在金属电池中构建人工接口作为Li阳极和NCM阴极的双功能促进器
Huayu Huang1, Shishi Liu1, Yuxiang Xie1
1State Key Laboratory of Physical Chemistry of Solid Surfaces and Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China.
Journal of the American Chemical Society
|November 1, 2024
概括
接口工程提高了金属电池的性能. 一个新的混合人工接口提高了循环性,并抑制了树突,使得在高电压和高温下稳定运行.
科学领域:
- 材料科学
- 电化学
- 电池技术
背景情况:
- 金属电池 (LMB) 在可循环和树形成方面面临挑战,这阻碍了实际应用.
- 开发稳定的接口对于克服LMB的这些局限性至关重要.
研究的目的:
- 设计用于阳极的混合人工接口以提高电池性能.
- 调查接口在促进均沉积和增强稳定性的作用.
主要方法:
- 使用光控制自由基聚合 (光CRP) 在阳极上制造混合接口 (PEGDA-HFMBA@HFMBA-FEMC).
- 界面结构和组成的特征.
- 使用工程界面对Li/NCM811全电池进行电化学测试.
主要成果:
- 混合接口由一个灵活的内部层 (PEGDA-HFMBA) 和一个富含LiF的外部层 (HFMBA-FEMC) 组成.
- 接口促进了均的电沉积,并在现场形成了强大的阴极电解质接口 (CEI).
- 带有混合接口的Li/NCM811电池显著改善了循环性 (在400个循环后保持81.8%),并在4.5V和45°C下稳定运行.
结论:
- 拟议的接口工程战略有效地解决了金属电池的关键问题.
- 混合人工接口提高了LMB的稳定性和寿命,为实际应用铺平了道路.
相关概念视频
Batteries and Fuel Cells
27.0K
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...
27.0K
Biasing of P-N Junction
431
The operation of a p-n junction diode involves various biasing conditions, including forward bias, reverse bias, and equilibrium.
In equilibrium, no external voltage is applied across the p-n junction. The depletion region is formed at the junction interface due to the diffusion of carriers, which leaves behind charged dopants, acceptors on the p-side, and donors on the n-side. These immobile charges create an electric field that prevents further diffusion of carriers. The related energy band...
In equilibrium, no external voltage is applied across the p-n junction. The depletion region is formed at the junction interface due to the diffusion of carriers, which leaves behind charged dopants, acceptors on the p-side, and donors on the n-side. These immobile charges create an electric field that prevents further diffusion of carriers. The related energy band...
431


