相关实验视频
Updated: May 31, 2025

06:58
Zinc-Sponge Battery Electrodes that Suppress Dendrites
Published on: September 29, 2020
4.3K
通过化欧特基电解质与限制性水诱导缺水接口,以实现高性能水性金属电池
Ping Luo1,2, Yuyuan Wang1, Wenwei Zhang3
1Hubei Provincial Key Laboratory of Green Materials for Light Industry, Hubei Engineering Laboratory of Automotive Lightweight Materials and Processing, School of Materials and Chemical Engineering, Hubei University of Technology, Wuhan, 430068, P. R. China.
Small (Weinheim an der Bergstrasse, Germany)
|January 23, 2025
概括
一种使用1,3-propanediol (PDO) 的新型水化电解质通过创建缺水接口,将循环寿命延长到3000小时,显著提高水性金属电池 (AZMB) 的稳定性.
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:
- 水性金属电池 (AZMBs) 面临着由于水的反应性而导致的树突形成和副作用的挑战.
- 改善阳极/电解质接口对于AZMB的性能和寿命至关重要.
研究的目的:
- 为AZMBs开发一种稳定的电解质,可以抑制树突和副作用.
- 研究1,3-二醇 (PDO) 在调节阳极接口中的作用.
主要方法:
- 一种含有三甲硫酸盐 (Zn(OTf) 2),1,3-二醇 (PDO) 和水的水合欧性电解质的配方.
- 电解质对阳极/电解质接口和沉积的影响的描述.
- 测试Zn//Zn对称细胞和Zn//V2O5//Zn//VO2全细胞.
主要成果:
- 基于PDO的电解质形成了一个缺水的接口,抑制树突和副作用.
- PDO影响Zn2+溶解,并在Zn (100) 平面上优先吸附,促进稳定的有机/无机SEI层.
- Zn//Zn对称细胞实现了3000小时的稳定循环.
- 与传统的电解质相比,Zn//V2O5细胞的特异容量是常规电解质的1.7倍,并且在100个循环后的保留率为93%.
结论:
- 研发的解电解质为增强AZMB循环稳定性提供了一个有前途的策略.
- PDO在界面稳定中发挥着关键作用,使高性能水性能量存储设备成为可能.
相关概念视频
Aqueous Solutions and Heats of Hydration
14.3K
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...
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...
14.3K
Standard Electrode Potentials
43.3K
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...
43.3K
Interfacial Electrochemical Methods: Overview
217
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...
217
Electrolyte and Nonelectrolyte Solutions
62.2K
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.
62.2K
Formation of Complex Ions
23.2K
A type of Lewis acid-base chemistry involves the formation of a complex ion (or a coordination complex) comprising a central atom, typically a transition metal cation, surrounded by ions or molecules called ligands. These ligands can be neutral molecules like H2O or NH3, or ions such as CN− or OH−. Often, the ligands act as Lewis bases, donating a pair of electrons to the central atom. These types of Lewis acid-base reactions are examples of a broad subdiscipline called coordination...
23.2K
Batteries and Fuel Cells
26.9K
A battery is a galvanic cell that is used as a source of electrical power for specific applications. Modern batteries exist in a multitude of forms to accommodate various applications, from tiny button batteries such as those that power wristwatches to the very large batteries used to supply backup energy to municipal power grids. Some batteries are designed for single-use applications and cannot be recharged (primary cells), while others are based on conveniently reversible cell reactions that...
26.9K

