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Metal-air cell comprising an electrolyte with a room temperature ionic liquid and hygroscopic additive

United States Patent

August 19, 2014
View the Complete Patent at the US Patent & Trademark Office
An electrochemical cell comprising an electrolyte comprising water and a hydrophobic ionic liquid comprising positive ions and negative ions. The electrochemical cell also includes an air electrode configured to absorb and reduce oxygen. A hydrophilic or hygroscopic additive modulates the hydrophobicity of the ionic liquid to maintain a concentration of the water in the electrolyte is between 0.001 mol % and 25 mol %.
Friesen; Cody A. (Fort McDowell, AZ), Krishnan; Ramkumar (Gilbert, AZ), Tang; Toni (Gilbert, AZ), Wolfe; Derek (Scottsdale, AZ)
13/ 085,714
April 13, 2011
This invention was made with U.S. government support under Contract No. DB-AR-00000038 awarded by the Department of Energy. The government has certain rights in the invention.