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Lithium Ion Conducting Ionic Electrolytes

DOE Grant Recipients

Arizona Technology Enterprises

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Technology Marketing SummaryAs mobile electronics continue to evolve, the need for high-output, long-lasting rechargeable batteries has grown tremendously. In the search for suitable materials from which to construct high energy density batteries, one of the principal obstacles has been the provision of a suitable electrolyte that exhibits the right combination of conductivity and ion mobility, stability, and wide electrochemical window. Very few electrolytes have been developed thus far that exhibit the above combination of performance parameters. Despite significant research in the area, there remains a need for improved electrolytes that can be easily incorporated into voltaic cells without significant extra cost.DescriptionResearchers at Arizona State University have developed a new class of viscous electrolytes which combine lithium salts with high molecular weight anionic polymers. The resulting electrolytes are stable, highly conductive, resist crystallization, and have a wide electrochemical window. As such, they are excellent targets for use in rechargeable electrochemical devices such as batteries.Benefits•    High Conductivity – exceptionally high conductivity at temperatures of 100 degrees or lower (including room temperature).
•    Cation Conductivity – avoids undesirable cell polarization problems.
•    Rubbery Consistency – permits the deformation of the electrolyte as needed to accommodate volume changes during charging and discharging cycles
•    Wide electrochemical window – permits the utilization of anode/cathode combinations which provide high voltages
•    Good adherence to the electrode surfaces – prevents mechanical/electrical problems that could otherwise develop during charging and discharging cycles
Applications and Industries•    Primary and Secondary Batteries
•    Photochromic Devices
•    Solar Cells
More InformationThis technology part of a large suite of electrolyte and battery technologies developed at Arizona State University. Significant testing has been completed, and the results have been published. At this time, AzTE is seeking potential partners and licensees for this issued patent and related technologies.Patents and Patent Applications
ID Number
Title and Abstract
Primary Lab
Patent 5,484,670
Lithium ion conducting ionic electrolytes
A liquid, predominantly lithium-conducting, ionic electrolyte is described which has exceptionally high conductivity at temperatures of C. or lower, including room temperature. It comprises molten lithium salts or salt mixtures in which a small amount of an anionic polymer lithium salt is dissolved to stabilize the liquid against recrystallization. Further, a liquid ionic electrolyte which has been rubberized by addition of an extra proportion of anionic polymer, and which has good chemical and electrochemical stability, is described. This presents an attractive alternative to conventional salt-in-polymer electrolytes which are not cationic conductors.
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