Iron based dual-metal oxides on graphene for lithium-ion batteries anode: Effects of composition and morphology

Abstract

Lithium-ion battery anode Hollow nanostructure a b s t r a c t Dual-transition-metal oxide (DTMO) nanostructures are emerging materials for lithium-ion battery (LIB) anodes with improved structural stability, electronic conductivity and electrochemical performance compared to their single-metal counterpart. Herein, composites of graphene with DTMOs (MFeO, M ¼ Co, Mn, Zn) were controllably prepared by harnessing the synthesis atmospheres and the nanoscale diffusion couple. Their composition and morphology were characterized by TEM, EDS mappings, XRD and XPS. The NH 3 treatment resulted in the formation of hollow DTMO nanoparticles on nitrogen-doped graphene, while H 2 and Ar gave graphene-supported hollow and solid DTMO particles, respectively. Electrochemical tests were applied to compare the performance of these composites as LIB anodes. The superior anode performance DTMO electrodes was demonstrated to the corresponding iron oxide composite. CoFe 2 O/RGO composites exhibit excellent rate capability and high-rate cycling stability for lithium storage, due to its stable solid structure. However, the hollowing of DTMO particles cannot elevate the capacity and stability, due to the interfacial resistance and structural changes upon cycling.

Modified Electrodes for Determining Trace Metal Ions

“…With the addition of other substance that can form the bond via conjugation with graphene, electrocatalization as well as electroluminescence (ECL) can be facilitated. This modiied graphene derivatives can be use satisfactorily in both waste water treatment via adsorption [20] as well as analysis in only one step [21] in addition to the development of new bateries [21,22] and improvement of antibacterial properties [23].…”

Laser Reduction of Graphene Oxide/Zinc Oxide Nanoparticle Nanocomposites as a One‐Step Process for Supercapacitor Fabrication

“…GO/RGO nanocomposite films containing various metal oxide nanoparticles can display superior electrical properties and be used for an even larger variety of applications. The introduction of metal oxide nanoparticles, such as zinc oxide (ZnONPs), aluminum‐doped zinc oxide, and various mixed ferrites (MFe 2 O 4 , M = Co, Zn, Cu, Ni, Mn, and so on), into the GO/RGO matrix has been explored for manufacturing supercapacitors, pollutant sensors, lithium‐ion battery electrodes, and luminescent materials . This wide variety of devices is possible because GO/RGO has a high chemical affinity and numerous adsorption sites available to interact with metal oxide nanoparticles.…”

Thermal Analysis, Morphology and Electrochemical Application of Graphene Decorated SnO2 Nanoparticles

“…Graphene oxide is known to be a good 2D support to nucleate and anchor metal oxide nanoparticles on the edges and surface which has been backed up recently . Transition metal oxides such as MnO 2 , Fe 2 O 3 etc have received attention across the world and are also regarded as promising electrode materials of lithium or sodium ion batteries in relation to energy storage and ability to deliver reversible capacity . These oxides when in hybrid with other nanostructured materials of different shapes give rise to high surface zone, non‐poisonous quality, biocompatibility, simplicity of manufacture, and also astounding electrochemical reactant movement.…”