Metal-air cell with performance enhancing additive
AssigneeArizona Board of Regents, acting for and on behalf of Arizona State University
InventorsCody A. Friesen, Daniel Buttry
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Abstract
Systems and methods drawn to an electrochemical cell comprising a low temperature ionic liquid comprising positive ions and negative ions and a performance enhancing additive added to the low temperature ionic liquid. The additive dissolves in the ionic liquid to form cations, which are coordinated with one or more negative ions forming ion complexes. The electrochemical cell also includes an air electrode configured to absorb and reduce oxygen. The ion complexes improve oxygen reduction thermodynamics and/or kinetics relative to the ionic liquid without the additive.
Claims19
A method comprising:
- mixing (a) an oxygen reduction enhancing compound that dissociates into oxygen reduction enhancing positive ions, with (b) a low temperature ionic liquid to create a solution comprising an oxygen reduction enhancing positive-negative ion complex formed between the oxygen reduction enhancing positive ions and one or more negative ions in the low temperature ionic liquid;
- exposing the solution to oxygen;
- and
- electrochemjcally reducing the oxygen,
- wherein the oxygen reduction enhancing compound comprises an additive that is at least one of triflic acid, benzonitrile:
- HTf, acetophenone:
- HTf, methanesulfonic acid, hydronium triflate, pyridazinium triflate, acetic acid, pryidinium triflate, 1,2-dimethjylimidaozlium triflate, n,n- diethyl-n-methylammonium triflate, 2,2,2-trifluoroethanol, and 2-butyl-1,1,3,3-tetramethylguanidinium triflate.
Dependencies are inferred from the claim text.