1-(2-Methoxyethyl)-1-methylpyrrolidinium Bis(fluorosulfonyl)imide TCI M2998

TCI M2998 is 1-(2-Methoxyethyl)-1-methylpyrrolidinium Bis(fluorosulfonyl)imide, an ionic liquid built from an ether-substituted pyrrolidinium cation paired with the bis(fluorosulfonyl)imide (FSI) anion. Ionic liquids are salts that exist in the liquid state at relatively low temperatures and exhibit almost no vapour pressure, which allows them to serve as non-conventional solvents and electrolytes in the laboratory. This particular compound is studied extensively in the field of energy storage, especially as an electrolyte component in lithium-ion and sodium-ion battery research and in investigations of electrochemical interfaces.

The properties that make this material attractive come from the combination of its two ions. The pyrrolidinium cation provides a wide electrochemical window, while the FSI anion is recognised for delivering lower viscosity and better ionic conductivity than other imide anions. The 2-methoxyethyl chain on the cation introduces an ether group that increases chain flexibility, helps reduce viscosity, and supports the dissolution of lithium salts. As an ionic liquid, the material is practically non-volatile and non-flammable — two characteristics highly valued in electrolyte research because they address the safety concerns associated with conventional volatile organic electrolytes.

In Indonesian laboratories, this ionic liquid is typically used in university and institutional research groups working on battery materials, electrochemistry, and advanced materials. It is generally handled in small quantities on an analytical scale, within a glovebox or under an inert atmosphere, and is used in the preparation of electrolyte formulations for coin cell assembly, conductivity measurement, and electrochemical characterisation studies such as cyclic voltammetry and impedance spectroscopy.

• Lithium-ion battery electrolyte research: the wide electrochemical window of the pyrrolidinium cation and the good ionic transport of the FSI anion make it suitable as a base electrolyte medium for cell testing.
• Sodium-ion battery studies: the same non-volatile ionic liquid framework is applied in sodium-based systems where thermally stable, low vapour pressure electrolytes are required for extended cycling experiments.
• Electrochemical interface investigation: because it is a pure salt in the liquid state, it is well suited to studies of electrode–electrolyte interphase formation and double-layer behaviour at electrode surfaces.
• Non-volatile solvent applications: its negligible vapour pressure allows it to replace volatile organic solvents in experiments that require prolonged heating or operation under reduced pressure conditions.
• Lithium salt dissolution and formulation work: the ether functionality of the 2-methoxyethyl chain assists the dissolution of lithium salts, supporting the preparation of homogeneous electrolyte mixtures for laboratory evaluation.

• Chemical name: 1-(2-Methoxyethyl)-1-methylpyrrolidinium Bis(fluorosulfonyl)imide

Store the container tightly closed in a cool, dry place away from direct sunlight and sources of heat. Ionic liquids of this type are hygroscopic, so exposure to atmospheric moisture should be minimised; transferring and weighing inside a glovebox or under an inert atmosphere is recommended where the experimental work requires low water content. Use clean, dry glassware or compatible chemical-resistant containers for handling and sub-packaging, and reseal the original container promptly after each use. Standard laboratory precautions apply: work in a well-ventilated area or fume hood, wear safety glasses, gloves, and a laboratory coat, and avoid contact with skin and eyes. Always consult the manufacturer's safety data sheet before use, and dispose of residues in accordance with applicable chemical waste procedures.

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