Sulfinyl-functionalized fluorinated imide anions for ionic liquids and battery electrolytes

IF 1.7 4区化学 Q3 CHEMISTRY, INORGANIC & NUCLEAR

Journal of Fluorine Chemistry Pub Date : 2025-04-01 DOI:10.1016/j.jfluchem.2025.110426

Weican Hu , Xingxing Wang , Wu Hao, Pu Li, Wenfang Feng, Zhibin Zhou, Heng Zhang

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Abstract

To expediate the development of ionic liquids (ILs) as electrolyte materials for battery application, an adequate correlation between chemical structures of ILs and their inherent properties is essential. Herein, a series of ILs containing sulfinyl-functionalized fluorinated imide anions with a lower valence state sulfur [i.e., S(IV)] are synthesized and suggested as electrolyte candidates for battery use. Our results show that structural modifications of the sulfinyl-functionalized fluorinated imide anions allow precise control of the physical and electrochemical properties of the corresponding ILs, including thermal properties, transport behaviors, and electrochemical stability. Replacing classic sulfonyl group (–SO₂–) with sulfinyl moiety (–SO–) affords ILs with higher structural flexibility, and stronger resistance towards crystallization. The incorporation of longer perfluoroalkyl functionalities slightly increases the oxidative tolerance of the ILs with sulfinyl-functionalized fluorinated imide anions, which may allow more positive participation in building the electrode-electrolyte interface. The present work brings new opportunities for customizing IL-based electrolytes for the conversion-type electrode materials with lower working potentials.

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离子液体和电池电解质用亚砜基功能化氟亚胺阴离子

为了加速离子液体作为电池电解质材料的发展，离子液体的化学结构与其固有性质之间的充分关联是至关重要的。本文合成了一系列含有低价态硫（即S(IV)）的亚砜基功能化氟亚胺阴离子的il，并建议将其作为电池使用的电解质候选物。我们的研究结果表明，对亚酰基功能化氟化亚胺阴离子的结构修饰可以精确控制相应il的物理和电化学性能，包括热性能、输运行为和电化学稳定性。用亚砜基部分（- so -）取代传统的磺酰基（- so2 -），使il具有更高的结构柔韧性和更强的抗结晶性。长全氟烷基官能团的加入略微增加了具有亚砜基官能团的氟亚胺阴离子的il的氧化耐受性，这可能允许更积极地参与建立电极-电解质界面。本研究为低功电位转换型电极材料定制基于il的电解质提供了新的机会。

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来源期刊

Journal of Fluorine Chemistry 化学-无机化学与核化学

CiteScore

3.80

自引率

10.50%

发文量

审稿时长

33 days

期刊介绍： The Journal of Fluorine Chemistry contains reviews, original papers and short communications. The journal covers all aspects of pure and applied research on the chemistry as well as on the applications of fluorine, and of compounds or materials where fluorine exercises significant effects. This can include all chemistry research areas (inorganic, organic, organometallic, macromolecular and physical chemistry) but also includes papers on biological/biochemical related aspects of Fluorine chemistry as well as medicinal, agrochemical and pharmacological research. The Journal of Fluorine Chemistry also publishes environmental and industrial papers dealing with aspects of Fluorine chemistry on energy and material sciences. Preparative and physico-chemical investigations as well as theoretical, structural and mechanistic aspects are covered. The Journal, however, does not accept work of purely routine nature. For reviews and special issues on particular topics of fluorine chemistry or from selected symposia, please contact the Regional Editors for further details.