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関連する概念動画

Electrolyte and Nonelectrolyte Solutions02:21

Electrolyte and Nonelectrolyte Solutions

63.2K
Substances that undergo either a physical or a chemical change in solution to yield ions that can conduct electricity are called electrolytes. If a substance yields ions in solution, that is, if the compound undergoes 100% dissociation, then the substance is a strong electrolyte. Complete dissociation is indicated by a single forward arrow. For example, water-soluble ionic compounds like sodium chloride dissociate into sodium cations and chloride anions in aqueous solution.
63.2K
Ionic Bonds00:42

Ionic Bonds

118.5K
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...
118.5K
Introduction to Electrolytes01:33

Introduction to Electrolytes

10.3K
In humans, electrolytes play a vital role in various physiological processes. Balancing electrolyte levels is essential for normal body functions; their imbalance can be life-threatening. The major electrolytes include sodium, potassium, chloride, calcium, phosphate, and bicarbonate. They are primarily involved in physiological processes, such as nerve signal transmission, membrane trafficking, muscle contraction, buffering body fluids, and balancing water levels in the body.
Role of Sodium
One...
10.3K
Ionic Strength: Overview01:12

Ionic Strength: Overview

1.4K
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...
1.4K
Ionic Bonding and Electron Transfer02:48

Ionic Bonding and Electron Transfer

41.6K
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. 
41.6K
Molecular and Ionic Solids02:54

Molecular and Ionic Solids

17.2K
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...
17.2K

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Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications
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Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications

Published on: August 12, 2013

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固体電解質はイオン伝導性を再定義する

Anton Van der Ven1

  • 1Materials Department, University of California Santa Barbara, CA, USA.

Science (New York, N.Y.)
|November 2, 2023
PubMed
まとめ
この要約は機械生成です。

固体電解質のイオン輸送メカニズムを理解することは 先進的なリチウム電池の設計の鍵です この研究はバッテリーの性能と安全性を向上させるための洞察を提供します.

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Synthesis of Ionic Liquid Based Electrolytes, Assembly of Li-ion Batteries, and Measurements of Performance at High Temperature
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Electric-field Control of Electronic States in WS2 Nanodevices by Electrolyte Gating
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Electric-field Control of Electronic States in WS2 Nanodevices by Electrolyte Gating

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科学分野:

  • 材料科学
  • 電気化学
  • 固体化学

背景:

  • 固体電解質は次世代のリチウム電池にとって不可欠であり,液体電解質よりも安全性とエネルギー密度の改善を可能にします.
  • これらの固体材料内のイオン輸送の基本的メカニズムを理解することは,それらの性能を最適化するために不可欠です.
  • 現在,様々な固体電解質システムにおけるイオン移動の正確な経路とダイナミクスに関する知識のギャップが存在する.

研究 の 目的:

  • 固体電解質におけるイオン輸送の基本的メカニズムを解明する.
  • 高性能リチウム電池の合理的な設計のための枠組みを提供する.
  • 固体系のイオン伝導性を影響する重要な要因を特定する.

主な方法:

  • イオン拡散経路の計算モデル化
  • イオン伝導性を測定するための電気化学阻力スペクトロスコーピー.
  • X線微分と顕微鏡を用いた構造分析.

主要な成果:

  • 固体電解質内の特定のイオンホッピングメカニズムと拡散経路を特定した.
  • 物質構造とイオン伝導性の関係を定量化した.
  • これらのメカニズムの理解が材料の選択と最適化にどのように役立つかを示した.

結論:

  • 解明されたイオン輸送メカニズムは,固体電解質の開発のための重要な洞察を提供します.
  • この理解は より安全で効率的なリチウム電池の 合理的な設計を促進します
  • 固体電池技術の商用化を加速するために,さらなる研究がこれらの発見を活用することができます.