相关实验视频
Updated: Jul 4, 2025

06:58
Zinc-Sponge Battery Electrodes that Suppress Dendrites
Published on: September 29, 2020
4.3K
通过局部结合层对Zn金属的界面工程,用于高度可逆的水性离子电池
Zhenjie Liu1, Guanjie Li2, Murong Xi1
1State Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources, College of Chemistry, Xinjiang University, Urumqi, 830017, Xinjiang, China.
Angewandte Chemie (International ed. in English)
|February 2, 2024
概括
研究人员开发了一种新的保护层,用于水性离子电池中的阳极. 这层增强了稳定性和寿命,克服了像状岩的生长等问题,以获得更安全,更有效的能源储存.
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:
- 水性离子电池提供安全性和容量优势.
- 金属阳极的不稳定性 (树突,副作用) 限制了实际使用.
研究的目的:
- 在水性离子电池中设计稳定的阳极的保护层.
- 为了减轻树的生长和寄生虫反应.
主要方法:
- 在120°C使用基于Zn2+的易斯酸合成了一个循环多烯二聚合物 (CPANZ).
- 在阳极上应用CPANZ作为局部结合层.
- 研究了CPANZ层对Zn2+的亲和力及其保护作用.
主要成果:
- 富含胺的CPANZ层有效地引导了Zn2+的沉积.
- 这层通过阻断质子流量来抑制的进化.
- 修改后的电极在半电池和袋式电池中显示出增强的循环寿命和耐用性.
结论:
- 局部结合的CPANZ层为高性能水性阳极提供了可行的策略.
- 这种方法解决了金属阳极稳定性的关键问题.
- 这些发现为提高离子电池的安全性和效率铺平了道路.
相关概念视频
Interfacial Electrochemical Methods: Overview
248
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...
248
Standard Electrode Potentials
43.9K
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...
43.9K
Extraction: Advanced Methods
447
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...
447
Electrodeposition
634
Electrodeposition is a technique used to separate an analyte from interferents by electrochemical processes. Here, the analyte is a metal ion that can be deposited on an electrode immersed in the sample solution. The electrochemical setup consists of an anode and a cathode. When an electric current is applied to the setup, oxidation occurs at the anode. At the cathode, which consists of a large metal surface, metal ions undergo reduction and deposit onto the surface.
Electrodeposition can...
Electrodeposition can...
634

