High-performance Zn2SnO4 anodes enabled by MOF-derived MnO decoration and carbon confinement for lithium-ion batteries

Abstract

Fabrication of porous micro/nanostructures with high electronic conductivity is very efficient for enhancing the electrochemical performance of transition metal oxide-based anode materials for lithium-ion batteries. Here, we successfully propose Zn₂SnO₄ composites functionalized using biomass-derived carbon and metal–organic framework derived MnO/C. The fabricated LC@Zn₂SnO₄@MnO/C composite exhibits superior electrochemical performance with a reversible capacity of 1185.6 mA h g⁻¹ at 200 mA g⁻¹ and maintains 552 mA h g⁻¹ even at 2 A g⁻¹ for 150 cycles. The significantly improved performance suggests that the unique structure constructed by MOF-derived oxide decoration and dual-carbon coating can efficiently enhance the material integrity and facilitate charge transfer upon repeated (de)lithiation processes, demonstrating a general strategy for the preparation of mixed-metal-oxide nanostructures for batteries with improved electrochemical performance.