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Designed C2-Substituted 4,5 Dicyanoimidazole Lithium Salts for Electrolytes in Li-ion Batteries

Authors: Pokorný Daniel | Klikar Milan | Černý Tomáš | Šojdrová Adéla | Syrový Tomáš | Bureš Filip

Year: 2025

Type of publication: ostatní - přednáška nebo poster

Page from-to: nestránkováno

Titles:

Language	Name	Abstract	Keywords
eng	Designed C2-Substituted 4,5 Dicyanoimidazole Lithium Salts for Electrolytes in Li-ion Batteries	Lithium-ion batteries are essential power sources of the modern consumer electronics, while their further innovations are aimed at enhancing the production efficiency, extending the charge cycle lifetimes, and achieving full recyclability. Traditional Li-ion electrolytes are represented by inorganic salts such as LiPF6 and LiBF4. However, these salts are approaching their electrochemical and safety limits and also face new challenges in raw material availability. To address these limitations, organic lithium salts have emerged as promising alternatives, offering advantages such as facile and tunable synthesis, safety, and superior electrochemical performance. Stabilized anions such as sulfonamides (e.g. LiTFSI and LiFSI), boron-based salts (e.g. LiDFOB), and organic methanides (e.g. LiTFSM) are well-explored categories. In addition, heteroaromatic lithium trifluoromethyl-dicyanoimidazol-1-ide (LiTDI), stands out due to its exceptional electrochemical stability, simple and economic synthesis, and high solubility along with its multipurpose applications including charge carrier, additive, and moisture scavenger. Taking LiTDI and its remarkable properties as a benchmark and considering our experience in dicyanoimidazole chemistry, we have designed a series of structurally related derivatives bearing 4,5 dicyanoimidazole unit and various substitution at the imidazole C2 position to enhance anion stabilization and modulate the pKa of the corresponding 1H-imidazole. We will further demonstrate how these modifications affect solubility and electrochemical properties.	dicyanoimidazole; solubility; electrochemical properties