Research demonstrates improved ionic conductivity and reduced dendrite growth in sodium metal batteries using bismuth selenide, suggesting enhanced battery lifespan.
Key Points
Achieving an ultralong cycling lifespan of over 2100 hours indicates remarkable stability in sodium metal batteries with the Bi2Se3 interface.
Sodium bismuth alloy and sodium selenide form a multifunctional interlayer, significantly enhancing ionic conductivity and sodiophilic capability for uniform Na+ transfer.
The use of topological insulator Bi2Se3 successfully mitigates dendrite growth, addressing a major limitation of sodium metal batteries.
The Bi2Se3-Na||Na3V2(PO4)3 full cell retains a high capacity of 93.7% after 1500 cycles at a high current density of 20C, suggesting practical viability.