稳定化物电解质对金属的稳定,用于全固态金属电池的自我限制层
Guangwen Zhang1, Deyuan Li1, Dongfang Yu2
1Tianjin Key Laboratory of Advanced Carbon and Electrochemical Energy Storage School of Chemical Engineering and Technology, Tianjin University, Tianjin 300350, China.
ACS nano
|April 11, 2025
概括
一种新型的自我限制层 (SLL) 稳定了全固态金属电池 (ASSLMB) 中的金属阳极的化物固态电解质,防止了副作用,以提高性能.
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
- 电池技术 电池技术
背景情况:
- 化物固态电解质 (SSEs) 为所有固态电池提供高离子导电性和电压稳定性.
- 在化物SSE/金属阳极接口的化学不稳定性限制了它们在高能量密度全固态金属电池 (ASSLMB) 中的使用.
研究的目的:
- 开发化物SSEs的保护接口层,以确保与金属阳极的化学稳定性.
- 通过减轻有害的副作用来提高ASSLMB的性能和循环寿命.
主要方法:
- 使用InF3和Li2ZrCl6 (LZC) 制造一个自我限制层 (SLL).
- 在LZC/Li金属阳极接口上形成一个富含LiF的被动化层.
- 对金属对称电池和ASSLMB的电化学测试.
- 密度函数理论 (DFT) 计算和循环后表征.
主要成果:
- 该SLL有效地抑制化物SSE和金属阳极之间的副作用反应.
- 金属对称细胞表现出超过3000小时的稳定循环.
- 带有SLL的ASSLMB在0.5°C的100个循环中实现了99.2%的容量保留,在250个循环后在2°C时达到83.5%.
- DFT和实验数据证实了保护性LiF丰富层的形成.
结论:
- 开发的SLL为化物SSE/金属阳极接口提供了有效的动力被动化.
- 这一策略使得稳定化物SSEs在高性能ASSLMB中能够使用.
- 自限接口保护是推进ASSLMB技术的可行方法.
更多相关视频
相关概念视频
Ionic Bonding and Electron Transfer
39.8K
Ions are atoms or molecules bearing an electrical charge. A cation (a positive ion) forms when a neutral atom loses one or more electrons from its valence shell, and an anion (a negative ion) forms when a neutral atom gains one or more electrons in its valence shell. Compounds composed of ions are called ionic compounds (or salts), and their constituent ions are held together by ionic bonds: electrostatic forces of attraction between oppositely charged cations and anions.
39.8K
Acid Halides to Alcohols: LiAlH4 Reduction
2.6K
Acid halides are reduced to alcohols in the presence of a strong reducing agent like lithium aluminum hydride.
The mechanism proceeds in three steps. First, the nucleophilic hydride ion attacks the carbonyl carbon of the acid halide to form a tetrahedral intermediate. Next, the carbonyl group is re-formed, and the halide ion departs as a leaving group, generating an aldehyde. A second nucleophilic attack by the hydride yields an alkoxide ion, which, upon protonation, gives a primary alcohol as...
The mechanism proceeds in three steps. First, the nucleophilic hydride ion attacks the carbonyl carbon of the acid halide to form a tetrahedral intermediate. Next, the carbonyl group is re-formed, and the halide ion departs as a leaving group, generating an aldehyde. A second nucleophilic attack by the hydride yields an alkoxide ion, which, upon protonation, gives a primary alcohol as...
2.6K
Complexation Equilibria: Factors Influencing Stability of Complexes
301
In complexation reactions, metal cations are the electron pair acceptors, and the ligands are the electron pair donors. The stability of the metal complexes depends primarily on the complexing ability of the central metal ion and the nature of the ligands. Generally, the complexing ability of the metal ion depends on the size and charge of the ion. As the metal ion size increases, the stability of the metal complexes decreases, provided that the valency of the metal ion and the ligands remain...
301
Electrolyte and Nonelectrolyte Solutions
61.9K
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.
61.9K
Batteries and Fuel Cells
26.8K
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...
26.8K
Electrolysis
25.7K
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...
25.7K


