CoO/CoFe2O4 bi-component nanorod core with S-doped carbon shell as excellent anode for lithium ion battery

In this work, a novel CoO/CoFe2O4 bi-component nanorod coated with S-doped carbon nanospheres shell (CO/CFO@SC Nr) composites have been synthesized through one in-situ polymerization and subsequent annealing treatment. The S-doped carbon shell, special structure and synergistic effect between CoO and CoFe2O4 significantly enhance the electrochemical performance of the CoO/CoFe2O4 anode material. CO/CFO@SC Nr composites present an impressive capacity of 511.3 mAh g(-1) after 700 cycles when tested at a high current density of 2000 mA g(-1). In addition, this is the first time that polythiophene is used as sulfur and carbon source to synthesis transition metal oxide (TMO) @S-doped carbon core-shell composites. This work illuminates a new preparation way for fabrication other TMO @S-doped carbon core-shell materials for lithium-ion batteries and other energy storage devices. (C) 2017 Elsevier B.V. All rights reserved.