synthesis of One-Dimensional Copper Sulfide Nanorods as High-Performance Anode in Lithium Ion Batteries

Nanorod-like CuS and Cu2S have been fabricated by a hydrothermal approach without using any surfactant and template. The electrochemical behavior of CuS and Cu2S nanorod anodes for lithium-ion batteries reveal that they exhibit stable lithium-ion insertion/extraction reversibility and outstanding rate capability. Both of the electrodes exhibit excellent capacity retentions irrespective of the rate used, even at a high current density of 3200 mAg(-1). More than 370 mAhg(-1) can be retained for the CuS electrode and 260 mAhg(-1) for the Cu2S electrode at the high current rate. After 100 cycles at 100 mAg(-1), the obtained CuS and Cu2S electrodes show discharge capacities of 472 and 313 mAhg(-1) with retentions of 92% and 96%, respectively. Together with the simplicity of fabrication and good electrochemical properties, CuS and Cu2S nanorods are promising anode materials for practical use the next-generation lithium-ion batteries.