A Multifunctional NaSe/Zn-Mn Skeleton Enables Processable and Highly Reversible Sodium Metal Anode.

The recent high-energy density sodium (Na) metal batteries (SMBs) are restricted by their processability, lifetime, and safety. These issues can be addressed by controlling the reactions at the Na metal by modifying the Na metal anode (SMA) with the sodiophilic hosts. Herein, a multifunctional NaSe/Zn-Mn skeleton is introduced for SMA and fabricate a processable Na@NaSe/Zn-Mn composite using repeated cold rolling/folding approach through the spontaneous reaction between Na metal and ZnMnSe alloy.