在长寿命离子电池的形成过程中阐明电极-电解质介面的形成
Yingfei Li1, Yanqiong Li1, Junshuang He1
1Department of Chemistry, Zhejiang University, Hangzhou 310027, China.
ACS applied materials & interfaces
|June 25, 2025
概括
离子电池 (NIB) 是有前途的,但面临着稳定性问题. 这项研究表明,高压和电流密度会破坏保护界面,降低性能. 优化的条件显著提高了NIB自行车的稳定性和寿命.
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:
- 离子电池 (NIB) 是一个经济高效和可持续的储能替代品.
- 关键的挑战包括循环稳定性和电化学性能差,与不稳定的固体电解质介面 (SEI) 和阴极电解质介面 (CEI) 相关.
- 了解SEI/CEI形成机制对于NIB进步至关重要.
研究的目的:
- 系统地研究压力和电流密度对NIB中SEI/CEI形成的影响.
- 阐明这些因素如何影响界面稳定性和电化学性能.
- 为了确定最佳的形成条件,以改善NIB循环稳定性.
主要方法:
- 在不同的外部压力和电流密度下,在氧化物阴极和硬碳阳极上研究SEI/CEI形成.
- 分析了这些参数对界面离子扩散和电池循环性能的影响.
- 在优化形成条件下评估了Na-ion袋细胞的长期循环稳定性.
主要成果:
- 发现增加的外部压力和电流密度阻碍了均和稳定的SEI/CEI形成.
- 这些非理想的条件增加了Na+界面扩散障碍,导致循环稳定性降低.
- 优化的形成条件使离子袋细胞在1°C下650个周期后保持92.5%的容量.
结论:
- 外部压力和电流密度显著影响SEI/CEI形成和NIB性能.
- 优化这些形成参数对于提高界面稳定性和电池寿命至关重要.
- 这项研究为通过改进的电极-电解质接口管理来推进NIB技术提供了宝贵的见解.
更多相关视频
10:03Characterization of Electrode Materials for Lithium Ion and Sodium Ion Batteries Using Synchrotron Radiation Techniques
Published on: November 11, 2013
25.6K
11:04Synthesis of Ionic Liquid Based Electrolytes, Assembly of Li-ion Batteries, and Measurements of Performance at High Temperature
Published on: December 20, 2016
13.1K
相关概念视频
Ionic Bonding and Electron Transfer
42.5K
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.
42.5K
Ionic Bonds
122.1K
Overview
When atoms gain or lose electrons to achieve a more stable electron configuration they form ions. Ionic bonds are electrostatic attractions between ions with opposite charges. Ionic compounds are rigid and brittle when solid and may dissociate into their constituent ions in water. Covalent compounds, by contrast, remain intact unless a chemical reaction breaks them.
Opposing Charges Hold Ions Together in Ionic Compounds
Ionic bonds are reversible electrostatic interactions between ions...
When atoms gain or lose electrons to achieve a more stable electron configuration they form ions. Ionic bonds are electrostatic attractions between ions with opposite charges. Ionic compounds are rigid and brittle when solid and may dissociate into their constituent ions in water. Covalent compounds, by contrast, remain intact unless a chemical reaction breaks them.
Opposing Charges Hold Ions Together in Ionic Compounds
Ionic bonds are reversible electrostatic interactions between ions...
122.1K
Formation of Complex Ions
24.0K
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...
24.0K
Electrolysis
27.3K
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...
27.3K
Batteries and Fuel Cells
28.0K
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...
28.0K
The Born-Haber Cycle
22.4K
Lattice Energy
22.4K
