(Digital Presentation) Straightforward Combustion Synthesis of Tin/Carbon Composite As Anode for Lithium-Ion Battery with Long Cycle Life

The theoretical specific capacities of alloy-based anodes such as Si, Ge, P, Sn, Sb are 2–10 times higher than that of graphite. Tin-based anode materials gained prominence in battery applications owing to their high theoretical capacity, less toxicity, and low cost. However, they suffer from huge capacity losses due to severe volumetric expansion up to 300%. Here in our poster, Sn@C (20 wt% Sn) composite synthesized by single-step combustion process showed good adherence of tin particles on graphite rich carbon which successfully minimizes pulverization with enhanced structural stability. The homogeneously dispersed tin nanoparticles exhibit a highly reversible capacity of 281 mA h g −1 at 300 mA g −1 with 98.6% capacity retention after 300 cycles and 94.6% capacity retention at 500 mA g −1 , after 700 cycles. After cycling, ex-situ XRD and TEM images showed Sn@C intact due to intimate interaction as in Sn-O-C linkage. Figure 1