Activating reversible carbonate reactions in Nasicon solid electrolyte-based Na-air battery via in-situ formed catholyte.

ABSTRACT: Out of practicality, ambient air rather than oxygen is preferred as a fuel in electrochemical systems, but CO₂ and H₂O present in air cause severe irreversible reactions, such as the formation of carbonates and hydroxides, which typically degrades performance. Herein, we report on a Na-air battery enabled by a reversible carbonate reaction (Na₂CO₃·xH₂O, x = 0 or 1) in Nasicon solid electrolyte (Na₃Zr₂Si₂PO₁₂) that delivers a much higher discharge potential of 3.4 V than other metal-air batteries resulting in high energy density and achieves > 86 % energy efficiency at 0.1 mA cm^-2 over 100 cycles. This cell design takes advantage of moisture in ambient air to form an in-situ catholy

SUBMITTER: Park H 

PROVIDER: S-EPMC10997774 | biostudies-literature | 2024 Apr

REPOSITORIES: biostudies-literature