Encapsulation of Fe3O4 Nanoparticles into N, S co-Doped Graphene Sheets with Greatly Enhanced Electrochemical Performance.

ABSTRACT: Particular N, S co-doped graphene/Fe3O4 hybrids have been successfully synthesized by the combination of a simple hydrothermal process and a subsequent carbonization heat treatment. The nanostructures exhibit a unique composite architecture, with uniformly dispersed Fe3O4 nanoparticles and N, S co-doped graphene encapsulant. The particular porous characteristics with many meso/micro holes/pores, the highly conductive N, S co-doped graphene, as well as the encapsulating N, S co-doped graphene with the high-level nitrogen and sulfur doping, lead to excellent electrochemical performance of the electrode. The N-S-G/Fe3O4 composite electrode exhibits a high initial reversible capacity of 1362.2?mAhg(-1), a high reversible specific capacity of 1055.20?mAhg(-1) after 100 cycles, and excellent cycling stability and rate capability, with specific capacity of 556.69?mAhg(-1) when cycled at the current density of 1000?mAg(-1), indicating that the N-S-G/Fe3O4 composite is a promising anode candidate for Li-ion batteries.

SUBMITTER: Yang Z 

PROVIDER: S-EPMC4906393 | biostudies-literature | 2016 Jun

REPOSITORIES: biostudies-literature