View in EDS

Understanding the impact of Li2CO3 distribution within solid electrolyte interphases on lithium metal via thermal conditioning.

Saved in:
Bibliographic Details
Title: Understanding the impact of Li2CO3 distribution within solid electrolyte interphases on lithium metal via thermal conditioning.
Authors: Nogales, Paul Maldonado1 (AUTHOR), Lee, Sangyup1 (AUTHOR), Yang, Seunga1 (AUTHOR), Jeong, Soon-Ki1,2 (AUTHOR) hamin611@sch.ac.kr
Source: Electrochimica Acta. Nov2024, Vol. 503, pN.PAG-N.PAG. 1p.
Subjects: Solid electrolytes, Heat treatment, Polyelectrolytes, Carbon dioxide, Dendritic crystals, Superionic conductors
Abstract: The formation of a solid electrolyte interphase (SEI) is crucial for the performance and safety of Li metal batteries (LMBs). The SEI consists of various compounds that are assumed to prevent electrolyte decomposition and dendrite growth. Among these constituents, Li 2 CO 3 has a contentious position; some studies stated that it is a beneficial component, whereas others viewed it as an impurity. This study investigated the influence of strategic heat treatments on the distribution of Li 2 CO 3 formed in the SEI of Li metal. These treatments affect the cycling performance of Li/LiCoO 2 cells, as evidenced by the differences in cycle life and capacity. In particular, the study showed that samples heat-treated at higher temperatures generally exhibited enhanced performances, illustrating the impact of heat treatment on SEI quality. The quality of the SEI, which depends on the Li 2 CO 3 formation model (solid electrolyte interface layer or a solid polymer electrolyte layer), varies depending on the applied heat treatment. The samples heat-treated at 120 °C followed the solid polymer electrolyte layer model, resulting in the mosaic-style formation of Li 2 CO 3. This intricate pattern provides superior mechanical stability compared with that of a plain layer-type structure and can be used to develop potential strategies for the enhancement of the cycling stability and overall longevity of LMBs. [Display omitted] [ABSTRACT FROM AUTHOR]
Copyright of Electrochimica Acta is the property of Pergamon Press - An Imprint of Elsevier Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
Description
Abstract:The formation of a solid electrolyte interphase (SEI) is crucial for the performance and safety of Li metal batteries (LMBs). The SEI consists of various compounds that are assumed to prevent electrolyte decomposition and dendrite growth. Among these constituents, Li 2 CO 3 has a contentious position; some studies stated that it is a beneficial component, whereas others viewed it as an impurity. This study investigated the influence of strategic heat treatments on the distribution of Li 2 CO 3 formed in the SEI of Li metal. These treatments affect the cycling performance of Li/LiCoO 2 cells, as evidenced by the differences in cycle life and capacity. In particular, the study showed that samples heat-treated at higher temperatures generally exhibited enhanced performances, illustrating the impact of heat treatment on SEI quality. The quality of the SEI, which depends on the Li 2 CO 3 formation model (solid electrolyte interface layer or a solid polymer electrolyte layer), varies depending on the applied heat treatment. The samples heat-treated at 120 °C followed the solid polymer electrolyte layer model, resulting in the mosaic-style formation of Li 2 CO 3. This intricate pattern provides superior mechanical stability compared with that of a plain layer-type structure and can be used to develop potential strategies for the enhancement of the cycling stability and overall longevity of LMBs. [Display omitted] [ABSTRACT FROM AUTHOR]
ISSN:00134686
DOI:10.1016/j.electacta.2024.144834