Advanced rechargeable Na-CO2 batteries enabled by a ruthenium@porous carbon composite cathode with enhanced Na2CO3 reversibility

Despite high energy density and low cost, rechargeable Na-CO2 batteries are highly hindered by the poor reversibility of the discharge product Na2CO3. Herein, we demonstrate a porous ketjen black carbon-supported ruthenium nanoparticle (Ru@KB) cathode, which can remarkably promote the reversibility and thus leads to an excellent cycling performance.