相关实验视频
Updated: Jul 11, 2025

06:58
Zinc-Sponge Battery Electrodes that Suppress Dendrites
Published on: September 29, 2020
4.4K
通过优化 ZnSO4 电解质度来建立超低自放电 Zn-I 电池
Hanbing Wang1, Xuan Liu1, Junsen Zhong1
1College of Environment and Materials Engineering, Yantai University, Yantai, 264005, China.
Small (Weinheim an der Bergstrasse, Germany)
|November 16, 2023
概括
这项研究通过优化电解质度来增强- (Zn-I2) 电池,在1000小时后显著降低自放电率至17.1%,并将周期寿命延长到43,000个周期.
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:
- - (Zn-I2) 电池由于成本低,能量密度高,因此对大规模储能充满希望.
- 然而,挑战包括多硫化物穿,树脂和腐蚀引起的快速自放电和短寿命.
研究的目的:
- 为了抑制Zn-I2电池的自放电率.
- 为了提高Zn-I2电池的循环寿命.
- 探索电解质操纵以提高电池性能.
主要方法:
- 调整 ZnSO4 电解质的度以操纵溶解结构.
- 研究电解质度对自放电和循环寿命的影响.
- 分析自由水含量,溶解结构和溶解的变化.
主要成果:
- 在1000小时后实现了前所未有的17.1%的自放电率 (82.9%的容量保留).
- 循环寿命延长到超过10,000个和43,000个循环,分别为1 A/g和5 A/g.
- 证明的好处包括减少自由水,修改溶解和降低I2溶解.
结论:
- 优化的ZnSO4电解质度显著提高了Zn-I2电池的稳定性和寿命.
- 这项工作提出了一种可靠且价格合理的Zn-I2电池,作为酸电池的可行替代品.
- 电解质工程是克服水性金属电池局限性的关键策略.
相关概念视频
Standard Electrode Potentials
44.0K
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...
44.0K
Formation of Complex Ions
23.7K
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...
23.7K
Concentration Cells
22.8K
A concentration cell is a type of a voltaic cell constructed by connecting two almost identical half-cells, both based on the same half-reaction and using the same electrode, differing only in the concentration of one redox species. A concentration cell's potential, therefore, is determined only by the concentration difference of the particular redox species.
Consider the following voltaic cell:
Consider the following voltaic cell:
22.8K
Ionic Strength: Overview
1.4K
The ionic strength of a solution is a quantitative way of expressing the total electrolyte concentration of a solution. This concept was first introduced in 1921 by two American physical chemists, Gilbert N. Lewis and Merle Randall, while describing the activity coefficient of strong electrolytes. During the calculation of ionic strength (I or μ), all the cations and anions are considered. However, the concentration (c) of an ion with a greater charge number (z) has a greater contribution...
1.4K

