Long lifespan quasi-solid-state sodium-air batteries based on Na-BP-DME@C anode

Sodium-air batteries have become a hot research topic in metal-air batteries due to their high energy density and low cost. However, with metallic sodium as an anode, they suffer from problems such as sodium dendrite growth, poor interfacial stability and high reactivity of metallic sodium, which limits their rapid development. In order to solve the problems above, in this study, sodium biphenyl was combined with conductive carbon black (Na-BP-DME@C) as the anode material and single-walled carbon nanohorns (SWCHNs) as the catalyst to construct quasi-solid-state sodium-air batteries. The quasi-solid-state sodium-air battery based on Na-BP-DME@C anode exhibited excellent electrochemical performance with a voltage gap of 1.5 V, a power density of 3.32 mW/cm², and a stable cycle for 459 h (approximately 459 cycles) at a current density of 0.1 mA/cm².