Lithium storage performance of Sn-MOF-derived SnO2 nanospheres as anode material.

In this work, a spherical Sn-MOF precursor was synthesized through hydrothermal method using 1,3,5-benzenetricarboxylic acid (H₃BTC) as the organic ligand. Sn-MOF-200, Sn-MOF-250, and Sn-MOF-300 were obtained at different annealing temperatures. Among them, the Sn-MOF-250 composite obtained by annealing at 250 ℃ was stable in structure, and the specific surface area is 118.8 m² g⁻¹. The specific capacity of Sn-MOF-250 can be maintained up to 846.6 mA h g⁻¹ after 110 cycles at the current density of 100 mA g⁻¹ when used as the anode material of lithium-ion battery. The excellent cycling performance of Sn-MOF-250 is due to the special framework structure of metal–organic frameworks (MOFs). After combining with Sn ion, the metal–organic coordination compound formed can greatly improve the diffusion and transport efficiency of lithium ion. This facile synthesis strategy has a certain application prospect in the development of high-performance lithium-ion battery anode materials. [ABSTRACT FROM AUTHOR]