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

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 Sn4P3-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, approximate to 585 and approximate to 315 mA h g(-1) at 0.1, 2, and 10 A g(-1), respectively).