MOF-SnO2 nanoparticles composited with biomass-derived carbon used as high-performance anodes for lithium-ion batteries

SnO 2 has a high specific capacity, low price, and a wide range of sources, but the anode material made from SnO 2 is extremely unstable due to volume expansion. In this work, SnO 2 nanoparticles were prepared using Sn-MOF as the precursor and compounded with sunflower seed shell porous carbon (SSSC) in a solvothermal manner to obtain a high-performance lithium-ion battery anode. The size of SnO 2 nanoparticles prepared using Sn-MOF as the precursor is uniform, only 10–20 nm, which can fully alleviate the volume expansion of SnO 2 . On this basis, MOF-SnO 2 is anchored onto the porous carbon of the sunflower seed shell, which can provide more lithium insertion sites and further inhibit the volume expansion of SnO 2 . The composite anode in this article has a stable specific capacity of 1050.8 mAh g −1 after 100 cycles at a magnification of 0.2C and a stable specific capacity of 512.9 mAh g −1 after 100 cycles at a magnification of 2C.