纳入SEI的P块化合物使低温金属电池中的超稳定电池循环成为可能
Sike Xie1, Yujie Huang1, Yanjian Xie1
1School of Materials and Energy, Guangzhou Key Laboratory of Low-Dimensional Materials and Energy Storage Devices, Guangdong University of Technology, Guangzhou, 510006, P. R. China.
Advanced materials (Deerfield Beach, Fla.)
|December 5, 2025
概括
研究人员开发了一种新材料 (NiTe2@NC),用于稳定高能电池中的金属阳极. 这项创新防止了树的生长,并提高了电池的性能,使实用电池能够稳定循环和低温运行.
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:
- 金属阳极 (SMA) 对于高能量密度电池至关重要.
- 然而,SMA面临着诸如树生长和因体积膨胀和脆弱的固体电解质界面 (SEI) 的界面不稳定性等挑战.
研究的目的:
- 开发一种用于稳定金属阳极的新策略.
- 克服SMA中树形成和界面不稳定的局限性.
主要方法:
- 从N-doped碳空心微球 (NiTe2@NC) 上的NiTe2纳米晶体中在现场形成一个p块矩阵.
- 电化学激活以创建一个sodiophilic和导电接口.
- 对SEI层的表征和电化学性能评估.
主要成果:
- NiTe2@NC电极通过减少核化障碍和增强离子/电子传输,证明了统一的涂层.
- 形成了一个渐变的,富含无机的SEI层,改善了机械弹性和Na+动力学.
- 实现了特殊的循环 (1000个循环在1.0 mA cm-2/1.0 mAh cm-2,99.79%的库伦比效率).
- 采用Na4Fe3(PO4)2P2O7阴极的全电池显示出高容量保留率 (>在10.0°C的1200个循环后96.1%) 和出色的低温性能.
结论:
- 在现场建造的p块矩阵有效地稳定了金属阳极.
- 这种方法为设计稳定和高性能金属电池建立了新的范式.
- NiTe2@NC电极为实际的储能应用提供了显著的潜力.
相关概念视频
Batteries and Fuel Cells
30.7K
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...
30.7K
Formation of Complex Ions
25.6K
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...
25.6K
Ionic Bonding and Electron Transfer
48.5K
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.
48.5K


