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Electrolysis

Electrolysis

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...

Electromotive Force

Electromotive Force

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...

Aqueous Solutions and Heats of Hydration

Aqueous Solutions and Heats of Hydration

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...

Electrolyte and Nonelectrolyte Solutions

Electrolyte and Nonelectrolyte Solutions

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.

Ladder Diagrams: Redox Equilibria

Ladder Diagrams: Redox Equilibria

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+...

Ionic Bonding and Electron Transfer

Ionic Bonding and Electron Transfer

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.

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Updated: Jul 1, 2025

Generation and Control of Electrohydrodynamic Flows in Aqueous Electrolyte Solutions

Generation and Control of Electrohydrodynamic Flows in Aqueous Electrolyte Solutions

Published on: September 7, 2018

高圧水性電解質を可能にする外球電子移転

Fan Zhang¹, Ting Liao^2,3, Hong Peng⁴

¹School of Chemistry and Physics, Queensland University of Technology, 2 George Street, Brisbane 4000, Queensland, Australia.

Journal of the American Chemical Society

|March 11, 2024

まとめ

この要約は機械生成です。

カテコール (CAT) を水性電解質に導入すると,外界球の電子転送を可能にすることで,電圧の窓を3.24Vに大幅に拡張します. この技術革新は水性亜鉛イオン電池の安全性と性能を向上させます

さらに関連する動画

Electrochemical Detection of Deuterium Kinetic Isotope Effect on Extracellular Electron Transport in Shewanella oneidensis MR-1

Electrochemical Detection of Deuterium Kinetic Isotope Effect on Extracellular Electron Transport in Shewanella oneidensis MR-1

Published on: April 16, 2018

Self-standing Electrochemical Set-up to Enrich Anode-respiring Bacteria On-site

Self-standing Electrochemical Set-up to Enrich Anode-respiring Bacteria On-site

Published on: July 24, 2018

関連する実験動画

Last Updated: Jul 1, 2025

Generation and Control of Electrohydrodynamic Flows in Aqueous Electrolyte Solutions

Generation and Control of Electrohydrodynamic Flows in Aqueous Electrolyte Solutions

Published on: September 7, 2018

Electrochemical Detection of Deuterium Kinetic Isotope Effect on Extracellular Electron Transport in Shewanella oneidensis MR-1

Electrochemical Detection of Deuterium Kinetic Isotope Effect on Extracellular Electron Transport in Shewanella oneidensis MR-1

Published on: April 16, 2018

Self-standing Electrochemical Set-up to Enrich Anode-respiring Bacteria On-site

Self-standing Electrochemical Set-up to Enrich Anode-respiring Bacteria On-site

Published on: July 24, 2018

科学分野:

電気化学
材料科学
エネルギー貯蔵

背景:

金属イオン電池の水性電解質は,低電圧窓 (1.23V) と水素進化のような副作用によって制限されます.
これらの制限は,安全で低コストの水性電池の可能性を妨げています.

研究の目的:

金属イオン電池の安全性とエネルギー密度を高めるための高電圧水性電解質を開発する.
水の反応を抑制する外球電子移転のメカニズムを調査する.

主な方法:

カテコール (CAT) を水性電解質に導入する.
Znイオン電池モデルを用いた外球電子移転機構の調査.
Zn//Zn対称性および Zn//V2O5の充電電池の電気化学的特徴.

主要な成果:

水の反応を阻害することで 3. 24Vの電気化学の窓を拡大した.
カテコールとZn2+-H2O溶解殻を含む外球電子移転メカニズムが実証された.
Zn//V2O5の充電電池は,高いエネルギー密度 (~380 W h kg-1) と優れたサイクル安定性 (3000サイクルにわたって92%の保持率) を示した.
Zn/Zn対称電池は4000時間の寿命を達成しました.

結論:

外球電子転送戦略は高電圧の水性電解質を効果的に可能にします.
この方法は水性亜鉛イオン電池の性能を大幅に改善します.
次の世代の高圧水性エネルギー貯蔵システムの設計に道を切り開きます