In recent years, the academic sector has actively explored anode-free sodium batteries (also known as reservoir-free sodium batteries) as a potential alternative to lithium batteries. The joint research team from Lingnan University, Tsinghua University, and the Beijing Institute of Technology identified the critical step governing the stability of sodium batteries: the kinetics of sodium ion deposition. Additionally, since the fully discharged anode-free sodium battery contains no metallic sodium, production and transportation are safer. The research team noted that this breakthrough provides valuable insights into the design of safe and stable anode-free sodium batteries, laying the groundwork for future applications. Our new anode-free sodium battery replaces lithium with sodium, a more abundant and affordable resource.