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Early Stage Li Plating by Liquid Phase and Cryogenic Transmission Electron Microscopy

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Title
Early Stage Li Plating by Liquid Phase and Cryogenic Transmission Electron Microscopy
Author(s)
Hayoung Park; Yonggoon Jeon; Woo Jun Chung; Yuna Bae; Jihoon Kim; Hayeon Baek; Jungwon Park
Publication Date
2023-01
Journal
ACS Energy Letters, v.8, no.1, pp.715 - 721
Publisher
American Chemical Society
Abstract
Li metal anodes are among the most promising options for next-generation batteries, exhibiting the highest theoretical capacity. However, irregular Li electrodeposition, which raises safety concerns, is a major obstacle in practical applications. Therefore, a fundamental understanding of the beginning phases of Li plating, such as nucleation and early growth, which have a decisive influence on the dendritic growth of Li, is essential. In this study, we investigated the early stage of Li plating at the single-particle level and its correlation with the solid-electrolyte interphase (SEI) using in situ liquid phase transmission electron microscopy (TEM) and cryogenic TEM. We observed contrasting nucleation dynamics and particle growth patterns in two electrolytes (1 M LiPF6 in ethylene carbonate/diethyl carbonate and 1 M LiTFSI in 1,3-dioxolane/dimethoxy ethane), which originate from different chemical and physical properties of the SEIs. Based on our findings, we propose a mechanism of nucleation and initial growth of Li dictated by the SEI. © 2022 American Chemical Society.
URI
https://pr.ibs.re.kr/handle/8788114/13153
DOI
10.1021/acsenergylett.2c02387
ISSN
2380-8195
Appears in Collections:
Center for Nanoparticle Research(나노입자 연구단) > 1. Journal Papers (저널논문)
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