Enhanced electrochemical properties of Mn3O4/graphene nanocomposite as efficient anode material for lithium ion batteries

We report the synthesis of Mn3O4 nanostructures and their graphene composites following a novel, surfactant free, single-step hydrothermal method. The structural and morphological characterizations of graphene wrapped Mn3O4 nano-octahedrons (Mn3O4-rGO) are carried out using powder X-ray diffraction (XRD), Raman spectroscopy, FT-IR spectroscopy, Field emission scanning electron microscopy (FE-SEM), high resolution transmission electron microscopy (HR-TEM) and X-ray photoelectron spectroscopy (XPS). We study the electrochemical properties of as-prepared Mn3O4 and Mn3O4-rGO composite as anodes for lithium ion batteries (LIBs). Mn3O4-rGO composite electrode showed excellent electrochemical properties when cycled against Li/Li+, with a reversible specific capacity of 474 mAh g(-1) at 100 mA g(-1) upon 200 cycles. Further, we investigate the kinetics behavior of these electrodes and study their capacitive contribution towards total charge storage. With a high capacitive contribution of similar to 73% at 1.0 mV s(-1), Mn3O4-rGO composite electrode exhibits excellent potential for their application in lithium ion battery and hybrid lithium ion capacitor devices. (C) 2018 Elsevier B.V. All rights reserved.