在双封装上具有高能量密度的坚固的基于的阳极
Wenhui Lai1, Jong Hak Lee2, Zhen Yuan Yeo3
1Department of Material Science and Engineering, National University of Singapore, Singapore 117575, Singapore.
ACS nano
|October 22, 2025
概括
研究人员开发了一种用于离子电池中的阳极的双策略. 这种方法增强了稳定性并抑制了体积膨胀,使商业电池能够具有高能量密度和稳定的循环.
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.
- 体积膨胀和弱接口接触限制阳极的实际应用.
- 结构的不稳定性源于电池循环过程中的大体积变化.
研究的目的:
- 为阳极开发一种新的双封装策略.
- 为了提高阳极的接口接触和结构稳定性.
- 通过先进的特征化技术来研究潜在的机制.
主要方法:
- 在和碳外之间构建Si-C化学键.
- 在碳外之间建立C-C层间的结合.
- 使用机器学习增强传输电子显微镜进行界面分析.
主要成果:
- 双接机制显著提高了碳的机械强度.
- 通过Si-C债券确保了持续的电气连接,减轻了接口不稳定性.
- 在300个循环后,体积膨胀被抑制到低于12%.
- 完整电池在稳定的循环过程中实现了高能量密度576Wh kg-1 .
结论:
- 双战略有效地解决了阳极的不稳定性.
- 这种方法为高性能电池的商业化铺平了道路.
- 这些发现激发了对储能中强大的阳极材料的新设计.
更多相关视频
10:27Simultaneous Multi-surface Anodizations and Stair-like Reverse Biases Detachment of Anodic Aluminum Oxides in Sulfuric and Oxalic Acid Electrolyte
Published on: October 5, 2017
7.7K
09:18Metal-Assisted Electrochemical Nanoimprinting of Porous and Solid Silicon Wafers
Published on: February 8, 2022
4.5K
相关概念视频
The Energies of Atomic Orbitals
In an atom, the negatively charged electrons are attracted to the positively charged nucleus. In a multielectron atom, electron-electron repulsions are also observed. The attractive and repulsive forces are dependent on the distance between the particles, as well as the sign and magnitude of the charges on the individual particles. When the charges on the particles are opposite, they attract each other. If both particles have the same charge, they repel each other.
Intermolecular Forces
Atoms and molecules interact through bonds (or forces): intramolecular and intermolecular. The forces are electrostatic as they arise from interactions (attractive or repulsive) between charged species (permanent, partial, or temporary charges) and exist with varying strengths between ions, polar, nonpolar, and neutral molecules. The different types of intermolecular forces are ion–dipole, dipole–dipole, hydrogen bonds, and dispersion; among these, dipole–dipole, hydrogen bonds, and dispersion...
Energy of a Satellite in a Circular Orbit
Thousands of artificial satellites orbit the Earth every day at various distances from the Earth. Satellites that orbit the Earth below an altitude of 1,600 km are considered to be orbiting in low-Earth orbit (LEO). Research satellites and Earth observation satellites are usually placed in LEO, and mostly orbit the Earth in elliptical orbits. Navigation satellites are placed in medium-Earth orbit (MEO), ranging from 2,000 km to 36,000 km from the surface of the Earth. Meanwhile, communication...
Potential Due to a Polarized Object
A neutral atom consists of a positively charged nucleus surrounded by a negatively charged electron cloud. When placed in an external electric field, the external electric force pulls the electrons and nucleus apart, opposite to the intrinsic attraction between the nucleus and the electrons. The opposing forces balance each other with a slight shift between the center of masses of the nucleus and the electron cloud, resulting in a polarized atom. On the other hand, a few molecules, like water,...
Schottky Barrier Diode
Schottky barrier diodes are specialized semiconductor devices characterized by their unique construction. This construction involves combining a metal layer with a moderately doped n-type semiconductor material. This combination leads to the formation of a Schottky barrier, a pivotal element that defines the diode's operational characteristics. The core functionality of Schottky barrier diodes is their capacity to allow current to flow in only one direction due to their distinctive...
The Electrical Double Layer
In the region where two bulk phases meet, an intricate electric charge distribution arises due to charge transfer, ion adsorption, molecular orientation, and charge distortion. This complex distribution is commonly referred to as the electrical double layer.When a solid electrode interfaces with ions in an electrolyte solution, the speed of electron transfer dictates the rates of oxidation and reduction. The electrode acquires a charge through the escape of atoms into the solution as cations or...
