CoO/CoFe2O4 core/shell nanoparticles assembled in carbon sheets as anode materials for lithium ion battery

We demonstrate a facile method to prepare monodisperse CoO-CoFe2O4 core-shell nanoparticles and a NaCl-assisted thermal sintering route to the generation of monodisperse core-shell structure of CoO-CoFe2O4 nanoparticles embedded in carbon sheet. Owing to the unique core-shell nanostructure, CoO-Co2FeO4 carbon nanosheets show excellent electrochemical performance as the anode material in lithium ion batteries. The discharge capacity can still maintain 1127 mAh g(-1) thoughout 50 cycles at current density of 100 mA g(-1). This synthetic strategy is inexpensive, facile and easily for large-scale production. The developed CoO-CoFe2O4 core-shell carbon nanosheets can be considered as promising battery materials. (C) 2019 Elsevier B.V. All rights reserved.