使用乙作为单溶剂,用于 -70°C的超低温超级电容器
Yiheng Qi1, Chuang Bao1, Xuanchi Li1
1State Key Laboratory of Clean Energy Utilization, College of Energy Engineering, Zhejiang University, Hangzhou, Zhejiang Province, 310027, P. R. China.
ChemPlusChem
|April 25, 2025
概括
乙 (ACT) 作为低温超级电容器的新型单溶剂,克服了传统电解质的局限性. 这一突破使得在极地地区和近距离太空探索等极端环境中可靠地储存能量.
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
- 化学工程是化学工程的重要组成部分.
背景情况:
- 商业超级电容器的低工作温度极限为-50°C,对于极地资源开发 (-60°C) 和近距离太空探索 (-70°C) 等极端应用是不够的.
- 现有的辅溶剂策略可以提高工作温度,但由于电导率低,溶解能量高,生产成本增加而受到损害.
研究的目的:
- 开发一种新的低温电解质,使用乙 (ACT) 作为单溶剂.
- 在极端温度条件下解决传统超级电容器电解质的局限性.
主要方法:
- 研究的乙的特性:中等介电系数 (ε=20.9),低的供体数 (10.67),以及超低的点.
- 使用基于ACT的电解质制造和测试的超级电容器.
- 评估电化学性能,包括容量保留,循环稳定性,功率密度和能量密度在广泛的温度范围内.
主要成果:
- ACT显示强烈的离子解离和弱化的离子溶剂相互作用,促进了快速的离子运输和溶解.
- 使用基于ACT的电解质的超级电容器在20°C至-70°C时实现了86.5%的电容保留.
- 这些设备表现出高循环稳定性 (97.75%在13,000个循环后) 和出色的功率/能量密度 (3776 W kg-1 @ 14.16 Wh kg-1).
结论:
- 乙是一种有前途的单溶剂,用于开发高性能,低温超级电容电解质.
- 基于ACT的电解质提供了优越的操作温度范围,增强的稳定性和成本效益.
- 由于毒性低和生产成本低,这种进步在极端环境中对储能具有重大潜力.
更多相关视频
08:59Synthesizing a Gel Polymer Electrolyte for Supercapacitors, Assembling a Supercapacitor Using a Coin Cell, and Measuring Gel Electrolyte Performance
Published on: November 30, 2022
4.4K
09:20Microhoneycomb Monoliths Prepared by the Unidirectional Freeze-drying of Cellulose Nanofiber Based Sols: Method and Extensions
Published on: May 24, 2018
8.8K
相关概念视频
02:12Solvating Effects
7.2K
An understanding of the solvating effect helps rationalize the relation between solvation and acidity of the compound. In addition, this also explains the relative stability of conjugate bases for compounds with different pKa values. This lesson details, in-depth, the principle of solvating effects. The strength of an acid and the stability of its corresponding conjugate base are determined using pKa values. This observed relationship is a consequence of solvation, which is the interaction...
7.2K
01:12Solvents
63.9K
A solvent is a substance, most often a liquid, that can dissolve other substances. Here, the substance being dissolved is called a solute. When a solvent and a solute combine, they form a solution - a homogenous mixture of both the solvent and the solute. Water is a universal biological solvent. Its polar structure allows it to dissolve many other polar compounds. The ability of water to dissolve is governed by a balance between water molecules binding to each other and binding to the solute.
A...
A...
63.9K
01:24Superconductor
1.0K
A substance that reaches superconductivity, a state in which magnetic fields cannot penetrate, and there is no electrical resistance, is referred to as a superconductor. In 1911, Heike Kamerlingh Onnes of Leiden University, a Dutch physicist, observed a relation between the temperature and the resistance of the element mercury. The mercury sample was then cooled in liquid helium to study the linear dependence of resistance on temperature. It was observed that, as the temperature decreased, the...
1.0K
01:18Supercritical Fluid Chromatography
180
Supercritical fluid chromatography (SFC) provides a beneficial substitute for gas chromatography (GC) and liquid chromatography (LC) for certain samples because it merges the top attributes of both techniques. SFC allows the separation and analysis of compounds that GC or LC does not easily manage. These compounds are traditionally nonvolatile or thermally unstable, making GC unsuitable and lacking functional groups required for HPLC analysis.
SFC utilizes a supercritical fluid mobile phase,...
SFC utilizes a supercritical fluid mobile phase,...
180