Hierarchically structured reduced graphene oxide/WO3 frameworks for an application into lithium ion battery anodes

Abstract

In this study, we demonstrate the synthesis of WO3 particle deposited on three-dimensional (3D) macroporous reduced graphene oxide (RGO) frameworks for lithium ion battery anodes. WO3 particles are uniformly deposited on the surface of RGO sheets and the resulting RGO/WO3 frameworks reveal hierarchically structured, 3D networks assembled during a hydrothermal process. The hierarchically architectured RGO/WO3 hybrid frameworks achieve a discharge capacity of 487mAhg−1 even after 100 cycles at 150mAg−1 and reversible capacity as high as 356mAhg−1 at a high rate of 300mAg−1. Such the improved battery performances of RGO/WO3 frameworks are attributed to uniform dispersion of discrete WO3 particles and 3D macroporous continuity, which provides a high accessible area, easy accessibility to redox sites, short ion diffusion length, and rapid charge and mass transport.