电解质溶解工程稳定无阳极金属电池与4.0V级分层氧化物阴极
Yeguo Zou1,2, Baodan Zhang1, Haiyan Luo1
1State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, P. R. China.
Advanced materials (Deerfield Beach, Fla.)
|September 30, 2024
概括
这项研究为无阳极金属电池引入了一种新型电解质,提高了极端温度的稳定性. 新的设计使高压阴极循环和高效的涂料成为可能,为先进的能量存储铺平了道路.
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:
- 无阳极金属电池 (AFSMB) 提供高能量密度,但面临电解质和接口不稳定性的挑战,特别是在极端温度下.
- 现有的电解质在高电压和广泛的温度范围 (-40°C至60°C) 中难以保持稳定的接口.
研究的目的:
- 开发一种先进的电解质设计策略,以在苛刻的条件下稳定无阳极金属电池.
- 提高高压基电池的电化学性能和循环寿命.
主要方法:
- 电解质溶解工程被用来创建一个弱溶解稳定 (WSAS) 电解质.
- 该战略平衡了Na+-溶剂和Na+-离子相互作用,以在接口上促进接触离子对 (CIP) 和聚合物 (AGG).
- 在广泛的温度范围内,使用4.0V级分层氧化物阴极和工业多层无阳极囊细胞来评估性能.
主要成果:
- WSAS电解质促进了统一和稳定的接口层的形成,使4.0V级分层氧化物阴极从-40°C到60°C的高度稳定循环.
- 通过超高的平均库伦比效率 (CE) 达到99.89%,实现了NA/剥离的优异可逆性.
- 工业无阳极袋式电池在50个循环后保持了80%的容量,在-30°C下保持了74.3%的容量.
结论:
- 在极端温度下,WSAS电解质设计有效地解决了无阳极金属电池的界面不稳定性.
- 这一突破显著推进了用于实际应用的高能量密度电池的开发.
相关概念视频
Electrolysis
26.1K
In a galvanic cell, the electrical work is done by a redox system on its surroundings as electrons produced by the spontaneous redox reactions are transferred through an external circuit. Alternatively, an external circuit does work on a redox system by imposing a voltage sufficient to drive an otherwise nonspontaneous reaction in a process known as electrolysis. For instance, recharging a battery involves the use of an external power source to drive the spontaneous (discharge) cell reaction in...
26.1K
Electrodeposition
610
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...
610
Voltaic/Galvanic Cells
56.9K
Spontaneous Chemical Reactions
Spontaneous redox reactions occur abundantly in nature. The chemical reaction occurring in a disposable AA battery powering our remote controls is one such example of a spontaneous redox reaction. Another example is the immersion of coiled copper wire into an aqueous silver nitrate solution. The reaction shows a gradual, visually impressive color change from colorless to bright blue and the formation of a grey precipitate on the copper wire. In this experiment,...
Spontaneous redox reactions occur abundantly in nature. The chemical reaction occurring in a disposable AA battery powering our remote controls is one such example of a spontaneous redox reaction. Another example is the immersion of coiled copper wire into an aqueous silver nitrate solution. The reaction shows a gradual, visually impressive color change from colorless to bright blue and the formation of a grey precipitate on the copper wire. In this experiment,...
56.9K
Batteries and Fuel Cells
27.1K
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...
27.1K
Electrolyte and Nonelectrolyte Solutions
62.4K
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.
62.4K
Electrogravimetric Analysis: Overview
208
Electrogravimetric analysis measures the weight of an analyte deposited electrolytically onto a suitable working electrode. This method involves applying a potential to a pre-weighed electrode submerged in a solution, which results in the desired substance being deposited through reduction at the cathode or oxidation at the anode. The electrode's weight is recorded after deposition, and the difference in weight gives the analyte's weight in the solution.
To test the completeness of the...
To test the completeness of the...
208


