Anode-Free Sodium Batteries: A Review

So-called anode-free sodium batteries represent a very promising version of post-lithium era devices. The present brief review considers their principal features (both advantages and disadvantages). The main problems connected with their development are phenomena of dendrite formation and encapsulation. These problems could be solved via improvement of negative electrode current collectors (enhancing of their sodiophilicity), as well as the electrolytes’ optimization, in particular, for the development of high-quality solid electrolyte interphases (SEI).