全固态Li-S电池的无形矩阵中实现纳米化Li2S的通用固体反应
Xiaoge Hao1,2, Zhi Liang Dong2, Jiabin Ma3
1Eastern Institute for Advanced Study, Ningbo Institute of Digital Twin, Eastern Institute of Technology, Zhejiang Key Laboratory of All-Solid-State Battery, Ningbo Key Laboratory of All-Solid-State Battery Eastern Institute of Technology, Ningbo, Zhejiang 315200, P.R. China.
Journal of the American Chemical Society
|August 30, 2025
概括
研究人员开发了一种使用纳米级硫化 (Li2S) 在LiFeS2矩阵中的全固态 (Li-S) 电池的新型阴极,提高稳定性和性能.
科学领域:
- 材料科学
- 电化学
- 能量储存
背景情况:
- 硫化 (Li2S) 对于全固态硫 (Li-S) 电池至关重要.
- 挑战包括低导电性和低活性材料的利用.
研究的目的:
- 设计一种新的阴极材料,以提高Li-S电池的性能.
- 解决 Li2S 阴极的导电性和利用问题.
主要方法:
- 开发了一个纳米尺寸Li2S嵌入无形LiFeS2矩阵 (92Li2S@8LiFeS2).
主要成果:
- 92Li2S@8LiFeS2阴极表现出极好的循环稳定性,在320个循环后保持超过99%的容量.
- 实现了13.2 mAh/cm2的面积容量,活性物质含量为48%,质量负荷为19.1 mg/cm2.
结论:
- LiFeS2矩阵增强电子/离子导电性,并提供催化效应.
- 纳米化Li2S缩短了离子/电子传输距离,提高了电池的性能.
相关概念视频
02:18Network Covalent Solids
14.5K
Network covalent solids contain a three-dimensional network of covalently bonded atoms as found in the crystal structures of nonmetals like diamond, graphite, silicon, and some covalent compounds, such as silicon dioxide (sand) and silicon carbide (carborundum, the abrasive on sandpaper). Many minerals have networks of covalent bonds.
To break or to melt a covalent network solid, covalent bonds must be broken. Because covalent bonds are relatively strong, covalent network solids are typically...
To break or to melt a covalent network solid, covalent bonds must be broken. Because covalent bonds are relatively strong, covalent network solids are typically...
14.5K
02:42Ionic Crystal Structures
14.7K
Ionic crystals consist of two or more different kinds of ions that usually have different sizes. The packing of these ions into a crystal structure is more complex than the packing of metal atoms that are the same size.
Most monatomic ions behave as charged spheres, and their attraction for ions of opposite charge is the same in every direction. Consequently, stable structures for ionic compounds result (1) when ions of one charge are surrounded by as many ions as possible of the opposite...
Most monatomic ions behave as charged spheres, and their attraction for ions of opposite charge is the same in every direction. Consequently, stable structures for ionic compounds result (1) when ions of one charge are surrounded by as many ions as possible of the opposite...
14.7K