arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2412.02433cond-mat.mtrl-sci
收藏

锂负极界面不稳定性及超离子Li3InCl6和Li6PSCl5固态电解质稳定化的从头算研究

Ab initio Study on Lithium Anode Interface Instability and Stabilization of Superionic Li3InCl6 and Li6PS5Cl Solid Electrolytes

Cheng-Man Wang, Chao-Hsiang Hsu, Jing-Sen Yang, Ping-Chun Tsai

AI总结:

该研究通过从头算计算揭示了LIC-Li和LPSC-Li界面的不稳定性,发现LPSC-Li具有稳定界面相而LIC-Li没有,并系统评估了中间层材料,为全固态锂电池稳定界面的开发提供了理论指导。

摘要:

新兴的超离子导体Li3InCl6(LIC)和Li6PSCl5(LPSC)在全固态锂电池(ASSLBs)中作为固态电解质(SSEs)极具前景。然而,实验和从头算计算均观察到LIC和LPSC中不稳定的锂负极界面,而决定界面稳定性的界面相的形成仍不清楚。在本研究中,我们研究了LIC-Li和LPSC-Li界面及界面相的从头算稳定性。我们的从头算计算揭示,这两种界面在化学和电化学上均非热力学稳定。有趣的是,LPSC-Li具有稳定的界面相,而LIC-Li则没有。此外,我们系统评估了LIC-Li和LPSC-Li界面的中间层,并明确了这两种界面所需的中间层材料。这种对界面、界面相和中间层的从头算理解将有助于开发ASSLBs中各种稳定的界面。

英文摘要:

Emerging superionic conductors Li3InCl6 (LIC) and Li6PS5Cl (LPSC) are very promising for solid-state electrolytes (SSEs) in all-solid-state lithium batteries (ASSLBs). However, unstable lithium-anode interfaces in LIC and LPSC have been observed through experiments and ab initio calculations, while the interphases formed in determining interfacial stability remain unclear. In this study, we investigate the ab initio stability of LIC-Li and LPSC-Li interfaces and interphases. Our ab initio calculations revealed that both interfaces are not chemically or electrochemically thermodynamically stable. Interestingly, the LPSC-Li has a stable interphase, but the LIC-Li doesn't. Moreover, the interlayers were systematically evaluated for the LIC-Li and LPSC-Li interfaces, and the desired interlayer materials are clarified for the two interfaces. This ab initio understanding of the interfaces, interphases and interlayers would help the development of a variety of stable interfaces in ASSLBs.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑