Graphene encapsulated Fe₃O₄ nanorods assembled into a mesoporous hybrid composite used as a high-performance lithium-ion battery anode material

Abstract

A new nanostructured mesoporous composite comprised of 75% iron oxide nanorods and 25% reduced graphene oxide shows high electrochemical performances as a promising lithium-ion battery anode material.

Three-dimensional iron sulfide-carbon interlocked graphene composites for high-performance sodium-ion storage

“…A broad lowintensity peak in the range of 24-28° (marked by purple arrow) related to the stack of graphene sheets. 32,38 The Raman spectra (Fig. 1b) further indicated the finger-printed signals of graphene.…”

“…While, Fe7S8@C-G showed red-shifted peaks at 1334.54 cm -1 (D band) and 1594.97 cm -1 (G band) in comparison to those of MIL-88-Fe/GO and GO, indicating the hybrid structure and electronic interaction between graphene sheets and Fe7S8@C nanoparticles rather than simply physical adsorption. 38,41 The chemical bonding states of Fe7S8@C-G composites were investigated by XPS analysis. All signals originating from expected elements (S, C, O and Fe) were obtained in the survey spectrum (Fig.…”

Synthesis of Uniquely Structured Yolk–Shell Metal Oxide Microspheres Filled with Nitrogen‐Doped Graphitic Carbon with Excellent Li–Ion Storage Performance

“…The prepared unique structured composite microspheres showed excellent lithium‐ion storage performances based on gravimetric and volumetric capacities, long‐term cycling, and rate performances. The electrochemical properties of the prepared FeO x ‐NGC/Y microspheres are compared with those of the iron oxide materials with various morphologies reported in the previous literatures, and the results are summarized in Table S1 in the Supporting Information . The FeO x ‐NGC/Y microspheres prepared by one‐pot spray pyrolysis process had superior long‐term cycling and rate performances compared to those of the iron oxide materials prepared by various preparation processes.…”

“…The DCDA additive played a key role in the formation of nitrogen‐doped graphitic carbon for high electrical conductivity and a porous carbon layer. Nanostructured iron oxide materials with various morphologies have recently received increased attention as promising anode materials for rechargeable lithium‐ion batteries because of their high theoretical capacity, nontoxicity, low cost, and improved safety . Therefore, the new strategy was first applied to the preparation of novel structured FeO x ‐NGC/Y composite microspheres.…”

In situ Synthesis of V2O3‐Intercalated N‐doped Graphene Nanobelts from VOx‐Amine Hybrid as High‐Performance Anode Material for Alkali‐Ion Batteries

“…On the heels of gradual depletion of fossil fuel and aggravation of environmental problems, renewable energy sources and high‐efficiency electrochemical energy storage devices are highly desirable . Rechargeable lithium‐ion batteries (LIBs) and sodium‐ion batteries (SIBs) are regarded as the most promising electrochemical energy storage systems because of the high energy densities, long cycle life, and environmental friendliness . The charge storage performance of alkali‐ion batteries depends on the electrode materials and so development of high‐performance electrode materials is imperative to the success of advanced LIBs and SIBs …”