Zn–Mn-ptcda derived two-dimensional leaf-like Zn0·697Mn0·303Se/C composites as anode materials for high-capacity Li-ion batteries

Abstract As the most widely used energy storage device today, lithium-ion batteries (LIBs) will determine the convenience and durability of people's future energy life to a certain extent. At present, there are many and mature researches on cathode materials for LIBs, so it is crucial to seek a high-performance anode material. In recent years, due to considerable theoretical capacity, abundant raw material reserves and unique physicochemical properties, Zn and Mn selenium compounds have become research hotspots for LIBs anode materials. In this work, a new MOF material Zn–Mn-ptcda was synthesized by a simple hydrothermal reaction. Using Zn–Mn-ptcda as the precursor, two-dimensional (2D) elliptical leaf-shaped Zn0·697Mn0·303Se/C composites were synthesized by direct selenization. Zn0.697Mn0.303Se/C has a large specific surface area of 213.9 m2 g−1, belongs to the mesoporous structure, and possesses excellent lithium storage performance, especially the rate performance. It has a reversible capacity of 1005.14 mAh g−1 after 110 cycles at a current density of 100 mA g−1. After 1000 cycles at a high current density of 1 A g−1, it still maintains a good capacity of 653.79 mAh g−1.