"纳米骨"Si-SiO/C阳极向高度稳定的离子电池发展
Xiang Guan1, Yang Zhang1, Ian A Kinloch1
1National Graphene Institute, Henry Royce Institute, and Department of Materials, University of Manchester, Manchester M13 9PL, U.K.
ACS applied materials & interfaces
|February 4, 2025
概括
一种新的碳纳米管"纳米骨架"增强了离子电池的阳极,通过减轻体积膨胀和副作用来提高稳定性和容量保留.
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
- 纳米技术纳米技术
背景情况:
- 阳极为离子电池提供了高的理论容量,但由于体积膨胀和脆弱的固体电解质介面 (SEI) 层形成,其循环稳定性不佳.
- 这种不稳定性导致副作用,电解质消耗和容量衰减,限制了实际应用.
研究的目的:
- 为了设计一个强大的碳纳米管 (CNT) 支持.
主要方法:
- 一个小小的东西.
- 该结构的特征是使用电子显微镜和电化学技术.
- 在半细胞和NMC111全细胞中评估了性能.
主要成果:
- 这是CNT的CNT.
- 最佳阳极在200mA·g-1下显示出918mAh·g-1的高可逆容量,在300个循环后保持74%的容量.
- 在500个循环 (72%的保留) 后,NMC111全细胞在100mA·g-1下保留了71 mAh·g-1.
结论:
- 这是CNT的CNT.
- 这种方法为为下一代离子电池开发高性能和稳定的基于的阳极提供了有前途的战略.
相关概念视频
02:48Ionic Bonding and Electron Transfer
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.
03:12Batteries and Fuel Cells
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...