在金属阳极上建造高性能固体电解质间相的等离子合电解质添加剂策略
Ping Liu1,2, Shenghui Shen3, Zhong Qiu1
1State Key Laboratory of Silicon Materials, Key Laboratory of Advanced Materials and Applications for Batteries of Zhejiang Province, and Department of Materials Science and Engineering, Zhejiang University, Hangzhou, 310027, P. R. China.
Advanced materials (Deerfield Beach, Fla.)
|June 5, 2024
概括
一个新的增强等离子体的电解质添加剂策略为金属阳极创建了一个强大的复合体固体电解质介相 (SEI). 这一创新显著提高了先进的金属电池的电池性能和寿命.
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
- 储能 储能 储能 储能 储能 储能
背景情况:
- 高性能金属阳极对于下一代电池至关重要.
- 开发稳定的固体电解质间相 (SEI) 层对于金属阳极的功能至关重要.
研究的目的:
- 开发一种新的策略,在金属阳极上制造高质量的复合材料SEI层.
- 为了提高金属电池的性能和稳定性,使用与等离子体合的电解质添加剂方法.
主要方法:
- 利用计算指导来选择二甲基二马酸盐 (DB) 作为电解质添加剂.
- 开发了一种结合等离子技术和DB添加剂战略,以构建混合SEI层.
- 描述了SEI的组成和特性,包括Li+亲和力和机械强度.
主要成果:
- 混合SEI层,包括内部LiBr/Li2CO3和外部LiBr/Li2CO3/有机化合物,促进了均的Li+沉积.
- 对称细胞表现出增强的循环稳定性 (1200小时) 和高的库伦比效率 (99.51%).
- 在300个循环后,全电池实现了81.7%的容量保留,袋式电池达到664Wh L-1体积特能.
结论:
- 与等离子体合的电解质添加剂策略有效地修改了SEI,以提高金属阳极性能.
- 这种方法为在储能应用中使用等离子技术进行先进的金属阳极制造提供了新的见解.
更多相关视频
相关概念视频
Formation of Complex Ions
23.6K
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...
23.6K
Electrodeposition
625
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...
625
Extraction: Advanced Methods
446
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...
446
Ion Exchange
577
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...
577


