固体电解质界面在/硫化物电解质界面的形成过程在全固态离子电池模型中
Sho Asano1, Jun-Ichi Hata1, Kenta Watanabe1
1Department of Chemical Science and Engineering, School of Materials and Chemical Technology, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8501, Japan.
ACS applied materials & interfaces
|February 5, 2024
概括
在第一个循环中,全固态电池的阳极上形成了一个新的固体电解质介相 (SEI). 这种SEI层使阳极能够稳定循环,这对电池性能至关重要.
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
- 电池技术 电池技术
背景情况:
- 阳极为下一代电池提供高容量,但周期稳定性不佳.
- 了解界面反应是提高全固态电池 (ASSB) 阳极性能的关键.
研究的目的:
- 为了研究ASSB中/固体硫化物电解质接口的电化学反应.
- 描述阳极上固体电解质介相 (SEI) 的形成和特性.
主要方法:
- 使用正弧等离子沉积制造模型Si/硫化物电解质接口.
- 使用硬X射线光电子光谱和中子反射计进行分析.
主要成果:
- 准备了一个厚的膜,粗度小于1nm.
- 最初的 (解) 合金是有限的,但随后发生了稳定的循环.
- 一个由Li2S,SiS2和P2S5玻璃组成的接口层在第一个周期中形成.
- 这层作为一种导电,电子绝缘的SEI,使可逆循环.
结论:
- 这项研究阐明了Si/Li3PS4接口上的电化学过程.
- 形成的SEI层对于ASSB中的阳极的激活和稳定至关重要.
- 对SEI结构和属性的洞察力可以指导高性能ASSB的开发.
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