具有平衡导电性的补充阳离子-阴离子调节电解质,用于高性能全固态金属电池
Zhiying He1, Tao Yu1, Kaiwen Li1
1Center of Energy Storage Materials & Technology, College of Engineering and Applied Sciences, Jiangsu Key Laboratory of Artificial Functional Materials, National Laboratory of Solid-State Microstructures and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, P. R. China.
研究人员开发了一种用于高能金属电池的新型 argyrodite 固态电解质. 这种电解质增强了离子运输,并与金属形成稳定的接口,使电池具有长期和高效的性能.
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
- 固态化学 固态化学
背景情况:
- 高特异能全固态电池需要固态电解质,具有超离子导电性和与金属阳极的良好兼容性.
- 当前电解质经常面临界面稳定性和离子传输限制的挑战,阻碍了电池的性能和寿命.
研究的目的:
- 设计和开发一种新型的 argyrodite 型固态电解质,具有增强的离子传输和与金属的卓越接口兼容性.
- 通过合作的阴离子调节策略,研究界面稳定机制.
- 在金属对称细胞和全细胞中评估开发的电解质的电化学性能.
主要方法:
- 使用合作性阴离子调节策略,合成定制的阿吉罗迪特型固态电解质.
- 在电解质和金属之间的反应的现场界面分析.
- 电化学表征包括在Li//Li对称细胞和Li//LiNi0.8Co0.1Mn0.1O2全细胞中的循环稳定性测试.
主要成果:
- 一个强大的阳极接口通过金属与调节电解质的现场反应自发形成,涉及-Mo合金和3N形成.
- 调制的电解质在0.5mA cm-2.2的Li//Li对称细胞中表现出超过3100小时的稳定循环.
- //LiNi0.8Co0.1Mn0.1O2电池在4C的1500个循环中表现出75%的容量保留,平均库伦比效率为99.99%.
结论:
- 合作性阴离子调节策略在设计固态电解质方面是有效的,具有快速的Li + 传输和出色的界面兼容性.
- 开发的 argyrodite 电解质可使金属阳极运行稳定,抑制寄生反应并促进均的 Li 剥离/.
- 这项工作为开发高性能,寿命长的全固态金属电池提供了有前途的途径.
更多相关视频
11:04Synthesis of Ionic Liquid Based Electrolytes, Assembly of Li-ion Batteries, and Measurements of Performance at High Temperature
Published on: December 20, 2016
07:20Screening of Coatings for an All-Solid-State Battery Using In Situ Transmission Electron Microscopy
Published on: January 20, 2023
相关概念视频
Metallic Solids
All metallic solids exhibit high thermal and electrical conductivity, metallic luster, and malleability....
Batteries and Fuel Cells
Bonding in Metals
Electrolytes: van't Hoff Factor
The colligative properties of a solution depend only on the number, not on the identity, of solute species dissolved. The concentration terms in the equations for various colligative properties (freezing point depression, boiling point elevation, osmotic pressure) pertain to all solute species present in the solution. Nonelectrolytes dissolve physically without dissociation or any other accompanying process. Each molecule that dissolves yields one...
π Molecular Orbitals of the Allyl Cation and Anion
Theory of Metallic Conduction
In this theory, Newton's second law of motion is used to determine the acceleration of an electron in the presence of an applied electric field. Then, its velocity is expressed via this acceleration.
An electron moves through the crystal, containing positive ions,...
