A room temperature rechargeable Li2O-based lithium-air battery enabled by a solid electrolyte.

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    • Subject Terms:
      LITHIUM-air batteries; LITHIUM compounds; SOLID electrolytes; SUPEROXIDES; NANOPARTICLES; POLYELECTROLYTES; POLYMERIC composites; POLARIZATION (Electrochemistry)
    • Abstract:
      A lithium-air battery based on lithium oxide (Li2O) formation can theoretically deliver an energy density that is comparable to that of gasoline. Lithium oxide formation involves a four-electron reaction that is more difficult to achieve than the one- and two-electron reaction processes that result in lithium superoxide (LiO2O ) and lithium peroxide (Li2O2), respectively. By using a composite polymer electrolyte based on Li10GeP2S12 nanoparticles embedded in a modified polyethylene oxide polymer matrix, we found that Li2O is the main product in a room temperature solid-state lithium-air battery. The battery is rechargeable for 1000 cycles with a low polarization gap and can operate at high rates. The four-electron reaction is enabled by a mixed ion-electron-conducting discharge product and its interface with air. [ABSTRACT FROM AUTHOR]
    • Abstract:
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