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関連する概念動画

Electrolysis03:00

Electrolysis

26.5K
In a galvanic cell, the electrical work is done by a redox system on its surroundings as electrons produced by the spontaneous redox reactions are transferred through an external circuit. Alternatively, an external circuit does work on a redox system by imposing a voltage sufficient to drive an otherwise nonspontaneous reaction in a process known as electrolysis. For instance, recharging a battery involves the use of an external power source to drive the spontaneous (discharge) cell reaction in...
26.5K
Electron Behavior01:09

Electron Behavior

8.1K
Electrons are negatively charged subatomic particles attracted to and orbit around the positively-charged nucleus of an atom. They reside in spaces associated with energy levels called shells and are further organized into subshells and orbitals within each shell.
Electrons Orbit the Nucleus
Electrons are found in specific locations outside of the nucleus. The shell in which an electron resides indicates the general energy level of the electron: those closer to the nucleus have less energy,...
8.1K
Electrochemistry: Overview01:04

Electrochemistry: Overview

2.0K
Electrochemistry is the branch of chemistry that studies the relationship between electrical quantities and chemical reactions, particularly oxidation and reduction. Oxidation is the loss of electrons from a substance, whereas reduction refers to the gain of electrons. A substance with a strong electron affinity is called an oxidizing agent (oxidant), and a reducing agent (reductant) is a species that donates electrons. Oxidation and reduction processes are pivotal to electrochemical reactions,...
2.0K
Ladder Diagrams: Redox Equilibria01:30

Ladder Diagrams: Redox Equilibria

460
Ladder diagrams are useful tools for understanding redox equilibrium reactions, especially the effects of concentration changes on the electrochemical potential of the reaction. The vertical axis in the redox ladder diagrams represents the electrochemical potential, E. The area of predominance is demarcated using the Nernst equation.
Consider the Fe3+/Fe2+ half-reaction, which has a standard-state potential of +0.771 V. At potentials more positive than +0.771 V, Fe3+ predominates, whereas Fe2+...
460
Electromotive Force02:36

Electromotive Force

26.4K
Electricity is generated by either electrons or ions flowing through a solution or a conducting medium. This flow of electrons or specifically electrical charge is defined as an electric current. When electrons move through a wire, they generate an electric current. It can be recalled  that in a redox reaction, electrons are lost and gained. In the spontaneous redox reaction of zinc  with copper, when zinc is immersed in a copper ion solution, a transfer of electrons from one...
26.4K
Exceptions to the Octet Rule02:55

Exceptions to the Octet Rule

28.3K
Many covalent molecules have central atoms that do not have eight electrons in their Lewis structures. These molecules fall into three categories:
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Updated: Jul 11, 2025

Electrochemical Impedance Spectroscopy as a Tool for Electrochemical Rate Constant Estimation
08:41

Electrochemical Impedance Spectroscopy as a Tool for Electrochemical Rate Constant Estimation

Published on: October 10, 2018

24.9K

電子を電極で数える

Samuel M Weaver1, Jack D Sundberg1, Connor C Slamowitz1

  • 1Department of Chemistry, The University of North Carolina, Chapel Hill, North Carolina 27514, United States.

Journal of the American Chemical Society
|November 17, 2023
PubMed
まとめ
この要約は機械生成です。

新しいBadELFアルゴリズムは,従来の方法の限界を克服して,電極内の電子電荷を正確に定量化します. この進歩は,電極の性質と識別に関する重要な洞察を提供します.

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In Situ Lithiated Reference Electrode: Four Electrode Design for In-operando Impedance Spectroscopy
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In Situ Lithiated Reference Electrode: Four Electrode Design for In-operando Impedance Spectroscopy

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Three-electrode Coin Cell Preparation and Electrodeposition Analytics for Lithium-ion Batteries
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Three-electrode Coin Cell Preparation and Electrodeposition Analytics for Lithium-ion Batteries

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Electrochemical Impedance Spectroscopy as a Tool for Electrochemical Rate Constant Estimation
08:41

Electrochemical Impedance Spectroscopy as a Tool for Electrochemical Rate Constant Estimation

Published on: October 10, 2018

24.9K
In Situ Lithiated Reference Electrode: Four Electrode Design for In-operando Impedance Spectroscopy
09:36

In Situ Lithiated Reference Electrode: Four Electrode Design for In-operando Impedance Spectroscopy

Published on: September 12, 2018

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Three-electrode Coin Cell Preparation and Electrodeposition Analytics for Lithium-ion Batteries
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Three-electrode Coin Cell Preparation and Electrodeposition Analytics for Lithium-ion Batteries

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科学分野:

  • 材料化学
  • コンピュータ材料科学
  • 固体物理学

背景:

  • 精密な電荷統合は 材料の性質を理解する上で 極めて重要です 特に電極のような複雑なシステムでは
  • ベーダー法などの従来の方法は,独自の波動関数特性により,電極内の局所電子の電荷を定量化することがしばしば失敗する.
  • この制限は,電極の研究と応用を妨げます.

研究 の 目的:

  • 信頼性の高い電荷統合のための新しいアルゴリズムを開発する.
  • 独特の電子構造を持つ材料に対する既存の電荷分割方法の限界に対処する.
  • 電子の電荷と性質を正確に定量化できるようにする.

主な方法:

  • 電子局所関数 (ELF) に基づいて電荷を分割するBadELFアルゴリズムを開発した.
  • 電子を特定するために ELF のバダー分割と,原子を特定するために ELF のヴォロノイ分割を使用する.
  • イオン化合物と電極の原子半径と酸化状態を定量化するためにBadELF方法を適用しました.

主要な成果:

  • BadELF方法は,従来の方法とは異なり,化学的に有意義な電荷定量化を提供します.
  • イオン化合物の場合,BadELFはシャノン結晶半径とBader法に匹敵する酸化状態を生成する.
  • このアルゴリズムは,電極の電子を成功裏に識別し,その電荷分布の洞察を提供します.

結論:

  • BadELFアルゴリズムは,電極に正確な電荷統合のための堅実な戦略を提供します.
  • この方法は,電極のユニークな電子構造によってもたらされる課題を克服します.
  • BadELFは,電極の性質をより深く理解し,その識別に役立ちます.