Abstract
In this study, we use CuInSe2 nanocrystals as an anode material for lithium ion batteries. Gram-scale uniform CuInSe2 nanoparticles without any size selection were synthesized by the heating-up method. As- obtained nanoparticles were characterized by tools including through X-ray differaction (XRD), LR/HR-TEM, and EDS. At ambient temperature, discharge-charge cycling was performed in the voltage window of 0.01V-2.5V (vs. Li metal) at a current density of 100µA/cm2 which corresponds to about the 0.1C rate, showing a reversible capacity of about 600 mAh/g. The excellent electrochemical capacity and stable life performance of CuInSe2 nanoparticles were demonstrated. Based on the analysis of cyclic voltammetry (CV) and ex-situ XRD, reaction mechanism of CuInSe2 nanoparticles with lithium was proposed. CuInSe2 nanoparticles have advantages of faire stable capacity, long batteries cycle life and good performance in high rate test, making it potential anode materials for future lithium ion batteries.