Synthesis of high‐performance manganese oxide nanorod with ZIF67 as electrode material for lithium‐ion batteries

Abstract

AbstractIntroductionThe demands of the upcoming energy storage technologies are ideally suited for nanomaterials with metal–organic frameworks (MOFs). MOFs are porous materials formed from organic linkers and metal ions offering promising properties for various applications due to their ability to construct finely tunable and homogenous pore architectures.ObjectivesThe primary objective of this study is to synthesize MnO2 with zeolitic imidazole framework 67 (ZIF67) and investigate its electrochemical performance.MethodsNanocomposites of MnO2@ZIF67 were successfully synthesized using a two‐step process involving the hydrothermal method followed by the precipitation method. The synthesized MnO2@ZIF67 nanocomposites were characterized using spectroscopic and microscopy techniques, including x‐ray diffractometry (XRD), field emission scanning electron microscopy (FESEM), and high‐resolution transmission electron microscopy (HRTEM).ResultsThe prepared nanocomposite exhibited an excellent specific capacity of 2629 mAh g−1 during the first cycle, even at a high current rate of 1C (1000 mA g−1). After undergoing 100 cycles, the MnO2@ZIF67 demonstrated good stability and a reversible capacity of 147.3 mAh g−1 at a 1C rate and a remarkable Coulombic efficiency of 96%.ConclusionThe excellent electrochemical performance of the nanocomposite can be attributed to its unique composite structure, which combines porous 3D polyhedra with nanorods. Based on its greater specific capacity, superior cyclability, and improved rate performance, the MnO2@ZIF67 nanocomposite is an effective anode material for lithium‐ion batteries.