相关实验视频
Updated: May 15, 2025

06:58
Zinc-Sponge Battery Electrodes that Suppress Dendrites
Published on: September 29, 2020
4.3K
用微量酸诱导的界面分子层,用于高度稳定的阳极
Jinlong Zhang1, Bing Cai1, Qing Wu1
1Department of Polymeric Materials & Engineering, College of Materials & Metallurgy, Guizhou University, Huaxi District, Guiyang 550025, P. R. China. huangj@gzu.edu.cn.
概括
酸 (CGA) 通过形成保护性界面层来增强阳极的稳定性. 这种添加剂显著延长了电池的周期寿命,并提高了电池中的库伦比效率.
科学领域:
- 电化学 电化学 电化学
- 材料科学 材料科学 材料科学
- 储能 储能 储能 储能 储能 储能
背景情况:
- 阳极对于可充电电池至关重要,但存在稳定性问题.
- 开发有效的电解质添加剂是提高阳极性能的关键.
- 酸 (CGA) 具有作为稳定剂的潜力.
研究的目的:
- 为了研究酸 (CGA) 作为阳极的电解质添加剂.
- 了解CGA增强阳极稳定的机制.
- 为了评估基于的电池电池的性能改进.
主要方法:
- 用CGA添加剂对细胞进行电化学测试.
- 对溶解结构变化的分析.
- 在阳极上形成的界面分子层的表征.
主要成果:
- CGA改变了阳极周围的溶解结构.
- 一个保护性的界面分子层是由CGA形成的.
- 实现了5340小时的延长周期寿命和99.76%的库伦比效率.
- 在不对称和全细胞中观察到更好的性能.
结论:
- 酸 (CGA) 是一种高效的电解质添加剂,用于稳定阳极.
- 由CGA形成的保护界面层对于长期循环稳定性至关重要.
- CGA为推进高性能基储能系统提供了一个有前途的战略.
相关概念视频
Extraction: Advanced Methods
393
Metal ions can be separated from one another by complexation with organic ligands–the chelating agent– to form uncharged chelates. Here, the chelating agent must contain hydrophobic groups and behave as a weak acid, losing a proton to bind with the metal. Since most organic ligands used in this process are insoluble or undergo oxidation in the aqueous phase, the chelating agent is initially added to the organic phase and extracted into the aqueous phase. The metal-ligand complex is...
393
Interfacial Electrochemical Methods: Overview
207
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...
207
Standard Electrode Potentials
42.9K
On comparing the reactivity of silver and lead, it is observed that the two ionic species, Ag+ (aq) and Pb2+ (aq), show a difference in their redox reactivity towards copper: the silver ion undergoes spontaneous reduction, while the lead ion does not. This relative redox activity can be easily quantified in electrochemical cells by a property called cell potential. This property is commonly known as cell voltage in electrochemistry, and it is a measure of the energy which accompanies the charge...
42.9K

