화학공학소재연구정보센터
Chemical Engineering Journal, Vol.281, 724-729, 2015
Hierarchically structured reduced graphene oxide/WO3 frameworks for an application into lithium ion battery anodes
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 487 mA h g(-1) even after 100 cycles at 150 mA g(-1) and reversible capacity as high as 356 mA h g(-1) at a high rate of 300 mA g(-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. (C) 2015 Elsevier B.V. All rights reserved.