Ambient lithium-SO2 batteries with ionic liquids as electrolytes

Angew Chem Int Ed Engl. 2014 Feb 17;53(8):2099-103. doi: 10.1002/anie.201309539. Epub 2014 Jan 20.

Abstract

Li-SO2 batteries have a high energy density but bear serious safety problems that are associated with pressurized SO2 and flammable solvents in the system. Herein, a novel ambient Li-SO2 battery was developed through the introduction of ionic liquid (IL) electrolytes with tailored basicities to solvate SO2 by reversible chemical absorption. By tuning the interactions of ILs with SO2, a high energy density and good discharge performance with operating voltages above 2.8 V were obtained. This strategy based on reversible chemical absorption of SO2 in IL electrolytes enables the development of the next generation of ambient Li-SO2 batteries.

Keywords: absorption; ionic liquids; lithium; primary batteries; sulfur dioxide.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Electric Power Supplies*
  • Electrochemical Techniques
  • Electrolytes / chemistry*
  • Ionic Liquids / chemistry*
  • Lithium / chemistry*
  • Oxidation-Reduction
  • Sulfur Dioxide / chemistry*

Substances

  • Electrolytes
  • Ionic Liquids
  • Sulfur Dioxide
  • Lithium