A High‐Rate and Ultrastable Sodium Ion Anode Based on a Novel Sn4P3‐P@Graphene Nanocomposite

Abstract Phosphorus and tin phosphide based materials that are extensively researched as the anode for Na‐ion batteries mostly involve complexly synthesized and sophisticated nanocomposites limiting their commercial viability. This work reports a Sn 4 P 3 ‐P (Sn:P = 1:3) @graphene nanocomposite synthesized with a novel and facile mechanochemical method, which exhibits unrivalled high‐rate capacity retentions of >550 and 371 mA h g −1 at 1 and 2 A g −1 , respectively, over 1000 cycles and achieves excellent rate capability (>815, ≈585 and ≈315 mA h g −1 at 0.1, 2, and 10 A g −1 , respectively).