratoire de Réactivité et Chimie des Solides (LRCS), CNRS UMR 7314, Université de Picardie Jules Verne, 80039 Amiens, France.
Journal of the American Chemical Society
|October 15, 2020
まとめ
機械化学合成は,構造的変化を誘導することによって,Na3PS4のナトリウムイオン伝導性を高めます. 固体の電解質の性質を明らかにします 固体の電解質の性質を明らかにします
科学分野:
- 材料科学
- 固体化学
- 電気化学
背景:
- 固体電池の進歩には不可欠です
- Na3PS4のイオン伝導性に対する機械化学合成の影響については,より深い理解が必要である.
研究 の 目的:
- Na3PS4における合成-特性関係を包括的に分析する.
- 機械化学合成による構造的およびイオン輸送機構の解明.
主な方法:
- difrraction (ブラッグ,PDF),スペクトロスコーピ (インペデンス,ラマン,NMR,INS),およびab initioシミュレーションを使用した.
- 変圧阻力スペクトロスコピーを実行し,アクティベーションボリュームを決定します.
- 局所的なナトリウム障害とフレームワークの記述を含む構造的変化を調査した.
主要な成果:
- 球磨 Na3PS4 のより正確な記述として局所四角構造を特定し,ナトリウム障害を強調した.
- ボールで磨いたサンプルで Na+ 移行の活性化量は ~30% 増加しました.
- 球磨の伝導性の向上は,外部圧力を適用することによって複製できることを実証しました.
結論:
- 固体電解質に対する機械化学合成効果は,圧力,張力,活性化量によって理解できる.
- この研究は,合成制御を通じて固体電解質の性質を分析し,最適化するための枠組みを提供します.
関連する概念動画
01:19Ionic Strength: Effects on Chemical Equilibria
2.3K
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...
2.3K
01:12Mechanically-gated Ion Channels
7.4K
Mechanically-gated ion channels are proteins found in eukaryotic and prokaryotic cell membranes that open in response to mechanical stress. Tension, compression, swelling, and shear stress can alter the conformation of the protein, opening a transmembrane channel that allows the passage of ions for signal transmission. In eukaryotes, mechanically-gated channels are distributed in several regions like the neurons, lungs, skin, bladder, and heart, where they play critical roles in numerous...
7.4K
02:40Osmosis and Osmotic Pressure of Solutions
45.0K
A number of natural and synthetic materials exhibit selective permeation, meaning that only molecules or ions of a certain size, shape, polarity, charge, and so forth, are capable of passing through (permeating) the material. Biological cell membranes provide elegant examples of selective permeation in nature, while dialysis tubing used to remove metabolic wastes from blood is a more simplistic technological example. Regardless of how they may be fabricated, these materials are generally...
45.0K
01:26Voltage-gated Ion Channels
9.8K
Voltage-gated ion channels are transmembrane proteins that open and close in response to changes in the membrane potential. They are present on the membranes of all electrically excitable cells such as neurons, heart, and muscle cells.
Generally, all voltage-gated ion channels have a 'voltage-sensing domain' that spans the lipid bilayer. The charged residues in the sensor move in response to the membrane potential changes that open the channel allowing ions movement. There are several...
Generally, all voltage-gated ion channels have a 'voltage-sensing domain' that spans the lipid bilayer. The charged residues in the sensor move in response to the membrane potential changes that open the channel allowing ions movement. There are several...
9.8K
02:48Ionic Bonding and Electron Transfer
47.9K
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.
47.9K