在水性电解质中Mo4VC4TMXene的电化学特性
Iftikhar Hussain1,2, Faisal Rehman3,4,5, Mohit Saraf2
1Department of Mechanical Engineering, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, Hong Kong 19104, China.
ACS applied materials & interfaces
|July 15, 2024
概括
新型的Mo4VC4T MXene,一种厚厚的二维材料,对储能充满希望. 它在酸性电解质中的电容性表明了先进的电化学设备的潜力.
科学领域:
- 材料科学 材料科学 材料科学
- 电化学 电化学 电化学
- 纳米技术纳米技术
背景情况:
- MXenes 是一类新的二维过渡金属碳化物.
- M5C4T MXenes是已知的最厚的二维材料,具有储能潜力.
- Mo4VC4T MXene提供多种氧化状态,增强其电化学特性.
研究的目的:
- 为了评估Mo4VC4T MXene薄膜的电化学特性.
- 研究不同电解质中的阴离子间歇和电荷储存机制.
- 评估Mo4VC4T MXene在储能应用中的潜力.
主要方法:
- 独立的Mo4VC4T MXene薄膜的电化学表征.
- 开始分子动力学 (AIMD) 模拟用于阴子间隔研究.
- 密度函数理论 (DFT) 计算用于电荷存储机制分析.
主要成果:
- 在3M H2SO4.4中观察到的2 mV s-1的219 Fg-1的最高重力学容量.
- 化Li+,Na+和K+离子在MXene表面形成一个电双层 (EDL).
- EDL形成被确定为主要电荷存储机制.
结论:
- Mo4VC4T MXene在水性电解质中显示出电化学能量储存的巨大潜力.
- 该研究阐明了电荷储存机制,突出了EDL的形成.
- 这项研究为开发使用新型MXene材料的下一代储能设备铺平了道路.
相关概念视频
Electromotive Force
26.1K
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...
26.1K
Interfacial Electrochemical Methods: Overview
233
Interfacial electrochemical methods focus on the phenomena occurring at the boundary between an electrode and a solution, as opposed to bulk methods that concentrate on the solution's overall properties. These interfacial methods are classified as either static or dynamic based on the presence of a nonzero current in the electrochemical cell and the consistency of analyte concentrations. Static methods, such as potentiometry, measure the cell's potential without any significant current...
233
Electrolyte and Nonelectrolyte Solutions
62.7K
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.
62.7K
Electrolytes: van't Hoff Factor
33.0K
Colligative Properties of Electrolytes
The colligative properties of a solution depend only on the number, not on the identity, of solute species dissolved. The concentration terms in the equations for various colligative properties (freezing point depression, boiling point elevation, osmotic pressure) pertain to all solute species present in the solution. Nonelectrolytes dissolve physically without dissociation or any other accompanying process. Each molecule that dissolves yields one...
The colligative properties of a solution depend only on the number, not on the identity, of solute species dissolved. The concentration terms in the equations for various colligative properties (freezing point depression, boiling point elevation, osmotic pressure) pertain to all solute species present in the solution. Nonelectrolytes dissolve physically without dissociation or any other accompanying process. Each molecule that dissolves yields one...
33.0K
Ladder Diagrams: Redox Equilibria
447
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+...
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+...
447
Electrochemistry: Overview
1.9K
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,...
1.9K


