相关实验视频
Updated: May 10, 2025
06:58
Zinc-Sponge Battery Electrodes that Suppress Dendrites
Published on: September 29, 2020
4.3K
一个无有机/无机介相,用于高度可逆的水性电池
Xingfu Yang1, Xiaoning Tang1, Jie Lei1
1School of Materials and Metallurgy, Guizhou University, Guiyang, 550025, P.R. China.
Angewandte Chemie (International ed. in English)
|April 23, 2025
概括
这项研究引入了一种环保的,无的固体电解质间相 (SEI) 用于使用N-乙-D-葡萄糖胺的水性电池. 这种新的SEI提高了阳极的稳定性和性能,为电池技术提供了一个可持续的替代方案.
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
- 可持续能源 可持续能源
背景情况:
- 强大的固体电解质介面 (SEI) 对于稳定水性电解质中的阳极至关重要,防止树的生长和副作用.
- 化SEI提供了优异的电化学稳定性和离子导电性,但由于其持久性,引起了环境和健康方面的担忧.
- 开发无替代品对于环保和安全的电池应用至关重要.
研究的目的:
- 为水性电池开发一种无的有机/无机混合SEI.
- 使用一种廉价且对环境无害的电解质添加剂,N-乙-D-葡萄糖胺 (NAG).
- 为了提高阳极的电化学性能和稳定性.
主要方法:
- 使用N-乙-D-葡萄糖胺 (NAG) 作为电解质添加剂,以促进在阳极上现场SEI的形成.
- 描述形成的混合SEI层 (有机Zn合物,无机ZnS,ZnCO3) 的组成和结构.
- 通过长期循环,库伦比克效率测量和全细胞测试来评估修改后的阳极的电化学性能.
主要成果:
- 该NAG添加剂促进了强大的有机/无机混合SEI的形成,改善了Zn2+脱溶动力学.
- 经过修改的阳极在0.5 mA cm-2.2下,在6500小时内表现出异常的循环稳定性.
- 实现了高平均库伦比效率 (99.6%在1 mA cm−2) 和在完整电池中延长循环稳定性 (高达2000个循环).
结论:
- 使用NAG开发的无混合动力SEI是高性能,成本效益和环保水性电池的有希望的战略.
- 这种方法有效地减轻了树突的形成,并提高了涂/脱落的可逆性.
- 这项研究为可持续的基于的储能系统的实际应用铺平了道路.
更多相关视频
07:55Elemental-sensitive Detection of the Chemistry in Batteries through Soft X-ray Absorption Spectroscopy and Resonant Inelastic X-ray Scattering
Published on: April 17, 2018
12.6K
07:45Electrophoretic Crystallization of Ultrathin High-performance Metal-organic Framework Membranes
Published on: August 16, 2018
9.9K
相关概念视频
03:12Batteries and Fuel Cells
26.7K
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...
26.7K
00:56Extraction: Advanced Methods
390
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...
390
01:17Ion Exchange
395
Ion exchange chromatography separates charged molecules from a solution by reversibly exchanging them with mobile, or 'active', ions associated with the oppositely charged stationary phase. This method can be used to separate ions, soften and deionize water, and purify solutions. The polymers comprising the ion-exchange column are high-molecular-weight and chemically stable polymers, crosslinked to be porous and essentially insoluble. They are also functionalized with either acidic or...
395