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.
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH
 This invention was made with government support under ARPA-e grant No. AR0000038, awarded by the Advanced Research Projects Agency of the Department of Energy. The United States government has certain rights in this invention.
 All publications, patents, and patent applications cited in this Specification are hereby incorporated by reference in their entirety.