建筑连续混合离子和电子导电合金负电极,用于快速充电全固态电池
Tao Liu1,2, Youlong Sun2,3,4, Yantao Wang2
1College of Chemistry, Chemical Engineering and Materials Science, Shandong Normal University, Jinan, China.
Nature communications
|December 16, 2025
概括
一个新的InSnBi合金电极通过防止结构损坏和树生长来增强电动汽车固态电池. 这一突破使得高容量和快速充电成为可能,这对于下一代电动汽车至关重要.
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:
- 用于电动汽车 (EV) 的全固态电池 (ASSLB) 需要高的特定功率.
- 在ASSLB中厚厚的负电极面临着诸如脆弱的导电网络和状物生长等挑战,限制了性能.
- 合金过程中的体积变化和高电流密度加剧了这些问题.
研究的目的:
- 为ASSLBs开发一种新的三元合金负电极,克服厚电极的局限性.
- 为了提高机械强度和电化学稳定性,用于高功率的电动汽车应用.
- 为了实现ASSLBs的快速充电和长周期寿命.
主要方法:
- 一个In0.38Sn0.33Bi0.29三元合金负电极的制造和表征.
- 合金电极的电化学测试,包括容量,临界电流密度和循环性能.
- 组装和评估In0.38Sn0.33Bi0.29
- 验证使用大格式袋式电池进行快速充电评估.
主要成果:
- In0.38Sn0.33Bi0.29电极显示出混合离子电子导电连续体,在合金过程中稳定网络.
- 逐步相位形成提供机械强度,减轻压力并最大限度地减少裂传播.
- 实现了高容量 (~724 mAh g-1) 和临界电流密度 (150 mA cm-2 在5.0 mAh cm-2).
- 在4.0°C的1300个循环中,全电池保持了87.5%的容量,能量密度高 (在5.0°C时为203.1 Wh kg-1和670.6 Wh L-1).
- 大尺寸袋式电池的快速充电能力得到证实.
结论:
- 三元合金电极In0.38Sn0.33Bi0.29有效地解决了ASSLBs中的机械不稳定性和树生长问题.
- 开发的电极设计可实现高特异功率,快速充电和稳定的循环,适合电动汽车应用.
- 设计原则可转移到其他负电极材料,用于先进的固态电池开发.
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
Ions and Ionic Charges
78.2K
In ordinary chemical reactions, the nucleus — which contains the protons and neutrons of each atom and thus identifies the element — remains unchanged. Electrons, however, can be added to atoms by transfer from other atoms, lost by transfer to other atoms, or shared with other atoms. The transfer and sharing of electrons among atoms govern the chemistry of the elements. During the formation of some compounds, atoms gain or lose electrons to form electrically charged particles called...
78.2K
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
Ionic Compounds: Formulas and Nomenclature
85.8K
An element composed of atoms that readily lose electrons (a metal) can react with an element composed of atoms that readily gain electrons (a nonmetal) to produce ions through complete electron transfer. The compound formed by this transfer is stabilized by the electrostatic attractions (ionic bonds) between the oppositely charged ions.
85.8K


