1,1-二乙基乙烷作为锂硫电池的界面稳定溶剂

IF 1.7 4区 化学 Bulletin of the Korean Chemical Society Pub Date : 2023-11-16 DOI:10.1002/bkcs.12796
Juhwi Park, Tae-Hyun Kim, Taeeun Yim
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引用次数: 0

摘要

锂硫电池(LSBs)在过去的几年中获得了极大的关注,然而,其固有的局限性,如锂阳极的界面稳定性差和多硫化物的严重溶解,被认为是阻碍这些电池进入商业市场的瓶颈。本研究提出了一种经缩醛官能团修饰的1,1-二氧乙烷(DEE)作为电解质助溶剂,以弥补lsb电极材料的局限性。在Li/Li对称电池中,DEE共溶剂表现出稳定的循环行为,而具有基线电解质的电池即使在650 h后也表现出快速增加的极化行为。在LSB电池中,与基线电解质(49.8%)相比,含有50% DEE的电解质表现出最高的循环保留率(65.0%),因为它有效地保护了锂阳极的界面,但也抑制了多硫化物的溶解。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

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1,1-Diethoxyethane as an interfacial-stabilizing solvent for lithium–sulfur batteries

Lithium–sulfur batteries (LSBs) have gained remarkable attention over the past several years, however, their inherent limitations, such as the poor interfacial stability of their Li anodes and the severe dissolution of polysulfide, are regarded as bottlenecks that prevent these batteries from entering commercial markets. In this study, a 1,1-diethoxyethane (DEE), which has been functionalized with acetal groups, is proposed as an electrolyte cosolvent to complement the limitations of the electrode materials of LSBs. In Li/Li symmetric cells, the DEE cosolvent exhibited stable cycling behavior, whereas the cell with the baseline electrolyte exhibited rapidly increasing polarization, even after 650 h. In LSB cells, the electrolyte that contains 50% DEE exhibits the highest cycling retention (65.0%) compared to the baseline electrolyte (49.8%) because it effectively protects the interface of the Li anode, but also suppresses the dissolution of polysulfide species.

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来源期刊
Bulletin of the Korean Chemical Society
Bulletin of the Korean Chemical Society Chemistry-General Chemistry
自引率
23.50%
发文量
182
期刊介绍: The Bulletin of the Korean Chemical Society is an official research journal of the Korean Chemical Society. It was founded in 1980 and reaches out to the chemical community worldwide. It is strictly peer-reviewed and welcomes Accounts, Communications, Articles, and Notes written in English. The scope of the journal covers all major areas of chemistry: analytical chemistry, electrochemistry, industrial chemistry, inorganic chemistry, life-science chemistry, macromolecular chemistry, organic synthesis, non-synthetic organic chemistry, physical chemistry, and materials chemistry.
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