In-situ synthesis of nanocomposite from metal-organic frameworks template for high-performance rechargeable batteries

Metal-organic frameworks (MOFs) as a new type of hybrid material assembled with metallic ions and organic ligands, is useful precursors or templates for the construction of various materials. MOFs derivatives show excellent performance as Li ion batteries (LIBs) electrodes or catalytic materials. Herein, we report a convenient, straightforward one-pot preparation of tin oxides nanoparticles confined in porous carbon matrices by carbonizing Sn-based MOFs. The as-prepared SnO2/SnO@C electrode show excellent cycling electrochemical and rate properties. It delivers an initial specific capacity of 1567.1 mA h g(-1) at 100 mA g(-1) current density as well as a remarkably enhanced cycle performance. Density functional theory (DFT) theoretical calculations, ex-situ X-ray diffraction (XRD) and X-ray photoelectron spectra (XPS) further reveal the lithium storage mechanism of SnO2/SnO@C electrodes. These results demonstrate that as-synthesized SnO2/SnO@C composite is a promising anode material for LIBs.